Which Sugars Are Healthier, And Which Are Just The Same?
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From Apples to Bees, and High-Fructose Cs
We asked you for your (health-related) policy on sugar. The trends were as follows:
- About half of all respondents voted for “I try to limit sugar intake, but struggle because it’s in everything”
- About a quarter of all respondents voted for “Refined sugar is terrible; natural sugars (e.g. honey, agave) are fine”
- About a quarter of all respondents voted for “Sugar is sugar and sugar is bad; I avoid it entirely”
- One (1) respondent voted for “Sugar is an important source of energy, so I consume plenty”
Writer’s note: I always forget to vote in these, but I’d have voted for “I try to limit sugar intake, but struggle because it’s in everything”.
Sometimes I would like to make my own [whatever] to not have the sugar, but it takes so much more time, and often money too.
So while I make most things from scratch (and typically spend about an hour cooking each day), sometimes store-bought is the regretfully practical timesaver/moneysaver (especially when it comes to condiments).
So, where does the science stand?
There has, of course, been a lot of research into the health impact of sugar.
Unfortunately, a lot of it has been funded by sugar companies, which has not helped. Conversely, there are also studies funded by other institutions with other agendas to push, and some of them will seek to make sugar out to be worse than it is.
So for today’s mythbusting overview, we’ve done our best to quality-control studies for not having financial conflicts of interest. And of course, the usual considerations of favoring high quality studies where possible Large sample sizes, good method, human subjects, that sort of thing.
Sugar is sugar and sugar is bad: True or False?
False and True, respectively.
- Sucrose is sucrose, and is generally bad.
- Fructose is fructose, and is worse.
Both ultimately get converted into glycogen (if not used immediately for energy), but for fructose, this happens mostly* in the liver, which a) taxes it b) goes very unregulated by the pancreas, causing potentially dangerous blood sugar spikes.
This has several interesting effects:
- Because fructose doesn’t directly affect insulin levels, it doesn’t cause insulin insensitivity (yay)
- Because fructose doesn’t directly affect insulin levels, this leaves hyperglycemia untreated (oh dear)
- Because fructose is metabolized by the liver and converted to glycogen which is stored there, it’s one of the main contributors to non-alcoholic fatty liver disease (at this point, we’re retracting our “yay”)
Read more: Fructose and sugar: a major mediator of non-alcoholic fatty liver disease
*”Mostly” in the liver being about 80% in the liver. The remaining 20%ish is processed by the kidneys, where it contributes to kidney stones instead. So, still not fabulous.
Fructose is very bad, so we shouldn’t eat too much fruit: True or False?
False! Fruit is really not the bad guy here. Fruit is good for you!
Fruit does contain fructose yes, but not actually that much in the grand scheme of things, and moreover, fruit contains (unless you have done something unnatural to it) plenty of fiber, which mitigates the impact of the fructose.
- A medium-sized apple (one of the most sugary fruits there is) might contain around 11g of fructose
- A tablespoon of high-fructose corn syrup can have about 27g of fructose (plus about 3g glucose)
Read more about it: Effects of high-fructose (90%) corn syrup on plasma glucose, insulin, and C-peptide in non-insulin-dependent diabetes mellitus and normal subjects
However! The fiber content (in fruit) mitigates the impact of the fructose almost entirely anyway.
And if you take fruits that are high in sugar and/but high in polyphenols, like berries, they now have a considerable net positive impact on glycemic health:
- Polyphenols and Glycemic Control
- Polyphenols and their effects on diabetes management: A review
- Dietary polyphenols as antidiabetic agents: Advances and opportunities
You may be wondering: what was that about “unless you have done something unnatural to it”?
That’s mostly about juicing. Juicing removes much (or all) of the fiber, and if you do that, you’re basically back to shooting fructose into your veins:
- Effect of Fruit Juice on Glucose Control and Insulin Sensitivity in Adults: A Meta-Analysis of 12 Randomized Controlled Trials
- Intake of Fruit, Vegetables, and Fruit Juices and Risk of Diabetes in Women
Natural sugars like honey, agave, and maple syrup, are healthier than refined sugars: True or False?
True… Sometimes, and sometimes marginally.
This is partly because of the glycemic index and glycemic load. The glycemic index scores tail off thus:
- table sugar = 65
- maple syrup = 54
- honey = 46
- agave syrup = 15
So, that’s a big difference there between agave syrup and maple syrup, for example… But it might not matter if you’re using a very small amount, which means it may have a high glycemic index but a low glycemic load.
Note, incidentally, that table sugar, sucrose, is a disaccharide, and is 50% glucose and 50% fructose.
The other more marginal health benefits come from that fact that natural sugars are usually found in foods high in other nutrients. Maple syrup is very high in manganese, for example, and also a fair source of other minerals.
But… Because of its GI, you really don’t want to be relying on it for your nutrients.
Wait, why is sugar bad again?
We’ve been covering mostly the more “mythbusting” aspects of different forms of sugar, rather than the less controversial harms it does, but let’s give at least a cursory nod to the health risks of sugar overall:
- Obesity and associated metabolic risk
- Main contributor to non-alcoholic fatty liver disease
- Increased risk of heart disease
- Insulin resistance and diabetes risk
- Cellular aging (shortened telomeres)
- 95% increased cancer risk
That last one, by the way, was a huge systematic review of 37 large longitudinal cohort studies. Results varied depending on what, specifically, was being examined (e.g. total sugar, fructose content, sugary beverages, etc), and gave up to 200% increased cancer risk in some studies on sugary beverages, but 95% increased risk is a respectable example figure to cite here, pertaining to added sugars in foods.
And finally…
The 56 Most Common Names for Sugar (Some Are Tricky)
How many did you know?
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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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10almonds Subcribers Take The Wheel!
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❓ Q&A With 10almonds Subscribers!
Q: What kind of salt is best for neti pots?
A: Non-iodised salt is usually recommended, but really, any human-safe salt is fine. By this we mean for example:
- Sodium chloride (like most kitchen salts),
- Potassium chloride (as found in “reduced sodium” kitchen salts), or
- Magnesium sulfate (also known as epsom salts).
Q: You talked about spearmint as reducing testosterone levels, what about ginseng for increasing them?
A: Hormones are complicated and often it’s not a simple matter of higher or lower levels! It can also be a matter of…
- how your body converts one thing into another
- how your body responds (or not) to something according to how the relevant hormone’s receptors are doing
- …and whether there’s anything else blocking those receptors.
All this to say: spearmint categorically is an anti-androgen, but the mechanism of action remains uncertain.
Panax ginseng, meanwhile, is one of the most well-established mysteries in herbal medicine.
Paradoxically, it seems to improve both male and female hormonal regulation, despite being more commonly associated with the former.
- It doesn’t necessarily increase or decrease testosterone or estrogen levels (but it can, even if indirectly)
- It does improve sexual function
- …and alleviates symptoms associated with conditions as varied as:
- Late-onset hypogonadism (common for men during the andropause)
- Benign prostate hyperplasia (again common for men during the andropause)
- …and also counteracts unwanted side-effects of finasteride. Finasteride is often taken by men as a hair loss remedy or, less often but critically, in the case of an enlarged prostate.
But it also…
- Alleviates symptoms of PCOS (polycystic ovary syndrome, which effects around 20% of women)
- May even be an effective treatment for PCOS (rat model only so far)
- It also may improve female reproductive fertility more generally (the studies are down to fruit flies now though)
Bottom line: Panax ginseng is popularly taken to improve natural hormone function, a task at which it appears to excel.
Scientists are still working out exactly how it does the many things it appears to do.
Progress has been made, and it clearly is science rather than witchcraft, but there are still far more unanswered questions than resolved ones!
Q: I like that the quizzes (I’ve done two so far) give immediate results , with no “give us your email to get your results”. Thanks!
A: You’re welcome! That’s one of the factors that influences what things we include here! Our mission statement is “to make health and productivity crazy simple”, and the unwritten part of that is making sure to save your time and energy wherever we reasonably can!
Q: Do you know if adrafanil is as good as modafinil? It seems to be a lot cheaper for the same result?
A: Adrafinil is the pro-drug of modafinil. What this means is that if you take it, your own liver will use it to make modafinil inside you. So the end result is chemically the same drug.
As to whether it’s as good, it depends what you need. It’s worth noting that anything that taxes liver function can be harmful if you take too much, and/or your liver is already strained for some reason.
If in doubt, consult a doctor! And if it’s something that’s accessible to you, a recent lipids test (a kind of blood test that checks your liver health) is always a good thing to have.
Q: Would love to see your take on polyphasic sleep!
A: Watch this space
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Non-Sleep Deep Rest: A Neurobiologist’s Take
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How to get many benefits of sleep, while awake!
Today we’re talking about Dr. Andrew Huberman, a neuroscientist and professor in the department of neurobiology at Stanford School of Medicine.
He’s also a popular podcaster, and as his Wikipedia page notes:
❝In episodes lasting several hours, Huberman talks about the state of research in a specific topic, both within and outside his specialty❞
Today, we won’t be taking hours, and we will be taking notes from within his field of specialty (neurobiology). Specifically, in this case:
Non-Sleep Deep Rest (NSDR)
What is it? To quote from his own dedicated site on the topic:
❝What is NSDR (Yoga Nidra)? Non-Sleep Deep Rest, also known as NSDR, is a method of deep relaxation developed by Dr. Andrew Huberman, a neuroscientist at Stanford University School of Medicine.
It’s a process that combines controlled breathing and detailed body scanning to bring you into a state of heightened awareness and profound relaxation. The main purpose of NSDR is to reduce stress, enhance focus, and improve overall well-being.❞
While it seems a bit bold of Dr. Huberman to claim that he developed yoga nidra, it is nevertheless reassuring to get a neurobiologist’s view on this:
How it works, by science
Dr. Huberman says that by monitoring EEG readings during NSDR, we can see how the brain slows down. Measurably!
- It goes from an active beta range of 13–30 Hz (normal waking) to a conscious meditation state of an alpha range of 8–13 Hz.
- However, with practice, it can drop further, into a theta range of 4–8 Hz.
- Ultimately, sustained SSDR practice can get us to 0.5–3 Hz.
This means that the brain is functioning in the delta range, something that typically only occurs during our deepest sleep.
You may be wondering: why is delta lower than theta? That’s not how I remember the Greek alphabet being ordered!
Indeed, while the Greek alphabet goes alpha beta gamma delta epsilon zeta eta theta (and so on), the brainwave frequency bands are:
- Gamma = concentrated focus, >30 Hz
- Beta = normal waking, 13–30 Hz
- Alpha = relaxed state, 8–13 Hz
- Theta = light sleep, 4–8 Hz
- Delta = deep sleep, 1–4 Hz
Source: Sleep Foundation ← with a nice infographic there too
NSDR uses somatic cues to engage our parasympathetic nervous system, which in turn enables us to reach those states. The steps are simple:
- Pick a time and place when you won’t be disturbed
- Lie on your back and make yourself comfortable
- Close your eyes as soon as you wish, and now that you’ve closed them, imagine closing them again. And again.
- Slowly bring your attention to each part of your body in turn, from head to toe. As your attention goes to each part, allow it to relax more.
- If you wish, you can repeat this process for another wave, or even a third.
- Find yourself well-rested!
Note: this engagement of the parasympathetic nervous system and slowing down of brain activity accesses restorative states not normally available while waking, but 10 minutes of NSDR will not replace 7–9 hours of sleep; nor will it give you the vital benefits of REM sleep specifically.
So: it’s an adjunct, not a replacement
Want to try it, but not sure where/how to start?
When you’re ready, let Dr. Huberman himself guide you through it in this shortish (10:49) soundtrack:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to try it, but not right now? Bookmark it for later
Take care!
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Managing Your Mortality
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When Planning Is a Matter of Life and Death
Barring medical marvels as yet unrevealed, we are all going to die. We try to keep ourselves and our loved ones in good health, but it’s important to be prepared for the eventuality of death.
While this is not a cheerful topic, considering these things in advance can help us manage a very difficult thing, when the time comes.
We’ve put this under “Psychology Sunday” as it pertains to processing our own mortality, and managing our own experiences and the subsequent grief that our death may invoke in our loved ones.
We’ll also be looking at some of the medical considerations around end-of-life care, though.
Organizational considerations
It’s generally considered good to make preparations in advance. Write (or update) a Will, tie up any loose ends, decide on funerary preferences, perhaps even make arrangements with pre-funding. Life insurance, something difficult to get at a good rate towards the likely end of one’s life, is better sorted out sooner rather than later, too.
Beyond bureaucracy
What’s important to you, to have done before you die? It could be a bucket list, or it could just be to finish writing that book. It could be to heal a family rift, or to tell someone how you feel.
It could be more general, less concrete: perhaps to spend more time with your family, or to engage more with a spiritual practice that’s important to you.
Perhaps you want to do what you can to offset the grief of those you’ll leave behind; to make sure there are happy memories, or to make any requests of how they might remember you.
Lest this latter seem selfish: after a loved one dies, those who are left behind are often given to wonder: what would they have wanted? If you tell them now, they’ll know, and can be comforted and reassured by that.
This could range from “bright colors at my funeral, please” to “you have my blessing to remarry if you want to” to “I will now tell you the secret recipe for my famous bouillabaisse, for you to pass down in turn”.
End-of-life care
Increasingly few people die at home.
- Sometimes it will be a matter of fighting tooth-and-nail to beat a said-to-be-terminal illness, and thus expiring in hospital after a long battle.
- Sometimes it will be a matter of gradually winding down in a nursing home, receiving medical support to the end.
- Sometimes, on the other hand, people will prefer to return home, and do so.
Whatever your preferences, planning for them in advance is sensible—especially as money may be a factor later.
Not to go too much back to bureaucracy, but you might also want to consider a Living Will, to be enacted in the case that cognitive decline means you cannot advocate for yourself later.
Laws vary from place to place, so you’ll want to discuss this with a lawyer, but to give an idea of the kinds of things to consider:
National Institute on Aging: Preparing A Living Will
Palliative care
Palliative care is a subcategory of end-of-life care, and is what occurs when no further attempts are made to extend life, and instead, the only remaining goal is to reduce suffering.
In the case of some diseases including cancer, this may mean coming off treatments that have unpleasant side-effects, and retaining—or commencing—pain-relief treatments that may, as a side-effect, shorten life.
Euthanasia
Legality of euthanasia varies from place to place, and in some times and places, palliative care itself has been considered a form of “passive euthanasia”, that is to say, not taking an active step to end life, but abstaining from a treatment that prolongs it.
Clearer forms of passive euthanasia include stopping taking a medication without which one categorically will die, or turning off a life support machine.
Active euthanasia, taking a positive action to end life, is legal in some places and the means varies, but an overdose of barbiturates is an example; one goes to sleep and does not wake up.
It’s not the only method, though; options include benzodiazepines, and opioids, amongst others:
Efficacy and safety of drugs used for assisted dying
Unspoken euthanasia
An important thing to be aware of (whatever your views on euthanasia) is the principle of double-effect… And how it comes to play in palliative care more often than most people think.
Say a person is dying of cancer. They opt for palliative care; they desist in any further cancer treatments, and take medication for the pain. Morphine is common. Morphine also shortens life.
It’s common for such a patient to have a degree of control over their own medication, however, after a certain point, they will no longer be in sufficient condition to do so.
After this point, it is very common for caregivers (be they medical professionals or family members) to give more morphine—for the purpose of reducing suffering, of course, not to kill them.
In practical terms, this often means that the patient will die quite promptly afterwards. This is one of the reasons why, after sometimes a long-drawn-out period of “this person is dying”, healthcare workers can be very accurate about “it’s going to be in the next couple of days”.
The take-away from this section is: if you would like for this to not happen to you or your loved one, you need to be aware of this practice in advance, because while it’s not the kind of thing that tends to make its way into written hospital/hospice policies, it is very widespread and normalized in the industry on a human level.
Further reading: Goods, causes and intentions: problems with applying the doctrine of double effect to palliative sedation
One last thing…
Planning around our own mortality is never a task that seems pressing, until it’s too late. We recommend doing it anyway, without putting it off, because we can never know what’s around the corner.
Don’t Forget…
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Wildfires ignite infection risks, by weakening the body’s immune defences and spreading bugs in smoke
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Over the past several days, the world has watched on in shock as wildfires have devastated large parts of Los Angeles.
Beyond the obvious destruction – to landscapes, homes, businesses and more – fires at this scale have far-reaching effects on communities. A number of these concern human health.
We know fire can harm directly, causing injuries and death. Tragically, the death toll in LA is now at least 24.
But wildfires, or bushfires, can also have indirect consequences for human health. In particular, they can promote the incidence and spread of a range of infections.
Effects on the immune system
Most people appreciate that fires can cause burns and smoke inhalation, both of which can be life-threatening in their own right.
What’s perhaps less well known is that both burns and smoke inhalation can cause acute and chronic changes in the immune system. This can leave those affected vulnerable to infections at the time of the injury, and for years to come.
Burns induce profound changes in the immune system. Some parts go into overdrive, becoming too reactive and leading to hyper-inflammation. In the immediate aftermath of serious burns, this can contribute to sepsis and organ failure.
Other parts of the immune system appear to be suppressed. Our ability to recognise and fight off bugs can be compromised after sustaining burns. Research shows people who have experienced serious burns have an increased risk of influenza, pneumonia and other types of respiratory infections for at least the first five years after injury compared to people who haven’t experienced burns.
Wildfire smoke is a complex mixture containing particulate matter, volatile organic compounds, ozone, toxic gases, and microbes. When people inhale smoke during wildfires, each of these elements can play a role in increasing inflammation in the airways, which can lead to increased susceptibility to respiratory infections and asthma.
Research published after Australia’s Black Summer of 2019–20 found a higher risk of COVID infections in areas of New South Wales where bushfires had occurred weeks earlier.
We need more research to understand the magnitude of these increased risks, how long they persist after exposure, and the mechanisms. But these effects are thought to be due to sustained changes to the immune response.
Microbes travel in smoky air
Another opportunity for infection arises from the fire-induced movement of microbes from niches they usually occupy in soils and plants in natural areas, into densely populated urban areas.
Recent evidence from forest fires in Utah shows microbes, such as bacteria and fungal spores, can be transported in smoke. These microbes are associated with particles from the source, such as burned vegetation and soil.
There are thousands of different species of microbes in smoke, many of which are not common in background, non-smoky air.
Only a small number of studies on this have been published so far, but researchers have shown the majority of microbes in smoke are still alive and remain alive in smoke long enough to colonise the places where they eventually land.
How far specific microbes can be transported remains an open question, but fungi associated with smoke particles have been detected hundreds of miles downwind from wildfires, even weeks after the fire.
So does this cause human infections?
A subset of these airborne microbes are known to cause infections in humans.
Scientists are probing records of human fungal infections in relation to wildfire smoke exposure. In particular, they’re looking at soil-borne infectious agents such as the fungi Coccidioides immitis and Coccidioides posadasii which thrive in dry soils that can be picked up in dust and smoke plumes.
These fungi cause valley fever, a lung infection with symptoms that can resemble the flu, across arid western parts of the United States.
A study of wildland firefighters in California showed high rates of valley fever infections, which spurred occupational health warnings including recommended use of respirators when in endemic regions.
A California-based study of the wider population showed a 20% increase in hospital admissions for valley fever following any amount of exposure to wildfire smoke.
However, another found only limited evidence of excess cases after smoke exposure in wildfire-adjacent populations in California’s San Joaquin Valley.
These contrasting results show more research is needed to evaluate the infectious potential of wildfire smoke from this and other fungal and bacterial causes.
Staying safe
Much remains to be learned about the links between wildfires and infections, and the multiple pathways by which wildfires can increase the risk of certain infections.
There’s also a risk people gathering together after a disaster like this, such as in potentially overcrowded shelters, can increase the transmission of infections. We’ve seen this happen after previous natural disasters.
Despite the gaps in our knowledge, public health responses to wildfires should encompass infection prevention (such as through the provision of effective masks) and surveillance to enable early detection and effective management of any outbreaks.
Christine Carson, Senior Research Fellow, School of Medicine, The University of Western Australia and Leda Kobziar, Professor of Wildland Fire Science, University of Idaho
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Master Your Core – by Dr. Bohdanna Zazulak
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In the category of “washboard abs”, this one isn’t particularly interested in how much or how little fat you have. What it’s more interested in is a strong, resilient, and stable core. Including your abs yes, but also glutes, hips, and back.
Nor is the focus on superhuman feats of strength, though certainly one could use these exercises to work towards that. Rather, here we see importance placed on functional performance, mobility, and stability.
Lest mobility and stability seem at odds with each other, understand:
- By mobility we mean the range of movement we are able to accomplish.
- By stability, we mean that any movement we make is intentional, and not because we lost our balance.
Functional performance, meanwhile, is a function of those two things, plus strength.
How does the book deliver on this?
There are exercises to do. Exercises of the athletic kind you might expect, and also exercises including breathing exercises, which gets quite a bit of attention too. Not just “do abdominal breathing”, but quite an in-depth examination of such. There are also habits to form, and lifestyle tweaks to make.
Of course, you don’t have to do all the things she suggests. The more you do, the better results you are likely to get, but if you adopt even some of the practices she recommends, you’re likely to see some benefits. And, perhaps most importantly, reduce age-related loss of mobility, stability, and strength.
Bottom line: a great all-rounder book of core strength, mobility, and stability.
Click here to check out Master Your Core and enjoy the more robust health that comes with it!
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