The Brain Alarm Signs That Warn Of Dementia
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When it comes to predicting age-related cognitive impairment:
First there are genetic factors to take into account (such as the APOE4 gene for Alzheimer’s), as well as things such as age and sex.
When it comes to sex, by the way, what matters here is hormones, which is why [it seems; this as technically as yet unproven with full rigor, but the hypothesis is sound and there is a body of evidence gradually being accumulated to support it] postmenopausal women with untreated menopause get Alzheimer’s at a higher rate and deteriorate more quickly:
Alzheimer’s Sex Differences May Not Be What They Appear
Next, there are obviously modifiable lifestyle factors to take into account, things that will reduce your risk such as getting good sleep, good diet, good exercise, and abstaining from alcohol and smoking, as well as oft-forgotten things such as keeping cognitively active and, equally importantly, socially active:
How To Reduce Your Alzheimer’s Risk
(the article outlines what matters the most in each of the above areas, by the way, so that you can get the most bang-for-buck in terms of lifestyle adjustments)
Lastly (in the category of risk factors), there are things to watch out for in the blood such as hypertension and high cholesterol.
Nipping it in the blood
In new research (so new it is still ongoing, but being at year 2 of a 4-year prospective study, they have published a paper with their results so far), researchers have:
- started with the premise “dementia is preceded by mild cognitive impairment”
- then, asked the question “what are the biometric signs of mild cognitive impairment?”
Using such tools as functional near-infrared spectroscopy (fNIRS) while the participants performed cognitive tasks, they were able to record changes in plasma levels of extracellular vesicles, assessing them with small-particle flow cytometry.
Translating from sciencese: they gave the participants mental tasks, and while they completed them, the researchers scanned their brains and monitored blood flow and the brain’s ability to compensate for any lack of it.
What they found:
- in young adults, blood flow increased, facilitating neurovascular coupling (this is good)
- in older adults, blood flow did not increase as much, but they engaged other areas of the brain to compensate, by what’s called functional connectivity (this is next best)
- in those with mild cognitive impairment, blood flow was reduced, and they did not have the ability to compensate by functional connectivity (this is not good)
They also performed a liquid biopsy, which sounds alarming but it just means they took some blood, and tested this for density of cerebrovascular endothelial extracellular vesicles (CEEVs), which—in more prosaic words—are bits from the cells lining the blood vessels in the brain.
People with mild cognitive impairment had more of these brain bits in their blood than those without.
You can read the paper itself here:
What this means
The science here is obviously still young (being as it is still in progress), but this will likely contribute greatly to early warning signs of dementia, by catching mild cognitive impairment in its early stages, by means of a simple blood test, instead of years of wondering before getting a dementia diagnosis.
And of course, forewarned is forearmed, so if this is something that could be done as a matter of routine upon hitting the age of, say, 65 and then periodically thereafter, it would catch a lot of cases while there’s still more time to turn things around.
As for how to turn things around, well, we imagine you have now read our “How To Reduce Your Alzheimer’s Risk” article linked up top (if not, we recommend checking it out), and there is also…
Do Try This At Home: The 12-Week Brain Fitness Program To Measurably Boost Your Brain
Take care!
When it comes to predicting age-related cognitive impairment:
First there are genetic factors to take into account (such as the APOE4 gene for Alzheimer’s), as well as things such as age and sex.
When it comes to sex, by the way, what matters here is hormones, which is why [it seems; this as technically as yet unproven with full rigor, but the hypothesis is sound and there is a body of evidence gradually being accumulated to support it] postmenopausal women with untreated menopause get Alzheimer’s at a higher rate and deteriorate more quickly:
Alzheimer’s Sex Differences May Not Be What They Appear
Next, there are obviously modifiable lifestyle factors to take into account, things that will reduce your risk such as getting good sleep, good diet, good exercise, and abstaining from alcohol and smoking, as well as oft-forgotten things such as keeping cognitively active and, equally importantly, socially active:
How To Reduce Your Alzheimer’s Risk
(the article outlines what matters the most in each of the above areas, by the way, so that you can get the most bang-for-buck in terms of lifestyle adjustments)
Lastly (in the category of risk factors), there are things to watch out for in the blood such as hypertension and high cholesterol.
Nipping it in the blood
In new research (so new it is still ongoing, but being at year 2 of a 4-year prospective study, they have published a paper with their results so far), researchers have:
- started with the premise “dementia is preceded by mild cognitive impairment”
- then, asked the question “what are the biometric signs of mild cognitive impairment?”
Using such tools as functional near-infrared spectroscopy (fNIRS) while the participants performed cognitive tasks, they were able to record changes in plasma levels of extracellular vesicles, assessing them with small-particle flow cytometry.
Translating from sciencese: they gave the participants mental tasks, and while they completed them, the researchers scanned their brains and monitored blood flow and the brain’s ability to compensate for any lack of it.
What they found:
- in young adults, blood flow increased, facilitating neurovascular coupling (this is good)
- in older adults, blood flow did not increase as much, but they engaged other areas of the brain to compensate, by what’s called functional connectivity (this is next best)
- in those with mild cognitive impairment, blood flow was reduced, and they did not have the ability to compensate by functional connectivity (this is not good)
They also performed a liquid biopsy, which sounds alarming but it just means they took some blood, and tested this for density of cerebrovascular endothelial extracellular vesicles (CEEVs), which—in more prosaic words—are bits from the cells lining the blood vessels in the brain.
People with mild cognitive impairment had more of these brain bits in their blood than those without.
You can read the paper itself here:
What this means
The science here is obviously still young (being as it is still in progress), but this will likely contribute greatly to early warning signs of dementia, by catching mild cognitive impairment in its early stages, by means of a simple blood test, instead of years of wondering before getting a dementia diagnosis.
And of course, forewarned is forearmed, so if this is something that could be done as a matter of routine upon hitting the age of, say, 65 and then periodically thereafter, it would catch a lot of cases while there’s still more time to turn things around.
As for how to turn things around, well, we imagine you have now read our “How To Reduce Your Alzheimer’s Risk” article linked up top (if not, we recommend checking it out), and there is also…
Do Try This At Home: The 12-Week Brain Fitness Program To Measurably Boost Your Brain
Take care!
Don’t Forget…
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The Blood Sugar Solution – by Dr. Mark Hyman
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.
The main purpose of this book is combating metabolic disease, the amalgam of what’s often prediabetes (sometimes fully-fledged diabetes) and cardiovascular disease (sometimes fully-fledged heart disease).
To achieve this (after an introductory section explaining what the sociomedical problems are and why the sociomedical problems are happening), he offers a seven-step program; we’ll not keep those steps a mystery; they are:
- Boost your nutrition
- Regulate your hormones
- Reduce inflammation
- Improve your digestion
- Maximize detoxification
- Enhance energy metabolism
- Soothe your mind
Thereafter, it’s all about leading the reader by the hand through the steps; he also offers a six-week action plan, and a six-week meal plan with recipes.
The style is very sensationalist (too sensationalist for this reviewer’s personal taste) but nevertheless backed up with hard science when it comes to hard claims. So, if you don’t mind wading through (or skipping) some early chapters that are a bit “used car salesman” in feel, there’s actually a lot of good information, especially in the middle of the book, and useful practical guides in the middle and end.
Bottom line: if you want a good comprehensive science-based practical guide to addressing the risk of metabolic disease, this is that.
Click here to check out The Blood Sugar Solution, and look after yours!
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Non-Alcohol Mouthwash vs Alcohol Mouthwash – 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 non-alcohol mouthwash to alcohol mouthwash, we picked the alcohol.
Why?
Note: this is a contingent choice and is applicable to most, but not all, people.
In short, there has been some concern about alcohol mouthwashes increasing cancer risk, but research has shown this is only the case if you already have an increased risk of oral cancer (for example if you smoke, and/or have had an oral cancer before).
For those for whom this is not the case (for example, if you don’t smoke, and/or have no such cancer history), then best science currently shows that alcohol mouthwash does not cause any increased risk.
What about non-alcohol mouthwashes? Well, they have a different problem; they usually use chlorine-based chemicals like chlorhexidine or cetylpyridinium chloride, which are (exactly as the label promises) exceptionally good at killing oral bacteria.
(They’d kill us too, at higher doses, hence: swill and spit)
Unfortunately, much like the rest of our body, our mouth is supposed to have bacteria there and bad things happen when it doesn’t. In the case of our oral microbiome, cleaning it with such powerful antibacterial agents can kill our “good” bacteria along with the bad, which lowers the pH of our saliva (that’s bad; it means it is more acidic), and thus indirectly erodes tooth enamel.
You can read more about the science of all of the above (with references), here:
Toothpastes & Mouthwashes: Which Help And Which Harm?
Summary:
For most people, alcohol mouthwashes are a good way to avoid the damage that can be done by chlorhexidine in non-alcohol mouthwashes.
Here are some examples, but there will be plenty in your local supermarket:
Non-Alcohol, by Colgate | Alcohol, by Listerine
If you have had oral cancer, or if you smoke, then you may want to seek a third alternative (and also, please, stop smoking if you can).
Or, really, most people could probably skip mouthwashes, if you’ve good oral care already by other means. See also:
Toothpastes & Mouthwashes: Which Help And Which Harm?
(yes, it’s the same link as before, but we’re now drawing your attention to the fact it has information about toothpastes too)
If you do want other options though, might want to check out:
Less Common Oral Hygiene Options ← miswak sticks are especially effective
Take care!
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How to Vary Breakfast for Digestion?
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.
It’s Q&A Day at 10almonds!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
❝Would appreciate your thoughts on how best to promote good digestion. For years, my breakfast has consisted of flaxseeds, sunflower seeds, and almonds – all well ground up – eaten with a generous amount of kefir. This works a treat as far as my digestion is concerned. But I sometimes wonder whether it would be better for my health if I varied or supplemented this breakfast. How might I do this without jeopardising my good digestion?❞
Sounds like you’re already doing great! Those ingredients are all very nutrient-dense, and grinding them up improves digestion greatly, to the point that you’re getting nutrients your body couldn’t get at otherwise. And the kefir, of course, is a top-tier probiotic.
Also, you’re getting plenty of protein and healthy fats in with your carbs, which results in the smoothest blood sugar curve.
As for variety…
Variety is good in diet, but variety within a theme. Our gut microbiota change according to what we eat, so sudden changes in diet are often met with heavy resistance from our gut.
- For example, people who take up a 100% plant-based diet overnight often spend the next day in the bathroom, and wonder what happened.
- Conversely, a long-time vegan who (whether by accident or design) consumes meat or dairy will likely find themself quickly feeling very unwell, because their gut microbiota have no idea what to do with this.
So, variety yes, but within a theme, and make any changes gradual for the easiest transition.
All in all, the only obvious suggestion for improvement is to consider adding some berries. These can be fresh, dried, or frozen, and will confer many health benefits (most notably a lot of antioxidant activity).
Enjoy!
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The Salt Fix – by Dr. James DiNicolantonio
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.
This book has a bold premise: high salt consumption is not, as global scientific consensus holds, a serious health risk, but rather, as the title suggests, a health fix.
Dr. DiNicolantonio, a pharmacist, explains how “our ancestors crawled out of the sea millions of years ago and we still crave that salt”, giving this as a reason why we should consume salt ad libitum, aiming for 8–10g per day, and thereafter a fair portion of the book is given over to discussing how many health conditions are caused/exacerbated by sugar, and that therefore we have demonized the wrong white crystal (scientific consensus is that there are many white crystals that can cause us harm).
Indeed, sugar can be a big health problem, but reading it at such length felt a lot like when all a politician can talk about is how their political rival is worse.
A lot of the studies the author cites to support the idea of healthy higher salt consumption rates were on non-human animals, and it’s always a lottery as to whether those results translate to humans or not. Also, many of the studies he’s citing are old and have methodological flaws, while others we could not find when we looked them up.
One of the sources cited is “my friend Jose tried this and it worked for him”.
Bottom line: sodium is an essential mineral that we do need to live, but we are not convinced that this book’s ideas have scientific merit. But are they well-argued? Also no.
Click here to check out The Salt Fix for yourself! It’s a fascinating book.
(Usually, if we do not approve of a book, we simply do not review it. We like to keep things positive. However, this one came up in Q&A, so it seemed appropriate to share our review. Also, the occasional negative review may reassure you, dear readers, that when we praise a book, we mean it)
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Drug Metabolism (When You’re Not Average!)
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.
When Your Medications Run Out… Of You
Everybody knows that alcohol can affect medications’ effects, but what of smoking, and what of obesity? And how does the alcohol thing work anyway?
It’s all about the enzymes
Medicines that are processed by the liver (which is: most medicines) are metabolized there by specialist enzymes, and the things we do can increase or decrease the quantity of those enzymes—and/or how active they are.
Dr. Kata Wolff Pederson and her team of researchers at Aarhus University in Denmark examined the livers of recently deceased donors in ways that can’t (ethically) be done with live patients, and were able to find the associations between various lifestyle factors and different levels of enzymes responsible for drug metabolism.
And it’s not always how you might think!
Some key things they found:
- Smokers have twice as high levels of enzyme CYP1A2 than non-smokers, which results in the faster metabolism of a lot of drugs.
- Drinkers have 30% higher levels of enzyme CYP2E1, which also results in a faster metabolism of a lot of drugs.
- Patients with obesity have 50% lower levels of enzyme CYP3A4, resulting in slower metabolism of many drugs
This gets particularly relevant when we take into account the next fact:
- Of the individuals in the study, 40% died from poisoning from a mixture of drugs (usually: prescription and otherwise)
Read in full: Sex- and Lifestyle-Related Factors are Associated with Altered Hepatic CYP Protein Levels
Read a pop-sci article about it: Your lifestyle can determine how well your medicine will work
How much does the metabolism speed matter?
It can matter a lot! If you’re taking drugs and carefully abiding by the dosage instructions, those instructions were assuming they know your speed of metabolism, and this is based on an average.
- If your metabolism is faster, you can get too much of a drug too quickly, and it can harm you
- If your metabolism is faster, it also means that while yes it’ll start working sooner, it’ll also stop working sooner
- If it’s a painkiller, that’s inconvenient. If it’s a drug that keeps you alive, then well, that’s especially unfortunate.
- If your metabolism is slower, it can mean your body is still processing the previous dose(s) when you take the next one, and you can overdose (and potentially die)
We touched on this previously when we talked about obesity in health care settings, and how people can end up getting worse care:
As for alcohol and drugs? Obviously we do not recommend, but here’s some of the science of it with many examples:
Why it’s a bad idea to mix alcohol with some medications
Take care!
Don’t Forget…
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White Noise vs Pink Noise
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.
It’s Q&A Day at 10almonds!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
❝I live in a large city and even late at night there is always a bit of background noise. While I am pretty used to it by now, I find I don’t sleep nearly as well in the city as I do in the country. I have seen some stuff about “white noise” generators. I was wondering whether you have any thoughts about the science behind these, and whether it is something I should try out – or maybe I should be trying something completly different.❞
The science says…
❝Our data show that white noise significantly improved sleep based on subjective and objective measurements in subjects complaining of difficulty sleeping due to high levels of environmental noise. This suggests that the application of white noise may be an effective tool in helping to improve sleep in those settings.❞
That said, you might also consider “pink noise”, which is very similar to white noise (having all frequencies normally audible to the human ear), but has greater intensity of lower frequencies, creating a more deep and even sound. While white noise and pink noise are both great at “muting” external sounds like those that have been disturbing your sleep, pink noise may have an advantage in helping to stimulate deep and restful sleep:
❝This study demonstrates that steady pink noise has significant effect on reducing brain wave complexity and inducing more stable sleep time to improve sleep quality of individuals.❞
Source: Pink noise: effect on complexity synchronization of brain activity and sleep consolidation
There may be extra benefits to pink noise, too:
Acoustic Enhancement of Sleep Slow Oscillations and Concomitant Memory Improvement in Older Adults
Rest well!
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
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