Ketogenic Diet: Burning Fat Or Burning Out?
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In Wednesday’s newsletter, we asked you for your opinion of the keto diet, and got the above-depicted, below-described set of responses:
- About 45% said “It has its benefits, but they don’t outweigh the risks”
- About 31% said “It is a good, evidence-based way to lose weight, be energized, and live healthily”
- About 24% said “It is a woeful fad diet and a fast-track to ruining one’s overall health”
So what does the science say?
First, what is the ketogenic diet?
There are two different stories here:
- Per science, it’s a medical diet designed to help treat refractory epilepsy in children.
- Per popular lore, it’s an energizing weight loss diet for Instagrammers and YouTubers.
Can it be both? The answer is: yes, but with some serious caveats, which we’ll cover over the course of today’s feature.
The ketogenic diet works by forcing the body to burn fat for energy: True or False?
True! This is why it helps for children with refractory epilepsy. By starving the body (including the brain) of glucose, the liver must convert fat into fatty acids and ketones, which latter the brain (and indeed the rest of the body) can now use for energy instead of glucose, thus avoiding one of the the main triggers of refractory epilepsy in children.
See: The Ketogenic Diet: One Decade Later | Pediatrics
Even the pediatric epilepsy studies, however, conclude it does have unwanted side effects, such as kidney stones, constipation, high cholesterol, and acidosis:
Source: Dietary Therapies for Epilepsy
The ketogenic diet is good for weight loss: True or False?
True! Insofar as it does cause weight loss, often rapidly. Of course, so do diarrhea and vomiting, but these are not usually held to be healthy methods of weight loss. As for keto, a team of researchers recently concluded:
❝As obesity rates in the populace keep rising, dietary fads such as the ketogenic diet are gaining traction.
Although they could help with weight loss, this study had a notable observation of severe hypercholesterolemia and increased risk of atherosclerotic cardiovascular disease among the ketogenic diet participants.❞
~ Dr. Shadan Khdher et al.
On which note…
The ketogenic diet is bad for the heart: True or False?
True! As Dr. Joanna Popiolek-Kalisz concluded recently:
❝In terms of cardiovascular mortality, the low-carb pattern is more beneficial than very low-carbohydrate (including the ketogenic diet). There is still scarce evidence comparing ketogenic to the Mediterranean diet.
Other safety concerns in cardiovascular patients such as adverse events related to ketosis, fat-free mass loss, or potential pharmacological interactions should be also taken into consideration in future research.❞
~ Dr. Joanna Popiolek-Kalisz
Read in full: Ketogenic diet and cardiovascular risk: state of the art review
The ketogenic diet is good for short-term weight loss, but not long-term maintenance: True or False?
True! Again, insofar as it works in the short term. It’s not the healthiest way to lose weight and we don’t recommend it, but it did does indeed precipitate short-term weight loss. Those benefits are not typically observed for longer than a short time, though, as the above-linked paper mentions:
❝The ketogenic diet does not fulfill the criteria of a healthy diet. It presents the potential for rapid short-term reduction of body mass, triglycerides level, Hb1Ac, and blood pressure.
Its efficacy for weight loss and the above-mentioned metabolic changes is not significant in long-term observations.❞
~ Ibid.
The ketogenic diet is a good, evidence-based way to lose weight, be energized, and live healthily: True or False?
False, simply, as you may have gathered from the above, but we’ve barely scratched the surface in terms of the risks.
That said, as mentioned, it will induce short-term weight loss, and as for being energized, typically there is a slump-spike-slump in energy:
- At first, the body is running out of glucose, and so naturally feels weak and tired.
- Next, the body enters ketosis, and so feels energized and enlivened ← this is the part where the popular enthusiastic reviews come from
- Then, the body starts experiencing all the longer-term problems associated with lacking carbohydrates and having an overabundance of fat, so becomes gradually more sick and tired.
Because of this, the signs of symptoms of being in ketosis (aside from: measurably increased ketones in blood, breath, and urine) are listed as:
- Bad breath
- Weight loss
- Appetite loss
- Increased focus and energy
- Increased fatigue and irritability
- Digestive issues
- Insomnia
The slump-spike-slump we mentioned is the reason for the seemingly contradictory symptoms of increased energy and increased fatigue—you get one and then the other.
Here’s a small but illustrative study, made clearer by its participants being a demographic whose energy levels are most strongly affected by dietary factors:
The ketogenic diet is a woeful fad diet and a fast-track to ruining one’s overall health: True or False?
True, subjectively in the first part, as it’s a little harsher than we usually go for in tone, though it has been called a fad diet in scientific literature. The latter part (ruining one’s overall health) is observably true.
One major problem is incidental-but-serious, which is that a low-carb diet is typically a de facto low-fiber diet, which is naturally bad for the gut and heart.
Other things are more specific to the keto diet, such as the problems with the kidneys:
However, kidney stones aren’t the worst of the problems:
Is Losing Weight Worth Losing Your Kidney: Keto Diet Resulting in Renal Failure
We’re running out of space and the risks associated with the keto diet are many, but for example even in the short term, it already increases osteoporosis risk:
❝Markers of bone modeling/remodeling were impaired after short-term low-carbohydrate high-fat diet, and only one marker of resorption recovered after acute carbohydrate restoration❞
~ Dr. Ida Heikura et al.
A Short-Term Ketogenic Diet Impairs Markers of Bone Health in Response to Exercise
Want a healthier diet?
We recommend the Mediterranean diet.
See also: Four Ways To Upgrade The Mediterranean
(the above is about keeping to the Mediterranean diet, while tweaking one’s choices within it for a specific extra health focus such as an anti-inflammatory upgrade, a heart-healthy upgrade, a gut-healthy upgrade, and a brain-healthy upgrade)
Enjoy!
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Lime-Charred Cauliflower Popcorn
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Called “popcorn” for its appearance and tasty-snackness, this one otherwise bears little relation to the usual movie theater snack, and it’s both tastier and healthier. All that said, it can be eaten on its own as a snack (even with a movie, if you so wish), or served as one part of a many-dish banquet, or (this writer’s favorite) as a delicious appetizer that also puts down a healthy bed of fiber ready for the main course to follow it.
You will need
- 1 cauliflower, cut into small (popcorn-sized) florets
- 2 tbsp extra virgin olive oil
- 1 tbsp lime pickle
- 1 tsp cumin seeds
- 1 tsp smoked paprika
- 1 tsp chili flakes
- 1 tsp black pepper, coarse ground
- ½ tsp ground turmeric
Method
(we suggest you read everything at least once before doing anything)
1) Preheat your oven as hot as it will go
2) Mix all the ingredients in a small bowl except the cauliflower, to form a marinade
3) Drizzle the marinade over the cauliflower in a larger bowl (i.e. big enough for the cauliflower), and mix well until the cauliflower is entirely, or at least almost entirely, coated. Yes, it’s not a lot of marinade but unless you picked a truly huge cauliflower, the proportions we gave will be enough, and you want the end result to be crisp, not dripping.
4) Spread the marinaded cauliflower florets out on a baking tray lined with baking paper. Put it in the oven on the middle shelf, so it doesn’t cook unevenly, but keeping the temperature as high as it goes.
5) When it is charred and crispy golden, it’s done—this should take about 20 minutes, but we’ll say ±5 minutes depending on your oven, so do check on it periodically—and time to serve (it is best enjoyed warm).
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- We must do a main feature on the merits of cruciferous vegetables! Watch this space.
- All About Olive Oils (Extra Virgin & Otherwise)
- Capsaicin For Weight Loss And Against Inflammation
- Black Pepper’s Impressive Anti-Cancer Arsenal (And More)
- Why Curcumin (Turmeric) Is Worth Its Weight In Gold
Take care!
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Hearing voices is common and can be distressing. Virtual reality might help us meet and ‘treat’ them
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Have you ever heard something that others cannot – such as your name being called? Hearing voices or other noises that aren’t there is very common. About 10% of people report experiencing auditory hallucinations at some point in their life.
The experience of hearing voices can be very different from person to person, and can change over time. They might be the voice of someone familiar or unknown. There might be many voices, or just one or two. They can be loud or quiet like a whisper.
For some people these experiences are positive. They might represent a spiritual or supernatural experience they welcome or a comforting presence. But for others these experiences are distressing. Voices can be intrusive, negative, critical or threatening. Difficult voices can make a person feel worried, frightened, embarrassed or frustrated. They can also make it hard to concentrate, be around other people and get in the way of day-to-day activities.
Although not everyone who hears voices has a mental health problem, these experiences are much more common in people who do. They have been considered a hallmark symptom of schizophrenia, which affects about 24 million people worldwide.
However, such experiences are also common in other mental health problems, particularly in mood- and trauma-related disorders (such as bipolar disorder or depression and post-traumatic stress disorder) where as many as half of people may experience them.
Rawpixel/Shutterstock Why do people hear voices?
It is unclear exactly why people hear voices but exposure to prolonged stress, trauma or depression can increase the chances.
Some research suggests people who hear voices might have brains that are “wired” differently, particularly between the hearing and speaking parts of the brain. This may mean parts of our inner speech can be experienced as external voices. So, having the thought “you are useless” when something goes wrong might be experienced as an external person speaking the words.
Other research suggests it may relate to how our brains use past experiences as a template to make sense of and make predictions about the world. Sometimes those templates can be so strong they lead to errors in how we experience what is going on around us, including hearing things our brain is “expecting” rather than what is really happening.
What is clear is that when people tell us they are hearing voices, they really are! Their brain perceives voice experiences as if someone were talking in the room. We could think of this “mistake” as working a bit like being susceptible to common optical tricks or visual illusions.
There may be differences in the brains of people who hear voices. Triff/Shutterstock Coping with hearing voices
When hearing voices is getting in the way of life, treatment guidelines recommend the use of medications. But roughly a third of people will experience ongoing distress. As such, treatment guidelines also recommend the use of psychological therapies such as cognitive behavioural therapy.
The next generation of psychological therapies are beginning to use digital technologies and virtual reality offers a promising new medium.
Avatar therapy allows a person to create a virtual representation of the voice or voices, which looks and sounds like what they are experiencing. This can help people regain power in the “relationship” as they interact with the voice character, supported by a therapist.
Jason’s experience
Aged 53, Jason (not his real name) had struggled with persistent voices since his early 20s. Antipsychotic medication had helped him to some extent over the years, but he was still living with distressing voices. Jason tried out avatar therapy as part of a research trial.
He was initially unable to stand up to the voices, but he slowly gained confidence and tested out different ways of responding to the avatar and voices with his therapist’s support.
Jason became more able to set boundaries, such as not listening to them for periods throughout the day. He also felt more able to challenge what they said and make his own choices.
Over a couple of months, Jason started to experience some breaks from the voices each day and his relationship with them started to change. They were no longer like bullies, but more like critical friends pointing out things he could consider or be aware of.
A screenshot from HekaVR, the software used in the Australian AMETHYST trial. HekaVR, CC BY-ND Gaining recognition
Following promising results overseas and its recommendation by the United Kingdom’s National Institute for Health and Care Excellence, our team has begun adapting the therapy for an Australian context.
We are trialling delivering avatar therapy from our specialist voices clinic via telehealth. We are also testing whether avatar therapy is more effective than the current standard therapy for hearing voices, based on cognitive behavioural therapy.
As only a minority of people with psychosis receive specialist psychological therapy for hearing voices, we hope our trial will support scaling up these new treatments to be available more routinely across the country.
We would like to acknowledge the advice and input of Dr Nadine Keen (consultant clinical psychologist at South London and Maudsley NHS Foundation Trust, UK) on this article.
Leila Jameel, Trial Co-ordinator and Research Therapist, Swinburne University of Technology; Imogen Bell, Senior Research Fellow and Psychologist, The University of Melbourne; Neil Thomas, Professor of Clinical Psychology, Swinburne University of Technology, and Rachel Brand, Senior Lecturer in Clinical Psychology, University of the Sunshine Coast
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Driving under the influence of marijuana: An explainer and research roundup
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Update 1: On May 16, 2024, the U.S. Department of Justice sent a proposed rule to the Federal Register to downgrade marijuana from a Schedule I to a Schedule III drug. This is the first step in a lengthy approval process that starts with a 60-day comment period.
Update 2: Two recent research studies were added to the “Studies on marijuana and driving” section of this piece on July 18, 2024.
As marijuana use continues to rise and state-level marijuana legalization sweeps the U.S., researchers and policymakers are grappling with a growing public safety concern: marijuana-impaired driving.
As of April 2023, 38 U.S. states had legalized medical marijuana and 23 had legalized its recreational use, according to the National Conference of State Legislatures. Recreational or medical marijuana measures are on the ballot in seven states this year.
The issue of marijuana-impaired driving has not been an easy one to tackle because, unlike alcohol, which has well-established thresholds of impairment, the metrics for marijuana’s effects on driving remain rather elusive.
“We don’t have that kind of deep knowledge right now and it’s not because of lack of trying,” says Dr. Guohua Li, professor of epidemiology and the founding director of the Center for Injury Science and Prevention at Columbia University.
“Marijuana is very different from alcohol in important ways,” says Li, who has published several studies on marijuana and driving. “And one of them is that the effect of marijuana on cognitive functions and behaviors is much more unpredictable than alcohol. In general, alcohol is a depressant drug. But marijuana could act on the central nervous system as a depressant, a stimulant, and a hallucinogenic substance.”
Efforts to create a breathalyzer to measure the level of THC, the main psychoactive compound found in the marijuana plant, have largely failed, because “the THC molecule is much bigger than ethanol and its behavior after ingestion is very different from alcohol,” Li says.
Currently, the two most common methods used to measure THC concentration to identify impaired drivers are blood and saliva tests, although there’s ongoing debate about their reliability.
Marijuana, a term interchangeably used with cannabis, is the most commonly used federally illegal drug in the U.S.: 48.2 million people, or about 18% of Americans reported using it at least once in 2019, according to the latest available data from the Centers for Disease Control and Prevention. Worldwide, 2.5% of the population consumes marijuana, according to the World Health Organization.
Marijuana is legal in several countries, including Canada, where it was legalized in 2018. Despite state laws legalizing cannabis, it remains illegal at the federal level in the U.S.
As states grapple with the contentious issue of marijuana legalization, the debate is not just about public health, potential tax revenues and economic interests. At the heart of the discussion is also the U.S. criminal justice system.
Marijuana is shown to have medicinal qualities and, compared with substances like alcohol, tobacco, and opioids, it has relatively milder health risks. However, it’s not risk-free, a large body of research has shown.
Marijuana consumption can lead to immediate effects such as impaired muscle coordination and paranoia, as well as longer-term effects on mental health and cognitive functions — and addiction. As its use becomes more widespread, researchers are trying to better understand the potential hazards of marijuana, particularly for younger users whose brains are in critical stages of development.
Marijuana and driving
The use of marijuana among drivers, passengers and pedestrians has increased steadily over the past two decades, Li says.
Compared with the year 2000, the proportion of U.S. drivers on the road who are under the influence of marijuana has increased by several folds, between five to 10 times, based on toxicology testing of people who died in car crashes, Li says.
A 2022 report from the National Transportation Safety Board finds alcohol and cannabis are the two most commonly detected drugs among drivers arrested for impaired driving and fatally injured drivers. Most drivers who tested positive for cannabis also tested positive for another potentially impairing drug.
“Although cannabis and many other drugs have been shown to impair driving performance and are associated with increased crash risk, there is evidence that, relative to alcohol, awareness about the potential dangers of driving after using other drugs is lower,” according to the report.
Indeed, many U.S. adults perceive daily marijuana use or exposure to its smoke safer than tobacco, even though research finds otherwise.
Several studies have demonstrated marijuana’s impact on driving.
Marijuana use can reduce the drivers’ ability to pay attention, particularly when they are performing multiple tasks, research finds. It also slows reaction time and can impair coordination.
“The combination is that you potentially have people who are noticing hazards later, braking slower and potentially not even noticing hazards because of their inability to focus on competing things on the road,” says Dr. Daniel Myran, an assistant professor at the Department of Family Medicine and health services researcher at the University of Ottawa.
In a study published in September in JAMA Network Open, Myran and colleagues find that from 2010 to 2021 the rate of cannabis-involved traffic injuries that led to emergency department visits in Ontario, Canada, increased by 475%, from 0.18 per 1,000 traffic injury emergency department visits in 2010 to 1.01 visits in 2021.
To be sure, cannabis-involved traffic injuries made up a small fraction of all traffic injury-related visits to hospital emergency departments. Out of 947,604 traffic injury emergency department visits, 426 had documented cannabis involvement.
Myran cautions the increase shouldn’t be solely attributed to marijuana legalization. It captures changing societal attitudes toward marijuana and acceptance of cannabis use over time in the lead-up to legalization. In addition, it may reflect an increasing awareness among health care providers about cannabis-impaired driving, and they may be more likely to ask about cannabis use and document it in medical charts, he says.
“When you look at the 475% increase in cannabis involvement in traffic injuries, rather than saying legalizing cannabis has caused the roads to be unsafe and is a public health disaster, it’s that cannabis use appears to be growing as a risk for road traffic injuries and that there seem to be more cannabis impaired drivers on the road,” Myran says. “Legalization may have accelerated this trend. Faced with this increase, we need to think about what are public health measures and different policy interventions to reduce harms from cannabis-impaired driving.”
Setting a legal limit for marijuana-impaired driving
Setting a legal limit for marijuana-impaired driving has not been easy. Countries like Canada and some U.S. states have agreed upon a certain level of THC in blood, usually between 1 to 5 nanograms per milliliter. Still, some studies have found those limits to be weak indicators of cannabis-impaired driving.
When Canada legalized recreational marijuana in 2018, it also passed a law that made it illegal to drive with blood THC levels of more than 2 nanograms. The penalties are more severe for blood THC levels above 5 nanograms. The blood test is done at the police station for people who are pulled over and are deemed to be drug impaired.
In the U.S., five states — Ohio, Illinois, Montana, Washington and Nevada — have “per se laws,” which set a specific amount of THC in the driver’s blood as evidence of impaired driving, according to the National Conference of State Legislatures. That limit ranges between 2 and 5 nanograms of THC per milliliter of blood.
Colorado, meanwhile, has a “permissible inference law,” which states that it’s permissible to assume the driver was under the influence if their blood THC level is 5 nanograms per milliliter or higher, according to NCSL.
Twelve states, most which have legalized some form of marijuana of use, have zero tolerance laws for any amount of certain drugs, including THC, in the body.
The remaining states have “driving under the influence of drugs” laws. Among those states, Alabama and Michigan, have oral fluid roadside testing program to screen drivers for marijuana and other drugs, according to NCSL.
In May this year, the U.S. Department of Transportation published a final rule that allows employers to use saliva testing for commercially licensed drivers, including truck drivers. The rule, which went into effect in June, sets the THC limit in saliva at 4 nanograms.
Saliva tests can detect THC for 8 to 24 hours after use, but the tests are not perfect and can results in false positives, leading some scientists to argue against using them in randomly-selected drivers.
In a 2021 report, the U.S. National Institute of Justice, the research and development arm of the Department of Justice, concluded that THC levels in bodily fluids, including blood and saliva “were not reliable indicators of marijuana intoxication.”
Studies on marijuana and driving
Over the past two decades, many studies have shown marijuana use can impair driving. However, discussions about what’s the best way to measure the level of THC in blood or saliva are ongoing. Below, we highlight and summarize several recent studies that address the issue. The studies are listed in order of publication date. We also include a list of related studies and resources to inform your audiences.
State Driving Under the Influence of Drugs Laws
Alexandra N. Origenes, Sarah A. White, Emma E. McGinty and Jon S. Vernick. Journal of Law, Medicine & Ethics, July 2024.Summary: As of January 2023, 33 states and D.C. had a driving under the influence of drugs law for at least one drug other than cannabis. Of those, 29 states and D.C. had a law specifically for driving under the influence of cannabis, in addition to a law for driving under the influence of other drugs. Four states had a driving under the influence of drug laws, excluding cannabis. Meanwhile, 17 states had no law for driving under the influence of drugs, including cannabis. “The 17 states lacking a DUID law that names specific drugs should consider enacting such a law. These states already have expressed their concern — through legislation — with drug-impaired driving. However, failure to name specific drugs is likely to make the laws more difficult to enforce. These laws may force courts and/or law enforcement to rely on potentially subjective indicators of impairment,” the authors write.
Associations between Adolescent Marijuana Use, Driving After Marijuana Use and Recreational Retail Sale in Colorado, USA
Lucas M. Neuroth, et al. Substance Use & Misuse, October 2023.Summary: Researchers use data from four waves (2013, 2015, 2017 and 2019) of the Healthy Kids Colorado Survey, including 47,518 students 15 and older who indicated that they drove. They find 20.3% of students said that they had used marijuana in the past month and 10.5% said they had driven under the influence of marijuana. They find that the availability of recreational marijuana in stores was associated with an increased prevalence of using marijuana one to two times in the past month and driving under the influence of marijuana at least once. “Over the study period, one in ten high school age drivers engaged in [driving after marijuana use], which is concerning given the high risk of motor vehicle-related injury and death arising from impaired driving among adolescents,” the authors write.
Are Blood and Oral Fluid Δ9-tetrahydrocannabinol (THC) and Metabolite Concentrations Related to Impairment? A Meta-Regression Analysis
Danielle McCartney, et al. Neuroscience & Biobehavioral Reviews, March 2022.Summary: Commonly used THC measurements may not be strong indicators of driving impairment. While there is a relationship between certain biomarkers like blood THC concentrations and impaired driving, this correlation is often weak. The study underscores the need for more nuanced and comprehensive research on this topic, especially as cannabis usage becomes more widespread and legally accepted.
The Effects of Cannabis and Alcohol on Driving Performance and Driver Behaviour: A Systematic Review and Meta-Analysis
Sarah M. Simmons, Jeff K. Caird, Frances Sterzer and Mark Asbridge. Addiction, January 2022.Summary: This meta-analysis of experimental driving studies, including driving simulations, confirms that cannabis impairs driving performance, contrary to some beliefs that it might enhance driving abilities. Cannabis affects lateral control and speed — typically increasing lane excursions while reducing speed. The combination of alcohol and marijuana appears worse than either alone, challenging the idea that they cancel each other out.
Cannabis Legalization and Detection of Tetrahydrocannabinol in Injured Drivers
Jeffrey R. Brubacher, et al. The New England Journal of Medicine, January 2022.Summary: Following the legalization of recreational marijuana in Canada, there was a notable increase in injured drivers testing positive for THC, especially among those 50 years of age or older. This rise in cannabis-related driving incidents occurred even with new traffic laws aiming to deter cannabis-impaired driving. This uptick began before legalization became official, possibly due to perceptions that cannabis use was soon-to-be legal or illegal but not enforced. The data suggests that while legalization has broad societal impacts, more comprehensive strategies are needed to deter driving under the influence of cannabis and raise public awareness about its risks.
Cannabis and Driving
Godfrey D. Pearlson, Michael C. Stevens and Deepak Cyril D’Souza. Frontiers in Psychiatry, September 2021.Summary: Cannabis-impaired driving is a growing public health concern, and studies show that such drivers are more likely to be involved in car crashes, according to this review paper. Drivers are less affected by cannabis than they are by alcohol or cocaine, but the problem is expected to escalate with increasing cannabis legalization and use. Unlike alcohol, THC’s properties make it challenging to determine direct impairment levels from testing results. Current roadside tests lack precision in detecting genuine cannabis-impaired drivers, leading to potential wrongful convictions. Moreover, there is a pressing need for research on the combined effects of alcohol and cannabis on driving, as well as the impact of emerging popular forms of cannabis, like concentrates and edibles. The authors recommend public awareness campaigns about the dangers of driving under the influence of cannabis, similar to those against drunk driving, to address misconceptions. Policymakers should prioritize science-based decisions and encourage further research in this domain.
Demographic And Policy-Based Differences in Behaviors And Attitudes Towards Driving After Marijuana Use: An Analysis of the 2013–2017 Traffic Safety Culture Index
Marco H. Benedetti, et al. BMC Research Notes, June 2021.Summary: The study, based on a U.S. survey, finds younger, low-income, low-education and male participants were more tolerant of driving after marijuana consumption. Notably, those in states that legalized medical marijuana reported driving after use more frequently, aligning with studies indicating a higher prevalence of THC detection in drivers from these states. Overall, while the majority perceive driving after marijuana use as dangerous, not all research agrees on its impairment effects. Existing studies highlight that marijuana impacts motor skills and executive functions, yet its direct correlation with crash risk remains debated, given the variations in individual tolerance and how long THC remains in the system.
Driving Under the Influence of Cannabis: A Framework for Future Policy
Robert M. Chow, et al.Anesthesia & Analgesia, June 2019.Summary: The study presents a conceptual framework focusing on four main domains: legalization, driving under the influence of cannabis, driver impairment, and motor vehicle accidents. With the growing legalization of cannabis, there’s an anticipated rise in cannabis-impaired driving cases. The authors group marijuana users into infrequent users who show significant impairment with increased THC blood levels, chronic users with minimal impairment despite high THC levels, and those with consistent psychomotor deficits. Current challenges lie in the lack of standardized regulation for drivers influenced by cannabis, primarily because of state-to-state variability and the absence of a federal statutory limit for blood THC levels. European nations, however, have established thresholds for blood THC levels, ranging from 0.5 to 50.0 micrograms per liter depending on whether blood or blood serum are tested. The authors suggest the combined use of alcohol and THC blood tests with a psychomotor evaluation by a trained professional to determine impairment levels. The paper stresses the importance of creating a structured policy framework, given the rising acceptance and use of marijuana in society.
Additional research
Cannabis-Involved Traffic Injury Emergency Department Visits After Cannabis Legalization and Commercialization
Daniel T. Myran, et al. JAMA Network Open, September 2023.Driving Performance and Cannabis Users’ Perception of Safety: A Randomized Clinical Trial
Thomas D. Marcotte, et al. JAMA Psychiatry, January 2022.Medicinal Cannabis and Driving: The Intersection of Health and Road Safety Policy
Daniel Perkins, et al. International Journal of Drug Policy, November 2021.Prevalence of Marijuana Use Among Trauma Patients Before and After Legalization of Medical Marijuana: The Arizona Experience
Michael Levine, et al. Substance Abuse, July 2021.Self-Reported Driving After Marijuana Use in Association With Medical And Recreational Marijuana Policies
Marco H. Benedetti, et al. International Journal of Drug Policy, June 2021.Cannabis and Driving Ability
Eric L. Sevigny. Current Opinion in Psychology, April 2021.The Failings of per se Limits to Detect Cannabis-Induced Driving Impairment: Results from a Simulated Driving Study
Thomas R. Arkell, et al. Traffic Injury Prevention, February 2021.Risky Driving Behaviors of Drivers Who Use Alcohol and Cannabis
Tara Kelley-Baker, et al. Transportation Research Record, January 2021.Direct and Indirect Effects of Marijuana Use on the Risk of Fatal 2-Vehicle Crash Initiation
Stanford Chihuri and Guohua Li. Injury Epidemiology, September 2020Cannabis-Impaired Driving: Evidence and the Role of Toxicology Testing
Edward C. Wood and Robert L. Dupont. Cannabis in Medicine, July 2020.Association of Recreational Cannabis Laws in Colorado and Washington State With Changes in Traffic Fatalities, 2005-2017
Julian Santaella-Tenorio, et al. JAMA Internal Medicine, June 2020.Marijuana Decriminalization, Medical Marijuana Laws, and Fatal Traffic Crashes in US Cities, 2010–2017
Amanda Cook, Gregory Leung and Rhet A. Smith. American Journal of Public Health, February 2020.Cannabis Use in Older Drivers in Colorado: The LongROAD Study
Carolyn G. DiGuiseppi, et al. Accident Analysis & Prevention, November 2019.Crash Fatality Rates After Recreational Marijuana Legalization in Washington and Colorado
Jayson D. Aydelotte, et al. American Journal of Public Health, August 2017.Marijuana-Impaired Driving: A Report to Congress
National Highway Traffic Safety Administration, July 2017Interaction of Marijuana And Alcohol on Fatal Motor Vehicle Crash Risk: A Case–Control Study
Stanford Chihuri, Guohua Li and Qixuan Chen. Injury Epidemiology, March 2017.US Traffic Fatalities, 1985–2014, and Their Relationship to Medical Marijuana Laws
Julian Santaella-Tenorio, et al. American Journal of Public Health, February 2017.Delays in DUI Blood Testing: Impact on Cannabis DUI Assessments
Ed Wood, Ashley Brooks-Russell and Phillip Drum. Traffic Injury Prevention, June 2015.Establishing Legal Limits for Driving Under the Influence of Marijuana
Kristin Wong, Joanne E. Brady and Guohua Li. Injury Epidemiology, October 2014.Cannabis Effects on Driving Skills
Rebecca L. Hartman and Marilyn A. Huestis. Clinical Chemistry, March 2014.Acute Cannabis Consumption And Motor Vehicle Collision Risk: Systematic Review of Observational Studies and Meta-Analysis
Mark Asbridge, Jill A. Hayden and Jennifer L. Cartwright. The BMJ, February 2012.Resources for your audiences
The following resources include explainers from federal agencies and national organizations. You’re free to use images and graphics from federal agencies.
- CDC’s main marijuana page.
- CDC’s marijuana data and statistics.
- Marijuana Drug Facts from the National Institute on Drug Abuse.
- Health Effects of Marijuana from the CDC.
- Learn About Marijuana Risks from the Substance Abuse and Mental Health Services Administration.
- Marijuana and Lung Health from the American Lung Association.
- Substance Use Disorder 101 from the U.S. Department of Health & Human Services.
- What You Need To Know About Marijuana Use and Driving from the CDC.
- Does marijuana use affect driving? from the National Institute on Drug Abuse.
- Drug-Impaired Driving from the National Highway Traffic Safety Administration.
This article first appeared on The Journalist’s Resource and is republished here under a Creative Commons license.
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America Worries About Health Costs — And Voters Want to Hear From Biden and Republicans
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President Joe Biden is counting on outrage over abortion restrictions to help drive turnout for his reelection. Former President Donald Trump is promising to take another swing at repealing Obamacare.
But around America’s kitchen tables, those are hardly the only health topics voters want to hear about in the 2024 campaigns. A new KFF tracking poll shows that health care tops the list of basic expenses Americans worry about — more than gas, food, and rent. Nearly 3 in 4 adults — and majorities of both parties — say they’re concerned about paying for unexpected medical bills and other health costs.
“Absolutely health care is something on my mind,” Rob Werner, 64, of Concord, New Hampshire, said in an interview at a local coffee shop in January. He’s a Biden supporter and said he wants to make sure the Affordable Care Act, also known as Obamacare, is retained and that there’s more of an effort to control health care costs.
The presidential election is likely to turn on the simple question of whether Americans want Trump back in the White House. (Nikki Haley, the former South Carolina governor and U.S. ambassador to the United Nations, remained in the race for the Republican nomination ahead of Super Tuesday, though she had lost the first four primary contests.) And neither major party is basing their campaigns on health care promises.
But in the KFF poll, 80% of adults said they think it’s “very important” to hear presidential candidates talk about what they’d do to address health care costs — a subject congressional and state-level candidates can also expect to address.
“People are most concerned about out-of-pocket expenses for health care, and rightly so,” said Andrea Ducas, vice president of health policy at the Center for American Progress, a Washington, D.C.-based progressive think tank.
Here’s a look at the major health care issues that could help determine who wins in November.
Abortion
Less than two years after the Supreme Court overturned the constitutional right to an abortion, it is shaping up to be the biggest health issue in this election.
That was also the case in the 2022 midterm elections, when many voters rallied behind candidates who supported abortion rights and bolstered Democrats to an unexpectedly strong showing. Since the Supreme Court’s decision, voters in six states — including Kansas, Kentucky, and Ohio, where Republicans control the legislatures — have approved state constitutional amendments protecting abortion access.
Polls show that abortion is a key issue to some voters, said Robert Blendon, a public opinion researcher and professor emeritus at the Harvard T.H. Chan School of Public Health. He said up to 30% across the board see it as a “personal” issue, rather than policy — and most of those support abortion rights.
“That’s a lot of voters, if they show up and vote,” Blendon said.
Proposals to further protect — or restrict — abortion access could drive voter turnout. Advocates are working to put abortion-related measures on the ballot in such states as Arizona, Florida, Missouri, and South Dakota this November. A push in Washington toward a nationwide abortion policy could also draw more voters to the polls, Blendon said.
A surprise ruling by the Alabama Supreme Court in February that frozen embryos are children could also shake up the election. It’s an issue that divides even the anti-abortion community, with some who believe that a fertilized egg is a unique new person deserving of full legal rights and protections, and others believing that discarding unused embryos as part of the in vitro fertilization process is a morally acceptable way for couples to have children.
Pricey Prescriptions
Drug costs regularly rank high among voters’ concerns.
In the latest tracking poll, more than half — 55% — said they were very worried about being able to afford prescription drugs.
Biden has tried to address the price of drugs, though his efforts haven’t registered with many voters. While its name doesn’t suggest landmark health policy, the Inflation Reduction Act, or IRA, which the president signed in August 2022, included a provision allowing Medicare to negotiate prices for some of the most expensive drugs. It also capped total out-of-pocket spending for prescription drugs for all Medicare patients, while capping the price of insulin for those with diabetes at $35 a month — a limit some drugmakers have extended to patients with other kinds of insurance.
Drugmakers are fighting the Medicare price negotiation provision in court. Republicans have promised to repeal the IRA, arguing that forcing drugmakers to negotiate lower prices on drugs for Medicare beneficiaries would amount to price controls and stifle innovation. The party has offered no specific alternative, with the GOP-led House focused primarily on targeting pharmacy benefit managers, the arbitrators who control most Americans’ insurance coverage for medicines.
Costs of Coverage
Health care costs continue to rise for many Americans. The cost of employer-sponsored health plans have hit new highs in the past few months, raising costs for employers and workers alike. Experts have attributed the increase to high demand and expensive prices for certain drugs and treatments, notably weight loss drugs, as well as to medical inflation.
Meanwhile, the ACA is popular. The KFF poll found that more adults want to see the program expanded than scaled back. And a record 21.3 million people signed up for coverage in 2024, about 5 million of them new customers.
Enrollment in Republican-dominated states has grown fastest, with year-over-year increases of 80% in West Virginia, nearly 76% in Louisiana, and 62% in Ohio, according to the Centers for Medicare & Medicaid Services.
Public support for Obamacare and record enrollment in its coverage have made it politically perilous for Republicans to pursue the law’s repeal, especially without a robust alternative. That hasn’t stopped Trump from raising that prospect on the campaign trail, though it’s hard to find any other Republican candidate willing to step out on the same limb.
“The more he talks about it, the more other candidates have to start answering for it,” said Jarrett Lewis, a partner at Public Opinion Strategies, a GOP polling firm.
“Will a conversation about repeal-and-replace resonate with suburban women in Maricopa County?” he said, referring to the populous county in Arizona known for being a political bellwether. “I would steer clear of that if I was a candidate.”
Biden and his campaign have pounced on Trump’s talk of repeal. The president has said he wants to make permanent the enhanced premium subsidies he signed into law during the pandemic that are credited with helping to increase enrollment.
Republican advisers generally recommend that their candidates promote “a market-based system that has the consumer much more engaged,” said Lewis, citing short-term insurance plans as an example. “In the minds of Republicans, there is a pool of people that this would benefit. It may not be beneficial for everyone, but attractive to some.”
Biden and his allies have criticized short-term insurance plans — which Trump made more widely available — as “junk insurance” that doesn’t cover care for serious conditions or illnesses.
Entitlements Are Off-Limits
Both Medicaid and Medicare, the government health insurance programs that cover tens of millions of low-income, disabled, and older people, remain broadly popular with voters, said the Democratic pollster Celinda Lake. That makes it unlikely either party would pursue a platform that includes outright cuts to entitlements. But accusing an opponent of wanting to slash Medicare is a common, and often effective, campaign move.
Although Trump has said he wouldn’t cut Medicare spending, Democrats will likely seek to associate him with other Republicans who support constraining the program’s costs. Polls show that most voters oppose reducing any Medicare benefits, including by raising Medicare’s eligibility age from 65. However, raising taxes on people making more than $400,000 a year to shore up Medicare’s finances is one idea that won strong backing in a recent poll by The Associated Press and NORC Center for Public Affairs Research.
Brian Blase, a former Trump health adviser and the president of Paragon Health Institute, said Republicans, if they win more control of the federal government, should seek to lower spending on Medicare Advantage — through which commercial insurers provide benefits — to build on the program’s efficiencies and ensure it costs taxpayers less than the traditional program.
So far, though, Republicans, including Trump, have expressed little interest in such a plan. Some of them are clear-eyed about the perils of running on changing Medicare, which cost $829 billion in 2021 and is projected to consume nearly 18% of the federal budget by 2032.
“It’s difficult to have a frank conversation with voters about the future of the Medicare program,” said Lewis, the GOP pollster. “More often than not, it backfires. That conversation will have to happen right after a major election.”
Addiction Crisis
Many Americans have been touched by the growing opioid epidemic, which killed more than 112,000 people in the United States in 2023 — more than gun deaths and road fatalities combined. Rural residents and white adults are among the hardest hit.
Federal health officials have cited drug overdose deaths as a primary cause of the recent drop in U.S. life expectancy.
Republicans cast addiction as largely a criminal matter, associating it closely with the migration crisis at the U.S. southern border that they blame on Biden. Democrats have sought more funding for treatment and prevention of substance use disorders.
“This affects the family, the neighborhood,” said Blendon, the public opinion researcher.
Billions of dollars have begun to flow to states and local governments from legal settlements with opioid manufacturers and retailers, raising questions about how to best spend that money. But it isn’t clear that the crisis, outside the context of immigration, will emerge as a campaign issue.
KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.
Subscribe to KFF Health News’ free Morning Briefing.
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Natto, Taurine + Black Pepper, And Other Game-Changers
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It’s Q&A Day at 10almonds!
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In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
❝Loved the info on nuts; of course I always eat pecans, which didn’t make the list of healthy nuts!❞
Dear subscriber, pardon the paraphrase of your comment—somehow it got deleted and now exists only in this writer’s memory. However, to address it:
Pecans are great too! We can’t include everything in every article (indeed, we got another feedback the same day saying the article was too long), but we love when you come to us with stuff for us to look at and write about (seriously, writer here: the more you ask, the easier it makes my job), so let’s talk pecans for a moment:
Pecans would have been number six on our list if we’d have written more!
Like many nuts, they’ve an abundance of healthy fats, fiber, vitamins, and minerals.
They’re particularly good for zinc, which is vital for immune function, healing (including normal recovery after normal exercise), and DNA synthesis (so: anti-aging).
Pecans are also great for reducing LDL (“bad” cholesterol) and triglycerides (which are also bad for heart health); check it out:
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Staring At The Sun – by Dr. Irvin Yalom
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A quick note first: there are two editions of this book; the content is the same, but the cover is different. So if in your region it has a bright yellow cover and the subtitle is the excitable “Overcoming The Terror Of Death” rather than the more measured “Being At Peace With Your Own Mortality”, that is why; different regional publishers made different choices.
For most of us, dying is the last thing we want to do. We may fear it; we may ignore it; we may try to beat it—but it’s a constant existential threat whether we want it or not.
This book is about “death anxiety”, either direct (conscious fear of impending death) or sublimated (not necessarily realising what we’re avoiding thinking about it). In its broadest sense, the fear of death can be described as rational. But angst about it probably won’t help, so this book looks to help us overcome that.
The style of the book is largely anecdotal, in which the author uses examples from his therapeutic practice to illustrate ways in which the fear of death can manifest, and ways in which it can be managed healthily.
Subjective criticism: while this author developed existential therapy, many of the ideas in this book lean heavily on the psychodynamic approach derived from Freud, and this reviewer isn’t a fan of that. But nevertheless, many of the examples here are thought-provoking and useful, so it is not too strong a criticism.
Bottom line: there are many ways to manage one’s mortality, and this book brings attention to a range of possibilities.
Click here to check out Staring At The Sun, and manage your mortality!
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