Eyes for Alzheimer’s Diagnosis: New?
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It’s Q&A Time!
This is the bit whereby each week, we respond to subscriber questions/requests/etc
Have something you’d like to ask us, or ask us to look into? Hit reply to any of our emails, or use the feedback widget at the bottom, and a Real Human™ will be glad to read it!
Q: As I am a retired nurse, I am always interested in new medical technology and new ways of diagnosing. I have recently heard of using the eyes to diagnose Alzheimer’s. When I did some research I didn’t find too much. I am thinking the information may be too new or I wasn’t on the right sites.
(this is in response to last week’s piece on lutein, eyes, and brain health)
We’d readily bet that the diagnostic criteria has to do with recording low levels of lutein in the eye (discernible by a visual examination of macular pigment optical density), and relying on the correlation between this and incidence of Alzheimer’s, but we’ve not seen it as a hard diagnostic tool as yet either—we’ll do some digging and let you know what we find! In the meantime, we note that the Journal of Alzheimer’s Disease (which may be of interest to you, if you’re not already subscribed) is onto this:
See also:
- Journal of Alzheimer’s Disease (mixture of free and paid content)
- Journal of Alzheimer’s Disease Reports (open access—all content is free)
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Using the”Task Zero” approach
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“Jonathan Frakes Asks You Things” Voice:
- Do you ever find yourself in a room and wonder what you’re doing there?
- Or set about a to-do list, but get quickly distracted by side-quests?
- Finally get through to a person in a call center, they ask how they can help, and your mind goes blank?
- Go to the supermarket and come out with six things, none of which were the one you came for?
This is a “working memory” thing and you’re not alone. There’s a trick that can help keep you on track more often than not:
Don’t try to overburden your working memory. It is very limited (this goes for everyone to a greater or lesser degree). Instead, hold only two tasks at once:
- Task zero (what you are doing right now)
- Task one (your next task)
When you’ve completed task zero, task one becomes the new task zero, and you can populate a new task one from your to-do list.
This way, you will always know what you’re doing right now, and what you’re doing next, and your focus will be so intent on task zero, that you will not get sidetracked by task seventeen!
Happy focusing
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Eat To Beat Chronic Fatigue!
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How To Eat To Beat Chronic Fatigue
Chronic fatigue is on the rise, and it can make life a living Hell. Days blur into one, and you try to take each day as it comes, but sometimes several days gang up on you at once.
You probably know some lifestyle changes that might help—if only you had the energy to implement them.
You’d like to eat well, but you need to…
- Buy the fresh produce (and take a little rest after)
- Put the groceries away (and take a little rest after)
- Wash the vegetables (and take a little rest after)
- Chop the things as necessary (and take a little rest after)
- Cook dinner (and take a little rest after)
…and now you’re too exhausted to eat it.
So, what can be done?
First, avoid things that cause inflammation, as this is a major contributor to chronic fatigue. You might like our previous main feature:
Next up, really do stay hydrated. It’s less about quantity, and more about ubiquity. Hydrate often.
Best is if you always have some (hydrating) drink on the go.
Do experiment with your diet, and/but keep a food journal of what you eat and how you feel 30–60 minutes after eating it. Only make one change at a time, otherwise you won’t know which change made the difference.
Notice what patterns emerge over time, and adjust your ingredients accordingly.
Limit your caffeine intake. We know that sometimes it seems like the only way to get through the day, but you will always crash later, because it was only ever taxing your adrenal system (thus: making you more tired in the long run) and pulling the wool over the eyes of your adenosine receptors (blocking you from feeling how tired you are, but not actually reducing your body’s tiredness).
Put simply, caffeine is the “payday loan” of energy.
Eat more non-starchy vegetables, and enjoy healthy fats. Those healthy fats can come from nuts and seeds, avocado, or fish (not fried, though!).
The non-starchy vegetables will boost your vitamins and fiber while being easy on your beleaguered metabolism, while the healthy fats will perk up your energy levels without spiking insulin like sugars would.
Pay the fatigue tax up front. What this means is… Instead of throwing away vegetables that didn’t get used because it would take too much effort and you just need an easier dinner today, buy ready-chopped vegetables, for example.
And if you buy vegetables frozen, they’re also often not only cheaper, but also (counterintuitively) contain more nutrients.
A note of distinction:
Many more people have chronic fatigue (the symptom: being exhausted all the time) than have chronic fatigue syndrome (the illness: myalgic encephalomyelitis).
This is because fatigue can be a symptom of many, many other conditions, and can be heavily influenced by lifestyle factors too.
A lot of the advice for dealing with chronic fatigue is often the same in both cases, but some will be different, because for example:
- If your fatigue is from some other condition, that condition probably impacts what lifestyle factors you are (and are not) able to change, too
- If your fatigue is from lifestyle factors, that hopefully means you can change those and enjoy less fatigue…
- But if it’s not from lifestyle factors, as in ME/CFS, then advice to “exercise more” etc is not going to help so much.
There are ways to know the difference though:
Check out: Do You Have Chronic Fatigue Syndrome?
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Covering obesity: 6 tips for dispelling myths and avoiding stigmatizing news coverage
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When researchers looked at news coverage of obesity in the United States and the United Kingdom a few years ago, they found that images in news articles often portrayed people with larger bodies “in a stigmatizing manner” — they emphasized people’s abdomens, for example, or showed them eating junk food, wearing tight clothes or lounging in front of a TV.
When people with larger bodies were featured in photos and videos, nearly half were shown only from their necks down or with part of their heads missing, according to the analysis, published in November 2023. The researchers examined a total of 445 images posted to the websites of four U.S. news outlets and four U.K. news outlets between August 2018 and August 2019.
The findings underscore the need for dramatic changes in the way journalists report on obesity and people who weigh more than what medical authorities generally consider healthy, Rebecca Puhl, one of the paper’s authors, told The Journalist’s Resource in an email interview.
“Using images of ‘headless stomachs’ is dehumanizing and stigmatizing, as are images that depict people with larger bodies in stereotypical ways (e.g., eating junk food or being sedentary),” wrote Puhl, deputy director of the Rudd Center for Food Policy and Health at the University of Connecticut and a leading scholar on weight stigma.
She noted that news images influence how the public views and interacts with people with obesity, a complicated and often misunderstood condition that the American Medical Association considers a disease.
In the U.S., an estimated 42% of adults aged 20 years and older have obesity, a number researchers predict will rise to 50% over the next six years. While the disease isn’t as common in other parts of the planet, the World Obesity Federation projects that by 2035, more than half the global population will have obesity or overweight.
Several other studies Puhl has conducted demonstrate that biased new images can have damaging consequences for individuals affected by obesity.
“Our research has found that seeing the stigmatizing image worsens people’s attitudes and weight bias, leading them to attribute obesity to laziness, increasing their dislike of people with higher weight, and increasing desire for social distance from them,” Puhl explained.
Dozens of studies spotlight problems in news coverage of obesity in the U.S. and abroad. In addition to stigmatizing images, journalists use stigmatizing language, according to a 2022 research review in eClinicalMedicine, a journal published by The Lancet.
The research also suggests people with higher weights feel excluded and ridiculed by news outlets.
“Overt or covert discourses in news media, social media, and public health campaigns included depictions of people with overweight or obesity as being lazy, greedy, undisciplined, unhappy, unattractive, and stupid,” write the authors of the review, which examines 113 academic studies completed before Dec. 2, 2021.
To help journalists reflect on and improve their work, The Journalist’s Resource asked for advice from experts in obesity, weight stigma, health communication and sociolinguistics. They shared their thoughts and opinions, which we distilled into the six tips that appear below.
In addition to Puhl, we interviewed these six experts:
Jamy Ard, a professor of epidemiology and prevention at Wake Forest University School of Medicine and co-director of the Wake Forest Baptist Health Weight Management Center. He’s also president of The Obesity Society, a professional organization of researchers, health care providers and other obesity specialists.
Leslie Cofie, an assistant professor of health education and promotion at East Carolina University’s College of Health and Human Performance. He has studied obesity among immigrants and military veterans.
Leslie Heinberg, director of Enterprise Weight Management at the Cleveland Clinic, an academic medical center. She’s also vice chair for psychology in the Cleveland Clinic’s Center for Behavioral Health Department of Psychiatry and Psychology.
Monu Khanna, a physician in Missouri who is board certified in obesity medicine.
Jenn Lonzer, manager of the Cleveland Clinic Health Library and the co-author of several academic papers on health communication.
Cindi SturtzSreetharan, an anthropologist and professor at the Arizona State University School of Human Evolution and Social Change. She studies the language people of different cultures use to describe human bodies.
1. Familiarize yourself with recent research on what causes obesity and how obesity can affect a person’s health. Many long-held beliefs about the disease are wrong.
Journalists often report incorrect or misleading information about obesity, possibly because they’re unaware that research published in recent decades dispels many long-held beliefs about the disease, the experts say. Obesity isn’t simply the result of eating too many calories and doing too little exercise. A wide range of factors drive weight gain and prevent weight loss, many of which have nothing to do with willpower or personal choices.
Scholars have learned that stress, gut health, sleep duration and quality, genetics, medication, personal income, access to healthy foods and even climate can affect weight regulation. Prenatal and early life experiences also play a role. For example, childhood trauma such as child abuse can become “biologically embedded,” altering children’s brain structures and influencing their long-term physical and mental health, according to a 2020 research review published in the journal Physiology & Behavior.
“The causes of obesity are numerous and each individual with obesity will have a unique set of contributors to their excess weight gain,” Jamy Ard, president of The Obesity Society, wrote to The Journalist’s Resource.
The experts urge journalists to help dispel myths, correct misinformation and share new research findings. News outlets should examine their own work, which often “ignores the science and sets up situation blaming,” says Leslie Heinberg, director of Enterprise Weight Management at the Cleveland Clinic.
“So much of the media portrayal is simply ‘This is a person who eats too much and the cure is simply to eat less or cut out that food’ or something overly, overly simplistic,” Heinberg says.
Journalists need to build their knowledge of the problem before they can explain it to their audiences. Experts point out that educating policymakers, health care providers and the public about obesity is key to eliminating the stigma associated with having a larger body.
Weight stigma alone is so physically and emotionally damaging that 36 international experts issued a consensus statement in 2020 to raise awareness about it. The document, endorsed by dozens of medical and academic organizations, outlines 13 recommendations for eliminating weight bias and stigma.
Recommendation No. 5: “We call on the media to produce fair, accurate, and non-stigmatizing portrayals of obesity. A commitment from the media is needed to shift the narrative around obesity.”
2. Use person-first language — the standard among health and medical professionals for communicating about people with chronic diseases.
The experts we interviewed encourage journalists to ditch the adjectives “obese” and “overweight” because they are dehumanizing. Use person-first language, which avoids labeling people as their disease by putting the person before the disease.
Instead of saying “an obese teenager,” say “a teenager who has obesity” or “a teenager affected by obesity.” Instead of writing “overweight men,” write “men who have overweight.”
Jenn Lonzer, manager of the Cleveland Clinic Health Library, says using “overweight” as a noun might look and sound awkward at first. But it makes sense considering other diseases are treated as nouns, she notes. Journalists would not typically refer to someone in a news story as “a cancerous person,” for example. They would report that the individual has cancer.
It’s appropriate to refer to people with overweight or obesity using neutral weight terminology. Puhl wrote that she uses “people with higher body weight” or “people with high weight” and, sometimes, “people with larger bodies” in her own writing.
While the Associated Press stylebook offers no specific guidance on the use of terms such as “obese” or “overweight,” it advises against “general and often dehumanizing ‘the’ labels such as the poor, the mentally ill, the disabled, the college-educated.”
The Association of Health Care Journalists recommends person-first language when reporting on obesity. But it also advises journalists to ask sources how they would like to be characterized, provided their weight or body size is relevant to the news story.
Anthropologist Cindi SturtzSreetharan, who studies language and culture, says sources’ responses to that question should be part of the story. Some individuals might prefer to be called “fat,” “thick” or “plus-sized.”
“I would include that as a sentence in the article — to signal you’ve asked and that’s how they want to be referred to,” SturtzSreetharan says.
She encourages journalists to read how authors describe themselves in their own writing. Two books she recommends: Thick by Tressie McMillan Cottom and Heavy: An American Memoir by Kiese Laymon.
3. Carefully plan and choose the images that will accompany news stories about obesity.
Journalists need to educate themselves about stigma and screen for it when selecting images, Puhl noted. She shared these four questions that journalists should ask themselves when deciding how to show people with higher weights in photos and video.
- Does the image imply or reinforce negative stereotypes?
- Does it provide a respectful portrayal of the person?
- Who might be offended, and why?
- Can an alternative image convey the same message and eliminate possible bias?
“Even if your written piece is balanced, accurate, and respectful, a stigmatizing image can undermine your message and promote negative societal attitudes,” Puhl wrote via email.
Lonzer says newsrooms also need to do a better job incorporating images of people who have different careers, interests, education levels and lifestyles into their coverage of overweight and obesity.
“We are diverse,” says Lonzer, who has overweight. “We also have diversity in body shape and size. It’s good to have images that reflect what Americans look like.”
If you’re looking for images and b-roll videos that portray people with obesity in non-stigmatizing ways, check out the Rudd Center Media Gallery. It’s a collection of original images of people from various demographic groups that journalists can use for free in their coverage.
The Obesity Action Coalition, a nonprofit advocacy organization, also provides images. But journalists must sign up to use the OAC Bias-Free Image Gallery.
Other places to find free images: The World Obesity Image Bank, a project of the World Obesity Federation, and the Flickr account of Obesity Canada.
4. Make sure your story does not reinforce stereotypes or insinuate that overcoming obesity is simply a matter of cutting calories and doing more exercise.
“Think about the kinds of language used in the context of eating habits or physical activity, as some can reinforce shame or stereotypes,” Puhl wrote.
She suggested journalists avoid phrases such as “resisting temptations,” “cheating on a diet,” “making excuses,” “increasing self-discipline” and “lacking self-control” because they perpetuate the myth that individuals can control their weight and that the key to losing weight is eating less and moving more.
Lonzer offers this advice: As you work on stories about obesity or weight-related issues, ask yourself if you would use the same language and framing if you were reporting on someone you love.
Here are other questions for journalists to contemplate:
“Am I treating this as a complex medical condition or am I treating it as ‘Hey, lay off the French fries?’” Lonzer adds. “Am I treating someone with obesity differently than someone with another disease?”
It’s important to also keep in mind that having excess body fat does not, by itself, mean a person is unhealthy. And don’t assume everyone who has a higher weight is unhappy about it.
“Remember, not everyone with obesity is suffering,” physician Monu Khanna wrote to The Journalist’s Resource.
5. To help audiences understand how difficult it is to prevent and reduce obesity, explain that even the places people live can affect their waistlines.
When news outlets report on obesity, they often focus on weight-loss programs, surgical procedures and anti-obesity medications. But there are other important issues to cover. Experts stress the need to help the public understand how factors not ordinarily associated with weight gain or loss can influence body size.
For example, a paper published in 2018 in the American Journal of Preventive Medicine indicates adults who are regularly exposed to loud noise have a higher waist circumference than adults who are not. Research also finds that people who live in neighborhoods with sidewalks and parks are more active.
“One important suggestion I would offer to journalists is that they need to critically explore environmental factors (e.g., built environment, food deserts, neighborhood safety, etc.) that lead to disproportionately high rates of obesity among certain groups, such as low-income individuals and racial/ethnic minorities,” Leslie Cofie, an assistant professor at East Carolina University, wrote to The Journalist’s Resource.
Cofie added that moving to a new area can prompt weight changes.
“We know that immigrants generally have lower rates of obesity when they first migrate to the U.S.,” he wrote. “However, over time, their obesity rates resemble that of their U.S.-born counterparts. Hence, it is critical for journalists to learn about how the sociocultural experiences of immigrants change as they adapt to life in the U.S. For example, cultural perspectives about food, physical activities, gender roles, etc. may provide unique insights into how the pre- and post-migration experiences of immigrants ultimately contribute to the unfavorable trends in their excessive weight gain.”
Other community characteristics have been linked to larger body sizes for adults or children: air pollution, lower altitudes, higher temperatures, lower neighborhood socioeconomic status, perceived neighborhood safety, an absence of local parks and closer proximity to fast-food restaurants.
6. Forge relationships with organizations that study obesity and advocate on behalf of people living with the disease.
Several organizations are working to educate journalists about obesity and help them improve their coverage. Five of the most prominent ones collaborated on a 10-page guide book, “Guidelines for Media Portrayals of Individuals Affected by Obesity.”
- The Rudd Center for Food Policy and Health, based at the University of Connecticut, “promotes solutions to food insecurity, poor diet quality, and weight bias through research and policy,” according to its website. Research topics include food and beverage marketing, weight-related bullying and taxes on sugary drinks.
- The Obesity Society helps journalists arrange interviews with obesity specialists. It also offers journalists free access to its academic journal, Obesity, and free registration to ObesityWeek, an international conference of researchers and health care professionals held every fall. This year’s conference is Nov. 2-6 in San Antonio, Texas.
- The Obesity Medicine Association represents health care providers who specialize in obesity treatment and care. It also helps journalists connect with obesity experts and offers, on an individual basis, free access to its events, including conferences and Obesity Medicine Fundamentals courses.
- The Obesity Action Coalition offers free access to its magazine, Weight Matters, and guides on weight bias at work and in health care.
- The American Society for Metabolic and Bariatric Surgery represents surgeons and other health care professionals who work in the field of metabolic and bariatric surgery. It provides the public with resources such as fact sheets and brief explanations of procedures such as the Roux-en-Y Gastric Bypass.
For further reading
Weight Stigma in Online News Images: A Visual Content Analysis of Stigma Communication in the Depictions of Individuals with Obesity in U.S. and U.K. News
Aditi Rao, Rebecca Puhl and Kirstie Farrar. Journal of Health Communication, November 2023.Influence and Effects of Weight Stigmatization in Media: A Systematic Review
James Kite; et al. eClinicalMedicine, June 2022.Has the Prevalence of Overweight, Obesity and Central Obesity Leveled Off in the United States? Trends, Patterns, Disparities, and Future Projections for the Obesity Epidemic
Youfa Wang; et al. International Journal of Epidemiology, June 2020.This article first appeared on The Journalist’s Resource and is republished here under a Creative Commons license.
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Viruses aren’t always harmful. 6 ways they’re used in health care and pest control
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We tend to just think of viruses in terms of their damaging impacts on human health and lives. The 1918 flu pandemic killed around 50 million people. Smallpox claimed 30% of those who caught it, and survivors were often scarred and blinded. More recently, we’re all too familiar with the health and economic impacts of COVID.
But viruses can also be used to benefit human health, agriculture and the environment.
Viruses are comparatively simple in structure, consisting of a piece of genetic material (RNA or DNA) enclosed in a protein coat (the capsid). Some also have an outer envelope.
Viruses get into your cells and use your cell machinery to copy themselves.
Here are six ways we’ve harnessed this for health care and pest control.1. To correct genes
Viruses are used in some gene therapies to correct malfunctioning genes. Genes are DNA sequences that code for a particular protein required for cell function.
If we remove viral genetic material from the capsid (protein coat) we can use the space to transport a “cargo” into cells. These modified viruses are called “viral vectors”.
Viral vectors can deliver a functional gene into someone with a genetic disorder whose own gene is not working properly.
Some genetic diseases treated this way include haemophilia, sickle cell disease and beta thalassaemia.
2. Treat cancer
Viral vectors can be used to treat cancer.
Healthy people have p53, a tumour-suppressor gene. About half of cancers are associated with the loss of p53.
Replacing the damaged p53 gene using a viral vector stops the cancerous cell from replicating and tells it to suicide (apoptosis).
Viral vectors can also be used to deliver an inactive drug to a tumour, where it is then activated to kill the tumour cell.
This targeted therapy reduces the side effects otherwise seen with cytotoxic (cell-killing) drugs.
We can also use oncolytic (cancer cell-destroying) viruses to treat some types of cancer.
Tumour cells have often lost their antiviral defences. In the case of melanoma, a modified herpes simplex virus can kill rapidly dividing melanoma cells while largely leaving non-tumour cells alone.
3. Create immune responses
Viral vectors can create a protective immune response to a particular viral antigen.
One COVID vaccine uses a modified chimp adenovirus (adenoviruses cause the common cold in humans) to transport RNA coding for the SARS-CoV-2 spike protein into human cells.
The RNA is then used to make spike protein copies, which stimulate our immune cells to replicate and “remember” the spike protein.
Then, when you are exposed to SARS-CoV-2 for real, your immune system can churn out lots of antibodies and virus-killing cells very quickly to prevent or reduce the severity of infection.
4. Act as vaccines
Viruses can be modified to act directly as vaccines themselves in several ways.
We can weaken a virus (for an attenuated virus vaccine) so it doesn’t cause infection in a healthy host but can still replicate to stimulate the immune response. The chickenpox vaccine works like this.
The Salk vaccine for polio uses a whole virus that has been inactivated (so it can’t cause disease).
Others use a small part of the virus such as a capsid protein to stimulate an immune response (subunit vaccines).
An mRNA vaccine packages up viral RNA for a specific protein that will stimulate an immune response.
5. Kill bacteria
Viruses can – in limited situations in Australia – be used to treat antibiotic-resistant bacterial infections.
Bacteriophages are viruses that kill bacteria. Each type of phage usually infects a particular species of bacteria.
Unlike antibiotics – which often kill “good” bacteria along with the disease-causing ones – phage therapy leaves your normal flora (useful microbes) intact.
6. Target plant, fungal or animal pests
Viruses can be species-specific (infecting one species only) and even cell-specific (infecting one type of cell only).
This occurs because the proteins viruses use to attach to cells have a shape that binds to a specific type of cell receptor or molecule, like a specific key fits a lock.
The virus can enter the cells of all species with this receptor/molecule. For example, rabies virus can infect all mammals because we share the right receptor, and mammals have other characteristics that allow infection to occur whereas other non-mammal species don’t.
When the receptor is only found on one cell type, then the virus will infect that cell type, which may only be found in one or a limited number of species. Hepatitis B virus successfully infects liver cells primarily in humans and chimps.
We can use that property of specificity to target invasive plant species (reducing the need for chemical herbicides) and pest insects (reducing the need for chemical insecticides). Baculoviruses, for example, are used to control caterpillars.
Similarly, bacteriophages can be used to control bacterial tomato and grapevine diseases.
Other viruses reduce plant damage from fungal pests.
Myxoma virus and calicivirus reduce rabbit populations and their environmental impacts and improve agricultural production.
Just like humans can be protected against by vaccination, plants can be “immunised” against a disease-causing virus by being exposed to a milder version.
Thea van de Mortel, Professor, Nursing, School of Nursing and Midwifery, Griffith University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Truth About Vaccines
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The Truth About Vaccines
Yesterday we asked your views on vaccines, and we got an interesting spread of answers. Of those who responded to the poll, most were in favour of vaccines. We got quite a lot of comments this time too; we can’t feature them all, but we’ll include extracts from a few in our article today, as they raised interesting points!
Vaccines contain dangerous ingredients that will harm us more than the disease would: True or False?
False, contextually.
Many people are very understandably wary of things they know full well to be toxic, being injected into them.
One subscriber who voted for “Vaccines are poison, and/or are some manner of conspiracy ” wrote:
❝I think vaccines from 50–60 years ago are true vaccines and were safer than vaccines today. I have not had a vaccine for many, many years, and I never plan to have any kind of vaccine/shot again.❞
They didn’t say why they personally felt this way, but the notion that “things were simpler back in the day” is a common (and often correct!) observation regards health, especially when it comes to unwanted additives and ultraprocessing of food.
Things like aluminum or mercury in vaccines are much like sodium and chlorine in table salt. Sodium and chlorine are indeed both toxic to us. But in the form of sodium chloride, it’s a normal part of our diet, provided we don’t overdo it.
Additionally, the amount of unwanted metals (e.g. aluminum, mercury) in vaccines is orders of magnitude smaller than the amount in dietary sources—even if you’re a baby and your “dietary sources” are breast milk and/or formula milk.
In the case of formaldehyde (an inactivating agent), it’s also the dose that makes the poison (and the quantity in vaccines is truly miniscule).
This academic paper alone cites more sources than we could here without making today’s newsletter longer than it already is:
Vaccine Safety: Myths and Misinformation
I have a perfectly good immune system, it can handle the disease: True or False?
True! Contingently.
In fact, our immune system is so good at defending against disease, that the best thing we can do to protect ourselves is show our immune system a dead or deactivated version of a pathogen, so that when the real pathogen comes along, our immune system knows exactly what it is and what to do about it.
In other words, a vaccine.
One subscriber who voted for “Vaccines are important but in some cases the side effects can be worse ” wrote:
❝In some ways I’m vacd out. I got COVid a few months ago and had no symptoms except a cough. I have asthma and it didn’t trigger a lot of congestion. No issues. I am fully vaccinated but not sure I’ll get one in fall.❞
We’re glad this subscriber didn’t get too ill! A testimony to their robust immune system doing what it’s supposed to, after being shown a recent-ish edition of the pathogen, in deactivated form.
It’s very reasonable to start wondering: “surely I’m vaccinated enough by now”
And, hopefully, you are! But, as any given pathogen mutates over time, we eventually need to show our immune system what the new version looks like, or else it won’t recognize it.
See also: Why Experts Think You’ll Need a COVID-19 Booster Shot in the Future
So why don’t we need booster shots for everything? Often, it’s because a pathogen has stopped mutating at any meaningful rate. Polio is an example of this—no booster is needed for most people in most places.
Others, like flu, require annual boosters to keep up with the pathogens.
Herd immunity will keep us safe: True or False?
True! Ish.
But it doesn’t mean what a lot of people think it means. For example, in the UK, “herd immunity” was the strategy promoted by Prime Minister of the hour, Boris Johnson. But he misunderstood what it meant:
- What he thought it meant: everyone gets the disease, then everyone who doesn’t die is now immune
- What it actually means: if most people are immune to the disease (for example: due to having been vaccinated), it can’t easily get to the people who aren’t immune
One subscriber who voted for “Vaccines are critical for our health; vax to the max! ” wrote:
❝I had a chiropractor a few years ago, who explained to me that if the general public took vaccines, then she would not have to vaccinate her children and take a risk of having side effects❞
Obviously, we can’t speak for this subscriber’s chiropractor’s children, but this raises a good example: some people can’t safely have a given vaccine, due to underlying medical conditions—or perhaps it is not available to them, for example if they are under a certain age.
In such cases, herd immunity—other people around having been vaccinated and thus not passing on the disease—is what will keep them safe.
Here’s a useful guide from the US Dept of Health and Human Services:
How does community immunity (a.k.a. herd immunity) work?
And, for those who are more visually inclined, here’s a graphical representation of a mathematical model of how herd immunity works (you can run a simulation)!
Stay safe!
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Black Cohosh vs The Menopause
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Black Cohosh, By Any Other Name…
Black cohosh is a flowering plant whose extracts are popularly used to relieve menopausal (and postmenopausal) symptoms.
Note on terms: we’ll use “black cohosh” in this article, but if you see the botanical names in studies, the reason it sometimes appears as Actaea racemosa and sometimes as Cimicfuga racemosa, is because it got changed and changed back on account of some disagreements between botanists. It’s the same plant, in any case!
Read: Reclassification of Actaea to include Cimicifuga and Souliea (Ranunculaceae)
Does it work?
In few words: it works for physical symptoms, but not emotional ones, based on this large (n=2,310) meta-analysis of studies:
❝Black cohosh extracts were associated with significant improvements in overall menopausal symptoms (Hedges’ g = 0.575, 95% CI = 0.283 to 0.867, P < 0.001), as well as in hot flashes (Hedges’ g = 0.315, 95% CIs = 0.107 to 0.524, P = 0.003), and somatic symptoms (Hedges’ g = 0.418, 95% CI = 0.165 to 0.670, P = 0.001), compared with placebo.
However, black cohosh did not significantly improve anxiety (Hedges’ g = 0.194, 95% CI = -0.296 to 0.684, P = 0.438) or depressive symptoms (Hedges’ g = 0.406, 95% CI = -0.121 to 0.932, P = 0.131)❞
~ Dr. Ryochi Sadahiro et al., 2023
Source: Black cohosh extracts in women with menopausal symptoms: an updated pairwise meta-analysis
Here’s an even larger (n=43,759) one that found similarly, and also noted on safety:
❝Treatment with iCR/iCR+HP was well tolerated with few minor adverse events, with a frequency comparable to placebo. The clinical data did not reveal any evidence of hepatotoxicity.
Hormone levels remained unchanged and estrogen-sensitive tissues (e.g. breast, endometrium) were unaffected by iCR treatment.
As benefits clearly outweigh risks, iCR/iCR+HP should be recommended as an evidence-based treatment option for natural climacteric symptoms.
With its good safety profile in general and at estrogen-sensitive organs, iCR as a non-hormonal herbal therapy can also be used in patients with hormone-dependent diseases who suffer from iatrogenic climacteric symptoms.❞
~ Dr. Castelo-Branco et al., 2020
(iCR = isopropanolic Cimicifuga racemosa)
So, is this estrogenic or not?
This is the question many scientists were asking, about 20 or so years ago. There are many papers from around 2000–2005, but here’s a good one that’s quite representative:
❝These new data dispute the estrogenic theory and demonstrate that extracts of black cohosh do not bind to the estrogen receptor in vitro, up-regulate estrogen-dependent genes, or stimulate the growth of estrogen-dependent tumors❞
Source: Is Black Cohosh Estrogenic?
(the abstract is a little vague, but if you click on the PDF icon, you can read the full paper, which is a lot clearer and more detailed)
The short answer: no, black cohosh is not estrogenic
Is it safe?
As ever, check with your doctor as everyone’s situation can vary, but broadly speaking, yes, it has a very good safety profile—including for breast cancer patients, at that. See for example:
- Black cohosh efficacy and safety for menopausal symptoms: the Spanish Menopause Society statement
- Black cohosh (Cimicifuga racemosa): safety and efficacy for cancer patients
- The safety of black cohosh (Actaea racemosa, Cimicifuga racemosa)
Where can I get some?
We don’t sell it, but here for your convenience is an example product on Amazon
Enjoy!
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