Brain Benefits in 3 Months…through walking?
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Keeping it Simple
Today’s video (below) is another Big Think production (can you tell that we love their work?). Wendy Suzuki does a wonderful job of breaking down the brain benefits of exercise into three categories, within three minutes.
The first question to ask yourself is: what is your current level of fitness?
Low Fitness
Exercising, even if it’s just going on a walk, 2-3 times a week improves baseline mood state, as well as enhances prefrontal and hippocampal function. These areas of the brain are crucial for complex behaviors like planning and personality development, as well as memory and learning.
Mid Fitness
The suggested regimen is, without surprise, to slightly increase your regular workouts over three months. Whilst you’re already getting the benefits from the low-fitness routine, there is a likelihood that you’ll increase your baseline dopamine and serotonin levels–which, of course, we love! Read more on dopamine here, here, or here.
High Fitness
If you consider yourself in the high fitness bracket then well done, you’re doing an amazing job! Wendy Suzuki doesn’t make many suggestions for you; all she mentions is that there is the possibility of “too much” exercise actually having negative effects on the brain. However, if you’re not competing at an Olympic level, you should be fine.
Fitness and Exercise in General
Of course, fitness and exercise are both very broad terms. We would suggest that you find an exercise routine that you genuinely enjoy–something that is easy to continue over the long term. Try browsing different areas of exercise to see what resonates with you. For instance, Total Fitness After 40 is a great book on all things fitness in the second half of your life. Alternatively, search through our archive for fitness-related material.
Anyway, without further ado, here is today’s video:
How was the video? If you’ve discovered any great videos yourself that you’d like to share with fellow 10almonds readers, then please do email them to us!
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The Minerals That Neutralize Viruses (While Being Harmless To Humans)
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Researchers in Estonia and Sweden (it was a joint project, with five researchers from each country) have found a way to use titanium dioxide nanoparticles to neutralize viruses, including COVID & flu.
Titanium dioxide, yes, the common additive to foods, cosmetics, and more (in most cases, added as a non-bleaching whitening agent—simply, titanium dioxide is body-safe, white in color, and very reflective, making it a brilliant, shiny white). Also used in sunscreens, for its excellent safety profile and again, its full-spectrum reflectiveness.
See also: Who Screens The Sunscreens?
How it works
Some viruses, including coronaviruses and influenza viruses, have an outer layer that’s a lipid membrane. The researchers found (by testing against multiple viruses, and by using a control of silicotungstate polyoxymethalate nanoparticles), that the ability of titanium dioxide to bind to phospholipids (and ability that the silicotungstate polyoxymethalate doesn’t have) means that the nanoparticles bind to the virus’s outer case, thus preventing it from effectively entering human cells (which it needs to do in order to infect the host, as this is how viruses replicate themselves).
What this means, in practical terms
While more research will be needed to know whether this can be used in the medicinal sense, it already means that a nanoparticle spray can be used to create virus-neutralizing layers on surfaces and in air filters. This alone could greatly reduce transmission in enclosed spaces such as public transport (ranging from taxis to airplanes), as well as other places where people get packed into a small space.
If you have an air purifier at home, keep an eye out for when improved filters arrive on the market!
See also: What’s Lurking In Your Household Air?
Wait, you said “minerals”; are there more?
It seems so, but we can’t truly say for sure until they’ve been tested. However, the researchers see no reason why other small metal oxides that bind strongly to phospholipids shouldn’t work exactly the same way—which would include iron oxide (yes, as in rust) and aluminum oxide (the coating that automatically forms immediately when aluminum is exposed to oxygen (aluminum is so reactive to oxygen, that it’s almost impossible to get aluminum without an oxidized surface, unless you use something else to coat it, or cut it in an oxygen-free atmosphere and keep it there).
You can read the paper itself here:
Molecular mechanisms behind the anti corona virus activity of small metal oxide nanoparticles
And on a related note (different scientists, different science, similar principle, though, using mineral nanotechnology to kill microbes):
❝Researchers report that laboratory tests of their nanoflower-coated dressings demonstrate antibiotic, anti-inflammatory and biocompatible properties. They say these results show these tannic acid and copper(II) phosphate sprouted nanoflower bandages are promising candidates for treating infections and inflammatory conditions.❞
Read in full: This delicate nanoflower is downright deadly to bacteria
Want to learn more?
Check out:
Move over, COVID and Flu! We Have “Hybrid Viruses” To Contend With Now
Take care!
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Cardiac Failure Explained – by Dr. Warrick Bishop
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The cover of this book makes it look like it’ll be a flashy semi-celebrity doctor keen to sell his personalized protocol, along with eleventy-three other books, but actually, what’s inside this one is very different:
We (hopefully) all know the basics of heart health, but this book takes it a lot further. Starting with the basics, then the things that it’s easy to feel like you should know but actually most people don’t, then into much more depth.
The format is much more like a university textbook than most pop-science books, and everything about the way it’s written is geared for maximum learning. The one thing it does keep in common with pop-science books as a genre is heavy use of anecdotes to illustrate points—but he’s just as likely to use tables, diagrams, callout boxes, emboldening of key points, recap sections, and so forth. And for the most part, this book is very information-dense.
Dr. Bishop also doesn’t just stick to what’s average, and talks a lot about aberrations from the norm, what they mean and what they do and yes, what to do about them.
On the one hand, it’s more information dense than the average reader can reasonably expect to need… On the other hand, isn’t it great to finish reading a book feeling like you just did a semester at medical school? No longer will you be baffled by what is going on in your (or perhaps a loved one’s) cardiac health.
Bottom line: if you’d like to know cardiac health inside out, this book is an excellent place to start.
Click here to check out Cardiac Failure Explained, and get to the heart of things!
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Reduce Your Stroke Risk
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❝Each year in the U.S., over half a million people have a first stroke; however, up to 80% of strokes may be preventable.❞
~ American Stroke Association
Source: New guideline: Preventing a first stroke may be possible with screening, lifestyle changes
So, what should we do?
Some of the risk factors are unavoidable or not usefully avoidable, like genetic predispositions and old age, respectively (i.e. it is possible to avoid old age—by dying young, which is not a good approach).
Some of the risk factors are avoidable. Let’s look at the most obvious first:
You cannot drink to your good health
While overall, the World Health Organization has declared that “the only safe amount of alcohol is zero”, when it comes to stroke risk specifically, it seems that low consumption is not associated with stroke, while moderate to high consumption is associated with a commensurately increased risk of stroke:
Alcohol Intake as a Risk Factor for Acute Stroke
Note: there are some studies out there that say that a low to moderate consumption may decrease the risk compared to zero consumption. However, any such study that this writer has seen has had the methodological flaw of not addressing why those who do not drink alcohol, do not drink it. In many cases, someone who drinks no alcohol at all does so because either a) it would cause problems with some medication(s) they are taking, or b) they used to drink heavily, and quit. In either case, their reasons for not drinking alcohol may themselves be reasons for an increased stroke risk—not the lack of alcohol itself.
Smoke now = stroke later
This one is straightforward; smoking is bad for pretty much everything, and that includes stroke risk, as it’s bad for your heart and brain both, increasing stroke risk by 200–400%:
Smoking and stroke: the more you smoke the more you stroke
So, the advice here of course is: don’t smoke
Diet matters
The American Stroke Association’s guidelines recommend, just for a change, the Mediterranean Diet. This does not mean just whatever is eaten in the Mediterranean region though, and there are specifically foods that are included and excluded, and the ratios matter, so here’s a run-down of what the Mediterranean Diet does and doesn’t include:
The Mediterranean Diet: What Is It Good For? ← what isn’t it good for?!
You can outrun stroke
Or out-walk it; that’s fine too. Most important here is frequency of exercise, more than intensity. So basically, getting those 150 minutes moderate exercise per week as a minimum.
See also: The Doctor Who Wants Us To Exercise Less & Move More
Which is good, because it means we can get a lot of exercise in that doesn’t feel like “having to do” exercise, for example:
Do You Love To Go To The Gym? No? Enjoy These “No-Exercise Exercises”!
Your brain needs downtime too
Your brain (and your heart) both need you to get good regular sleep:
Sleep Disorders in Stroke: An Update on Management
We sometimes say that “what’s good for your heart is good for your brain” (because the heart feeds the brain, and also ultimately clears away detritus), and that’s true here too, so we might also want to prioritize sleep regularity over other factors, even over duration:
How Regularity Of Sleep Can Be Even More Important Than Duration ← this is about adverse cardiovascular events, including ischemic stroke
Keep on top of your blood pressure
High blood pressure is a very modifiable risk factor for stroke. Taking care of the above things will generally take care of this, especially the DASH variation of the Mediterranean diet:
Hypertension: Factors Far More Relevant Than Salt
However, it’s still important to actually check your blood pressure regularly, because sometimes an unexpected extra factor can pop up for no obvious reason. As a bonus, you can do this improved version of the usual blood pressure test, still using just a blood pressure cuff:
Try This At Home: ABI Test For Clogged Arteries
Consider GLP-1 receptor agonists (or…)
GLP-1 receptor agonists (like Ozempic et al.) seem to have cardioprotective and neuroprotective (thus: anti-stroke) activity independent of their weight loss benefits:
Of course, GLP-1 RAs aren’t everyone’s cup of tea, and they do have their downsides (including availability, cost, and the fact benefits reverse themselves if you stop taking them), so if you want a similar effect from a natural approach, there are some foods that work on the body’s incretin responses in the same way as GLP-1 RAs do:
5 Foods That Naturally Mimic The “Ozempic Effect”
Better to know sooner rather than too late
Rather than waiting until one half of our face is drooping to know that there was a stroke risk, here are things to watch out for to know about it before it’s too late:
6 Signs Of Stroke (One Month In Advance)
Take care!
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The Body: A Guide for Occupants – by Bill Bryson
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Better known for his writings on geography and history, here Bryson puts his mind to anatomy and physiology. How well does he do?
Very well, actually—thanks no doubt to the oversight of the veritable flock of consulting scientists mentioned in the acknowledgements. To this reviewer’s knowledge, no mistakes made it through into publication.
That said, Bryson’s love of history does shine through, and in this case, the book is as much a telling of medical history, as it is of the human body. That’s a feature not a bug, though, as not only is it fascinating in and of itself, but also, it’d be difficult to fully understand where we’re at in science, without understanding how we got here.
The style of the book is easy-reading narrative prose, but packed with lots of quirky facts, captivating anecdotes, and thought-provoking statistics. For example:
- The least effective way to spread germs is kissing. It proved ineffective among volunteers (in what sounds like a fun study) who had been successfully infected with the cold virus. Sneezes and coughs weren’t much better. The only really reliable way to transfer cold germs was physically by touch.
- The United States has 4% of the world’s population but consumes 80% of its opiates.
- Allowing a fever to run its course (within limits) could be the wisest thing. An increase of only a degree or so in body temperature slows the replication rate of viruses by a factor of 200.
Still, these kinds of things are woven together so well, that it doesn’t feel at all like reading a trivia list!
Bottom line: if you’d like to know a lot more about anatomy and physiology, but prefer a very casual style rather than sitting down with a stack of textbooks, this book is a great option.
Click here to check out The Body, and learn more about yours!
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Do We Need Sunscreen In Winter, Really?
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It’s Q&A Day at 10almonds!
Have a question or a request? We love to hear from you!
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 keep seeing advice that we shoudl wear sunscreen out in winter even if it’s not hot or sunny, but is there actually any real benefit to this?❞
Short answer: yes (but it’s indeed not as critical as it is during summer’s hot/sunny days)
Longer answer: first, let’s examine the physics of summer vs winter when it comes to the sun…
In summer (assuming we live far enough from the equator to have this kind of seasonal variation), the part of the planet where we live is tilted more towards the sun. This makes it closer, and more importantly, it’s more directly overhead during the day. The difference in distance through space isn’t as big a deal as the difference in distance through the atmosphere. When the sun is more directly overhead, its rays have a shorter path through our atmosphere, and thus less chance of being blocked by cloud cover / refracted elsewhere / bounced back off into space before it even gets that far.
In winter, the opposite of all that is true.
Morning/evening also somewhat replicate this compared to midday, because the sun being lower in the sky has a similar effect to seasonal variation causing it to be less directly overhead.
For this reason, even though visually the sun may be just as bright on a winter morning as it is on a summer midday, the rays have been filtered very differently by the time they get to us.
This is one reason why you’re much less likely to get sunburned in the winter, compared to the summer (others include the actual temperature difference, your likely better hydration, and your likely more modest attire protecting you).
However…
The reason it is advisable to wear sunscreen in winter is not generally about sunburn, and is rather more about long-term cumulative skin damage (ranging from accelerated aging to cancer) caused by the UV rays—specifically, mostly UVA rays, since UVB rays (with their higher energy but shorter wavelength) have nearly all been blocked by the atmosphere.
Here’s a good explainer of that from the American Cancer Society:
UV (Ultraviolet) Radiation and Cancer Risk
👆 this may seem like a no-brainer, but there’s a lot explained here that demystifies a lot of things, covering ionizing vs non-ionizing radiation, x-rays and gamma-rays, the very different kinds of cancer caused by different things, and what things are dangerous vs which there’s no need to worry about (so far as best current science can say, at least).
Consequently: yes, if you value your skin health and avoidance of cancer, wearing sunscreen when out even in the winter is a good idea. Especially if your phone’s weather app says the UV index is “moderate” or above, but even if it’s “low”, it doesn’t hurt to include it as part of your skincare routine.
But what if sunscreens are dangerous?
Firstly, not all sunscreens are created equal:
Learn more: Who Screens The Sunscreens?
Secondly: consider putting on a protective layer of moisturizer first, and then the sunscreen on top. Bear in mind, this is winter we’re talking about, so you’re probably not going out in a bikini, so this is likely a face-neck-hands job and you’re done.
What about vitamin D?
Humans evolved to have more or less melanin in our skin depending on where we lived, and white people evolved to wring the most vitamin D possible out of the meagre sun far from the equator. Black people’s greater melanin, on the other hand, offers some initial protection against the sun (but any resultant skin cancer is then more dangerous than it would be for white people if it does occur, so please do use sunscreen whatever your skintone).
Nowadays many people live in many places which may or may not be the places we evolved for, and so we have to take that into account when it comes to sun exposure.
Here’s a deeper dive into that, for those who want to learn:
Take care!
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Give Your Adrenal Glands A Chance
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The Hats Of Wrath
Your adrenal glands are two little hat-shaped glands that sit on top of your kidneys (like your kidneys are wearing them as hats, in fact).
They produce adrenaline, as you might have guessed, and also cortisol and aldosterone, which you might or might not have known, as well as some miscellaneous corticosteroids that are beyond the scope of today’s article.
Fun fact! For a long time, doctors thought adrenal glands were much larger than they usually are, because of learning anatomy from corpses that were dissected, but invariably the corpses were those of poor people, especially criminals, whose adrenal glands were almost always overworked and swollen.
You don’t want yours to be like that.
What goes wrong
Assuming you don’t have a rare disorder like Addison’s disease (in which the adrenal glands don’t produce enough of the hormones they’re supposed to), your adrenal glands will usually not have trouble producing enough adrenaline et al.
However, as we learned from the Victorian vagabonds, they can also have no problems producing too much—much like any organ that gets overworked, however, this has consequences.
Hopefully you’re not living a life of stressful crime on the streets, but maybe you have other reasons your adrenal glands are working overtime, such as any source of chronic stress, bad sleep (can’t recharge without this downtime), overuse of stimulants (including caffeine and/or nicotine), and, counterintuitively, alcohol. All these things can tax the adrenal glands considerably.
When this happens, in the extreme we can get Cushing’s syndrome, characterized by the symptoms: hypertension, cortisol-based fat distribution i.e. especially face and abdomen, weakness, fragile easily irritable skin, hair loss and/or hirsutism, paradoxically, and of course general fatigue.
In the non-extreme, we get all the same symptoms just to a lower level, and experience what the medical profession is begging us not to call “Adrenal Fatigue Syndrome” because that’s not an official diagnosis, whereas if it gets a name then they’ll be expected to treat it.
What keeps things going right
Obviously, the opposite of the above, for a start. Which means:
Manage chronic stress; see: How To Manage Chronic Stress
Get good sleep; see: Why You Probably Need More Sleep
Go easy on the caffeine; see: Caffeine Mythbusting
Skip the nicotine; see: Nicotine Benefits (That We Don’t Recommend)!
Avoid alcohol; see: How To Reduce Or Quit Alcohol
There are specific vitamins and minerals that support adrenal health too; they are: vitamins B5, B6, B12, C, & D, and also magnesium and zinc.
Good dietary sources of the above include green leafy things, cruciferous vegetables*, nuts and seeds, avocados, olive oil, and if you eat fish, then also fatty fish.
In contrast, it is good to cut down (or avoid entirely) red meat and unfermented dairy.
*Unsure how to get cruciferous vegetables in more often? Try today’s featured recipe, superfood broccoli pesto
Want to know more?
A large part of adrenal health is about keeping cortisol levels down generally (except: for most of us, we can have a little hormesis, as a treat), so for the rest of that you might like to read:
Lower Your Cortisol! (Here’s Why & How)
Take care!
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