How Your Sleep Position Changes Dementia Risk
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This is not just about sleep duration or even about sleep quality… It really is about which way your body is positioned.
Goodnight, glymphatic system
The association between sleeping position and dementia risk is about glymphatic drainage, which is largely powered by gravity (and thus dependent on which way around your head and neck are oriented), and very important for clearing toxins out of the brain—including beta-amyloid proteins.
This becomes particularly important when the glymphatic system becomes less efficient in midlife, often 15–20 years before cognitive decline symptoms appear.
The video’s thumbnail headline, “SCIENTISTS REVEAL: THE WAY YOUR SLEEP CAN CAUSE DEMENTIA” is overstated and inaccurate, but our adjusted headline “how your sleep position changes dementia risk” is actually representative of the paper on which this video was based; we’ll quote from the paper itself here:
❝This paper concludes that 1. glymphatic clearance plays a major role in Alzheimer’s pathology; 2. the vast majority of waste clearance occurs during sleep; 3. dementias are associated with sleep disruption, alongside an age-related decline in AQP4 polarization; and 4. lifestyle choices such as sleep position, alcohol intake, exercise, omega-3 consumption, intermittent fasting and chronic stress all modulate* glymphatic clearance. Lifestyle choices could therefore alter Alzheimer’s disease risk through improved glymphatic clearance, and could be used as a preventative lifestyle intervention for both healthy brain ageing and Alzheimer’s disease.❞
…and specifically, they found:
❝Glymphatic transport is most efficient in the right lateral sleeping position, with more CSF clearance occurring compared to supine and prone. The average person changes sleeping position 11 times per night, but there was no difference in the number of position changes between neurodegenerative and control groups, making the percentage of time spent in supine position the risk factor, not the number of position changes❞
Read the paper in full here: The Sleeping Brain: Harnessing the Power of the Glymphatic System through Lifestyle Choices
*saying “modulate” here is not as useful as it could be, because they modulate it differently: side-sleeping improves clearance; back sleeping decreases it; front-sleeping isn’t great either. Alcohol intake reduces clearance, exercise (especially cardiovascular exercise) improves it; omega-3 consumption improves it up a degree and does depend on omega-3/6 ratios, intermittent fasting improves it, and chronic stress worsens it.
And for a more pop-science presentation, enjoy:
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Want to learn more?
You might also like to read:
How To Clean Your Brain (Glymphatic Health Primer)
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Greek Yogurt vs Cottage Cheese – Which is Healthier?
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Our Verdict
When comparing Greek yogurt to cottage cheese, we picked the yogurt.
Why?
These are both dairy products popularly considered healthy, mostly for their high-protein, low-carb, low-fat profile. We’re going to assume that both were made without added sugars. Thus, their macro profiles are close to identical, and nothing between them there.
In the category of vitamins, both are a good source of some B vitamins, and neither are good source of much else. The B-vitamins they have most of, B2 and B12, Greek yogurt has more.
We’ll call this a small win for Greek yogurt.
As they are dairy products, you might have expected them to contain vitamin D—however (unless they have been artificially fortified, as is usually done with plant-based equivalents) they contain none or trace amounts only.
When it comes to minerals, both are reasonable sources of calcium, selenium, and phosphorus. Of these, they’re equal on the selenium, while cottage cheese has more phosphorus and Greek yogurt has more calcium.
Since it’s also a mineral (even if it’s usually one we’re more likely to be trying to get less of), it’s also worth noting here that cottage cheese is quite high in sodium, while Greek yogurt is not.
Another win for Greek yogurt.
Beyond those things, we’d be remiss not to mention that Greek yogurt contains plenty of probiotic bacteria, while cottage cheese does not.
Want to learn more?
You might like to read:
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The Health Fix – by Dr. Ayan Panja
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The book is divided into three main sections:
- The foundations
- The aspirations
- The fixes
The foundations are an overview of the things you’re going to need to know, about biology, behaviors, and being human.
The aspirations are research-generated common hopes, desires, dreams and goals of patients who have come to Dr. Panja for help.
The fixes are exactly what you’d hope them to be. They’re strategies, tools, hacks, tips, tricks, to get you from where you are now to where you want to be, health-wise.
The book is well-structured, with deep-dives, summaries, and practical advice of how to make sure everything you’re doing works together as part of the big picture that you’re building for your health.
All in all, a fantastic catch-all book, whatever your health goals.
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Alzheimer’s Sex Differences May Not Be What They Appear
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Alzheimer’s Sex Differences May Not Be What They Appear
Women get Alzheimer’s at nearly twice the rate than men do, and deteriorate more rapidly after onset, too.
So… Why?
There are many potential things to look at, but four stand out for quick analysis:
- Chromosomes: women usually have XX chromosomes, to men’s usual XY. There are outliers to both groups, people with non-standard combinations of chromosomes, but not commonly enough to throw out the stats.
- Hormones: women usually have high estrogen and low testosterone, compared to men. Again there are outliers and this is a huge oversimplification that doesn’t even look at other sex hormones, but broadly speaking (which sounds vague, but is actually what is represented in epidemiological studies), it will be so.
- Anatomy: humans have some obvious sexual dimorphism (again, there are outliers, but again, not enough to throw out the stats); this seems least likely to be relevant (Alzheimer’s is probably not stored in the breasts, for examples), though average body composition (per muscle:fat ratio) could admittedly be a factor.
- Social/lifestyle: once again, #NotAllWomen etc, but broadly speaking, women and men often tend towards different social roles in some ways, and as we know, of course lifestyle can play a part in disease pathogenesis.
As a quick aside before we continue, if you’re curious about those outliers, then a wiki-walk into the fascinating world of intersex conditions, for example, could start here. But by and large, this won’t affect most people.
So… Which parts matter?
Back in 2018, Dr. Maria Teresa Ferretti et al. kicked up some rocks in this regard, looking not just at genes (as much research has focussed on) or amyloid-β (again, well-studied) but also at phenotypes and metabolic and social factors—bearing in mind that all three of those are heavily influenced by hormones. Noting, for example, that (we’ll quote directly here):
- Men and women with Alzheimer disease (AD) exhibit different cognitive and psychiatric symptoms, and women show faster cognitive decline after diagnosis of mild cognitive impairment (MCI) or AD dementia.
- Brain atrophy rates and patterns differ along the AD continuum between the sexes; in MCI, brain atrophy is faster in women than in men.
- The prevalence and effects of cerebrovascular, metabolic and socio-economic risk factors for AD are different between men and women.
See: Sex differences in Alzheimer disease—the gateway to precision medicine
So, have scientists controlled for each of those factors?
Mostly not! But they have found clues, anyway, while noting the limitations of the previous way of conducting studies. For example:
❝Women are more likely to develop Alzheimer’s disease and experience faster cognitive decline compared to their male counterparts. These sex differences should be accounted for when designing medications and conducting clinical trials❞
~ Dr. Feixiong Cheng
Read: Research finds sex differences in immune response and metabolism drive Alzheimer’s disease
Did you spot the clue?
It was “differences in immune response and metabolism”. These things are both influenced by (not outright regulated by, but strongly influenced by) sex hormones.
❝As [hormonal] sex influences both the immune system and metabolic process, our study aimed to identify how all of these individual factors influence one another to contribute to Alzheimer’s disease❞
~ Dr. Justin Lathia
Ignoring for a moment progesterone’s role in metabolism, estrogen is an immunostimulant and testosterone is an immunosuppressant. These thus both also have an effect in inflammation, which yes, includes neuroinflammation.
But wait a minute, shouldn’t that mean that women are more protected, not less?
It should! Except… Alzheimer’s is an age-related disease, and in the age-bracket that generally gets Alzheimer’s (again, there are outliers), menopause has been done and dusted for quite a while.
Which means, and this is critical: post-menopausal women not on HRT are essentially left without the immune boost usually directed by estrogen, while men of the same age will be ticking over with their physiology that (unlike that of the aforementioned women) was already adapted to function with negligible estrogen.
Specifically:
❝The metabolic consequences of estrogen decline during menopause accelerate neuropathology in women❞
~ Dr. Rasha Saleh
Critical idea to take away from all this:
Alzheimer’s research is going to be misleading if it doesn’t take into account sex differences, and not just that, but also specifically age-relevant sex differences—because that can flip the narrative. If we don’t take age into account, we could be left thinking estrogen is to blame, when in fact, it appears to be the opposite.
In the meantime, if you’re a woman of a certain age, you might talk with a doctor about whether HRT could be beneficial for you, if you haven’t already:
❝Women at genetic risk for AD (carrying at least one APOE e4 allele) seem to be particularly benefiting from MHT❞
(MHT = Menopausal Hormone Therapy; also commonly called HRT, which is the umbrella term for Hormone Replacement Therapies in general)
~ Dr. Herman Depypere
Source study: Menopause hormone therapy significantly alters pathophysiological biomarkers of Alzheimer’s disease
Pop-sci press release version: HRT could ward off Alzheimer’s among at-risk women
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Increase in online ADHD diagnoses for kids poses ethical questions
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In 2020, in the midst of a pandemic, clinical protocols were altered for Ontario health clinics, allowing them to perform more types of care virtually. This included ADHD assessments and ADHD prescriptions for children – services that previously had been restricted to in-person appointments. But while other restrictions on virtual care are back, clinics are still allowed to virtually assess children for ADHD.
This shift has allowed for more and quicker diagnoses – though not covered by provincial insurance (OHIP) – via a host of newly emerging private, for-profit clinics. However, it also has raised significant ethical questions.
It solves an equity issue in terms of rural access to timely assessments, but does it also create new equity issues as a privatized service?
Is it even feasible to diagnose a child for a condition like ADHD without meeting that child in person?
And as rates of ADHD diagnosis continue to rise, should health regulators re-examine the virtual care approach?
Ontario: More prescriptions, less regulation
There are numerous for-profit clinics offering virtual diagnoses and prescriptions for childhood ADHD in Ontario. These include KixCare, which does not offer the option of an in-person assessment. Another clinic, Springboard, makes virtual appointments available within days, charging around $2,600 for assessments, which take three to four hours. The clinic offers coaching and therapy at an additional cost, also not covered by OHIP. Families can choose to continue to visit the clinic virtually during a trial stage with medications, prescribed by a doctor in the clinic who then sends prescribing information back to the child’s primary care provider.
For-profit clinics like these are departing from Canada’s traditional single-payer health care model. By charging patients out-of-pocket fees for services, the clinics are able to generate more revenue because they are working outside of the billing standards for OHIP, standards that set limits on the maximum amount doctors can earn for providing specific services. Instead many services are provided by non-physician providers, who are not limited by OHIP in the same way.
Need for safeguards
ADHD prescriptions rose during the pandemic in Ontario, with women, people of higher income and those aged 20 to 24 receiving the most new diagnoses, according to research published in January 2024 by a team including researchers from the Centre for Addictions and Mental Health and Holland Bloorview Children’s Hospital. There may be numerous reasons for this increase but could the move to virtual care have been a factor?
Ontario psychiatrist Javeed Sukhera, who treats both children and adults in Canada and the U.S., says virtual assessments can work for youth with ADHD, who may receive treatment quicker if they live in remote areas. However, he is concerned that as health care becomes more privatized, it will lead to exploitation and over-diagnosis of certain conditions.
“There have been a lot of profiteers who have tried to capitalize on people’s needs and I think this is very dangerous,” he said. “In some settings, profiteering companies have set up systems to offer ADHD assessments that are almost always substandard. This is different from not-for-profit setups that adhere to quality standards and regulatory mechanisms.”
Sukhera’s concerns recall the case of Cerebral Inc., a New York state-based virtual care company founded in 2020 that marketed on social media platforms including Instagram and TikTok. Cerebral offered online prescriptions for ADHD drugs among other services and boasted more than 200,000 patients. But as Dani Blum reported in the New York Times, Cerebral was accused in 2023 of pressuring doctors on staff to prescribe stimulants and faced an investigation by state prosecutors into whether it violated the U.S. Controlled Substances Act.
“At the start of the pandemic, regulators relaxed rules around medical prescription of controlled substances,” wrote Blum. “Those changes opened the door for companies to prescribe and market drugs without the protocols that can accompany an in-person visit.”
Access increased – but is it equitable?
Virtual care has been a necessity in rural areas in Ontario since well before the pandemic, although ADHD assessments for children were restricted to in-person appointments prior to 2020.
But ADHD assessment clinics that charge families out-of-pocket for services are only accessible to people with higher incomes. Rural families, many of whom are low income, are unable to afford thousands for private assessments, let alone the other services upsold by providers. If the private clinic/virtual care trend continues to grow unchecked, it may also attract doctors away from the public model of care since they can bill more for services. This could further aggravate the gap in care that lower income people already experience.
This could further aggravate the gap in care that lower income people already experience.
Sukhera says some risks could be addressed by instituting OHIP coverage for services at private clinics (similar to private surgical facilities that offer mixed private/public coverage), but also with safeguards to ensure that profits are reinvested back into the health-care system.
“This would be especially useful for folks who do not have the income, the means to pay out of pocket,” he said.
Concerns of misdiagnosis and over-prescription
Some for-profit companies also benefit financially from diagnosing and issuing prescriptions, as has been suggested in the Cerebral case. If it is cheaper for a clinic to do shorter, virtual appointments and they are also motivated to diagnose and prescribe more, then controls need to be put in place to prevent misdiagnosis.
The problem of misdiagnosis may also be related to the nature of ADHD assessments themselves. University of Strathclyde professor Matthew Smith, author of Hyperactive: The Controversial History of ADHD, notes that since the publication of Diagnostic and Statistical Manual of Mental Disorders in 1980, assessment has typically involved a few hours of parents and patients providing their subjective perspectives on how they experience time, tasks and the world around them.
“It’s often a box-ticking exercise, rather than really learning about the context in which these behaviours exist,” Smith said. “The tendency has been to use a list of yes/no questions which – if enough are answered in the affirmative – lead to a diagnosis. When this is done online or via Zoom, there is even less opportunity to understand the context surrounding behaviour.”
Smith cited a 2023 BBC investigation in which reporter Rory Carson booked an in-person ADHD assessment at a clinic and was found not to have the condition, then had a private online assessment – from a provider on her couch in a tracksuit – and was diagnosed with ADHD after just 45 minutes, for a fee of £685.
What do patients want?
If Canadian regulators can effectively tackle the issue of privatization and the risk of misdiagnosis, there is still another hurdle: not every youth is willing to take part in virtual care.
Jennifer Reesman, a therapist and Training Director for Neuropsychology at the Chesapeake Center for ADHD, Learning & Behavioural Health in Maryland, echoed Sukhera’s concerns about substandard care, cautioning that virtual care is not suitable for some of her young clients who had poor experiences with online education and resist online health care. It can be an emotional issue for pediatric patients who are managing their feelings about the pandemic experience.
“We need to respect what their needs are, not just the needs of the provider,” says Reesman.
In 2020, Ontario opted for virtual care based on the capacity of our health system in a pandemic. Today, with a shortage of doctors, we are still in a crisis of capacity. The success of virtual care may rest on how engaged regulators are with equity issues, such as waitlists and access to care for rural dwellers, and how they resolve ethical problems around standards of care.
Children and youth are a distinct category, which is why we had restrictions on virtual ADHD diagnosis prior to the pandemic. A question remains, then: If we could snap our fingers and have the capacity to provide in-person ADHD care for all children, would we? If the answer to that question is yes, then how can we begin to build our capacity?
This article is republished from healthydebate under a Creative Commons license. Read the original article.
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Vitamin C (Drinkable) vs Vitamin C (Chewable) – Which is Healthier?
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.
Our Verdict
When comparing vitamin C (drinkable) to vitamin C (chewable), we picked the drinkable.
Why?
First let’s look at what’s more or less the same in each:
- The usable vitamin C content is comparable
- The bioavailability is comparable
- The additives to hold it together are comparable
So what’s the difference?
With the drinkable, you also drink a glass of water
If you’d like to read more about how to get the most out of the vitamins you take, you can do so here:
Are You Wasting Your Vitamins? Maybe, But You Don’t Have To
If you’d like to get some of the drinkable vitamin C, here’s an example product on Amazon
Enjoy!
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Food for Thought – by Lorraine Perretta
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What are “brain foods”? If you think for a moment, you can probably list a few. What this book does is better.
As well as providing the promised 50 recipes (which themselves are varied, good, and easy), Perretta explains the science of very many brain-healthy ingredients. Not just that, but also the science of a lot of brain-unhealthy ingredients. In the latter case, probably things you already knew to stay away from, but still, it’s a good reminder of one more reason why.
Nor does she merely sort things into brain-healthy (or brain-unhealthy, or brain-neutral), but rather she gives lists of “this for memory” and “this against depression” and “this for cognition” and “this against stress” and so forth.
Perhaps the greatest value of this book is in that; her clear explanations with science that’s simplified but not dumbed down. The recipes are definitely great too, though!
Bottom line: if you’d like to eat more for brain health, this book will give you many ways of doing so
Click here to check out Food for Thought, and upgrade your recipes!
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