An Underrated Tool Against Alzheimer’s
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Dementia in general, and Alzheimer’s in particular, affects a lot of people, and probably even more than the stats show, because some (estimated to be: about half) will go undiagnosed and thus unreported:
Alzheimer’s: The Bad News And The Good
At 10almonds, we often talk about brain health, whether from a nutrition standpoint or other lifestyle factors. For nutrition, by the way, check out:
Today we’ll be looking at some new science for an underrated tool:
Bilingualism as protective factor
It’s well-known that bilingualism offers brain benefits, but most people would be hard-pressed to name what, specifically, those brain benefits are.
As doctors Kristina Coulter and Natalie Phillips found in a recent study, one of the measurable benefits may be a defense against generalized (i.e. not necessarily language-related) memory loss Alzheimer’s disease.
Specifically,
❝We used surface-based morphometry methods to measure cortical thickness and volume of language-related and AD-related brain regions. We did not observe evidence of brain reserve in language-related regions.
However, reduced hippocampal volume was observed for monolingual, but not bilingual, older adults with AD. Thus, bilingualism is hypothesized to contribute to reserve in the form of brain maintenance in the context of AD.❞
Read in full: Bilinguals show evidence of brain maintenance in Alzheimer’s disease
This is important, because while language is processed in various parts of the brain beyond the scope of this article, the hippocampi* are where memory is stored.
*usually mentioned in the singular as “hippocampus”, but you have one on each side, unless some terrible accident or incident befell you.
What this means in practical terms: these results suggest that being bilingual means we will retain more of our capacity for memory, even if we get Alzheimer’s disease, than people who are monolingual.
Furthermore, while we’re talking practicality:
❝…our subsample may be characterized as mostly late bilinguals (i.e., learning an L2 after age 5), having moderate self-reported L2 ability, and relatively few participants reporting daily L2 use (33 out of 119)❞
(L2 = second language)
This is important, because it means you don’t have to have grown up speaking multiple languages, you don’t even have to speak it well, and you don’t have to be using your second language(s) on a daily basis, to enjoy benefits. Merely having them in your head appears to be sufficient to trigger the brain to go “oh, we need to boost and maintain the hippocampal volume”.
We would hypothesize that using second language(s) regularly and/or speaking second language(s) well offers additional protection, and the data would support this if it weren’t for the fact that the sample sizes for daily and high-level speakers are a bit small to draw conclusions.
But the important part is: simply knowing another language, including if you literally just learned it later in life, is already protective of hippocampal volume in the context of Alzheimer’s disease.
Here’s a pop-science article about the study, that goes into it in more detail than we have room to here:
Bilingualism linked to greater brain resilience in older adults
Want to learn a new language?
Here are some options where you can get going right away:
If you are thinking “sounds good, but learning a language is too much work”, then that is why we included that third option there. It’s specifically for one language, and that language is Esperanto, arguably the world’s easiest language and specifically designed to be super quick and easy to get good at. Also, it’s free!
Do, kial ne lerni novan lingvon rapide kaj facile? 😉
Want to know more?
For ways to reduce your overall Alzheimer’s risk according to science, check out:
Take care!
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The Distracted Mind – by Dr. Adam Gazzaley and Dr. Larry Rosen
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Yes, yes, we know, unplug once in a while. But what else do this highly-qualified pair of neuroscientists have to offer?
Rather than being a book for the sake of being a book, with lots of fluff and the usual advice about single-tasking, the authors start with a reframe:
Neurologically speaking, the hit of dopamine we get when looking for information is the exact same as the hit of dopamine that we, a couple of hundred thousand years ago, got when looking for nuts and berries.
- When we don’t find them, we become stressed, and search more.
- When we do find them, we are encouraged and search more nearby, and to the other side of nearby, and near around, to find more.
But in the case of information (be it useful information or celebrity gossip or anything in between), the Internet means that’s always available now.
So, we jitter around like squirrels, hopping from one to the next to the next.
A strength of this book is where it goes from there. Specifically, what evidence-based practices will actually keep our squirrel-brain focused… and which are wishful thinking for anyone who lives in this century.
Bringing original research from their own labs, as well as studies taken from elsewhere, the authors present a science-based toolkit of genuinely useful resources for actual focus.
Bottom line: if you think you could really optimize your life if you could just get on track and stay on track, this is the book for you.
Click here to check out The Distracted Mind, and get yours to focus!
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Test For Whether You Will Be Able To Achieve The Splits
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Some people stretch for years without being able to do the splits; others do it easily after a short while. Are there people for whom it is impossible, and is there a way to know in advance whether our efforts will be fruitful? Liv (of “LivInLeggings” fame) has the answer:
One side of the story
There are several factors that affect whether we can do the splits, including:
- arrangement of the joint itself
- length of tendons and muscles
- “stretchiness” of tendons and muscles
The latter two things, we can readily train to improve. Yes, even the basic length can be changed over time, because the body adapts.
The former thing, however (arrangement of the joint itself) is near-impossible, because skeletal changes happen more slowly than any other changes in the body. In a battle of muscle vs bone, muscle will always win eventually, and even the bone itself can be rebuilt (as the body fixes itself, or in the case of some diseases, messes itself up). However, changing the arrangement of your joint itself is far beyond the auspices of “do some stretches each day”. So, for practical purposes, without making it the single most important thing in your life, it’s impossible.
How do we know if the arrangement of our hip joint will accommodate the splits? We can test it, one side at a time. Liv uses the middle splits, also called the side splits or box splits, as an example, but the same science and the same method goes for the front splits.
Stand next to a stable elevated-to-hip-height surface. You want to be able to raise your near-side leg laterally, and rest it on the surface, such that your raised leg is now perfectly perpendicular to your body.
There’s a catch: not only do you need to still be stood straight while your leg is elevated 90° to the side, but also, your hips still need to remain parallel to the floor—not tilted up to one side.
If you can do this (on both sides, even if not both simultaneously right now), then your hip joint itself definitely has the range of motion to allow you to do the side splits; you just need to work up to it. Technically, you could do it right now: if you can do this on both sides, then since there’s no tendon or similar running between your two legs to make it impossible to do both at once, you could do that. But, without training, your nerves will stop you; it’s an in-built self-defense mechanism that’s just firing unnecessarily in this case, and needs training to get past.
If you can’t do this, then there are two main possibilities:
- Your joint is not arranged in a way that facilitates this range of motion, and you will not achieve this without devoting your life to it and still taking a very long time.
- Your tendons and muscles are simply too tight at the moment to allow you even the half-split, so you are getting a false negative.
This means that, despite the slightly clickbaity title on YouTube, this test cannot actually confirm that you can never do the middle splits; it can only confirm that you can. In other words, this test gives two possible results:
- “Yes, you can do it!”
- “We don’t know whether you can do it”
For more on the anatomy of this plus a visual demonstration of the test, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
Stretching Scientifically – by Thomas Kurz ← this is our review of the book she’s working from in this video; this book has this test!
Take care!
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The Sweet Truth About Diabetes
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There’s A Lot Of Confusion About Diabetes!
For those readers who are not diabetic, nor have a loved one who is diabetic, nor any other pressing reason to know these things, first a quick 101 rundown of some things to understand the rest of today’s main feature:
- Blood sugar levels: how much sugar is in the blood, measured in mg/dL or mmol/L
- Hyperglycemia or “hyper” for short: too much sugar in the blood
- Hypoglycemia or “hypo” for short: too little sugar in the blood
- Insulin: a hormone that acts as a gatekeeper to allow sugar to pass, or not pass, into various parts of the body
- Type 1 diabetes (sometimes capitalized, and/or abbreviated to “T1D”) is an autoimmune disorder that prevents the pancreas from being able to supply the body with insulin. This means that taking insulin consistently is necessary for life.
- Type 2 diabetes is a matter of insulin resistance. The pancreas produces plenty of insulin, but the body has become desensitized to it, so it doesn’t work properly. Taking extra insulin may sometimes be necessary, but for many people, it can be controlled by means of a careful diet and other lifestyle factors.
With that in mind, on to some very popular myths…
Diabetes is caused by having too much sugar
While sugar is not exactly a health food, it’s not the villain of this story either.
- Type 1 diabetes has a genetic basis, triggered by epigenetic factors unrelated to sugar.
- Type 2 diabetes comes from a cluster of risk factors which, together, can cause a person to go through pre-diabetes and acquire type 2 diabetes.
- Those risk factors include:
- A genetic predisposition
- A large waist circumference
- (this is more relevant than BMI or body fat percentage)
- High blood pressure
- A sedentary lifestyle
- Age (the risk starts rising at 35, rises sharply at 45, and continues upwards with increasing age)
- Those risk factors include:
Read more: Risk Factors for Type 2 Diabetes
Diabetics can’t have sugar
While it’s true that diabetics must be careful about sugar (and carbs in general), it’s not to say that they can’t have them… just: be mindful and intentional about it.
- Type 1 diabetics will need to carb-count in order to take the appropriate insulin bolus. Otherwise, too little insulin will result in hyperglycemia, or too much insulin will result in hypoglycemia.
- Type 2 diabetics will often be able to manage their blood sugar levels with diet alone, and slow-release carbs will make this easier.
In either case, having quick release sugars will increase blood sugar levels (what a surprise), and sometimes (such as when experiencing a hypo), that’s what’s needed.
Also, when it comes to sugar, a word on fruit:
Not all fruits are equal, and some fruits can help maintain stable blood sugar levels! Read all about it:
Fruit Intake to Prevent and Control Hypertension and Diabetes
Artificial sweeteners are must-haves for diabetics
Whereas sugar is a known quantity to the careful diabetic, some artificial sweeteners can impact insulin sensitivity, causing blood sugars to behave in unexpected ways. See for example:
The Impact of Artificial Sweeteners on Body Weight Control and Glucose Homeostasis
If a diabetic person is hyper, they should exercise to bring their blood sugar levels down
Be careful with this!
- In the case of type 2 diabetes, it may (or may not) help, as the extra sugar may be used up.
- Type 1 diabetes, however, has a crucial difference. Because the pancreas isn’t making insulin, a hyper (above a certain level, anyway) means more insulin is needed. Exercising could do more harm than good, as unlike in type 2 diabetes, the body has no way to use that extra sugar, without the insulin to facilitate it. Exercising will just pump the syrupy hyperglycemic blood around the body, potentially causing damage as it goes (all without actually being able to use it).
There are other ways this can be managed that are outside of the scope of this newsletter, but “be careful” is rarely a bad approach.
Read more, from the American Diabetes Association:
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The Uses of Delusion – by Dr. Stuart Vyse
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Most of us try to live rational lives. We try to make the best decisions we can based on the information we have… And if we’re thoughtful, we even try to be aware of common logical fallacies, and overcome our personal biases too. But is self-delusion ever useful?
Dr. Stuart Vyse, psychologist and Fellow for the Committee for Skeptical Inquiry, argues that it can be.
From self-fulfilling prophecies of optimism and pessimism, to the role of delusion in love and loss, Dr. Vyse explores what separates useful delusion from dangerous irrationality.
We also read about such questions as (and proposed answers to):
- Why is placebo effect stronger if we attach a ritual to it?
- Why are negative superstitions harder to shake than positive ones?
- Why do we tend to hold to the notion of free will, despite so much evidence for determinism?
The style of the book is conversational, and captivating from the start; a highly compelling read.
Bottom line: if you’ve ever felt yourself wondering if you are deluding yourself and if so, whether that’s useful or counterproductive, this is the book for you!
Click here to check out The Uses of Delusion, and optimize yours!
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Can You Repair Your Own Teeth At Home?
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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 liked your article on tooth remineralization, I saw a “home tooth repair kit”, and wondered if it is as good as what dentists do, or at least will do the job well enough to save a dentist visit?❞
Firstly, for any wondering about the tooth remineralization, here you go:
Tooth Remineralization: How To Heal Your Teeth Naturally
Now, to answer your question, we presume you are talking about something like this kit available on Amazon. In which case, some things to bear in mind:
- This kind of thing is generally intended as a stop-gap measure until you see a dentist, because you cracked your tooth or lost a filling or something today, and will see the dentist next week, say.
- This kind of thing is not what Dr. Michelle Jorgensen was talking about in another video* that we wrote about; rather, it is using a polymer filler to rebuild what is missing. The key difference is: this is using plastic, which is not what your teeth are made of, so it will never “take” as part of the tooth, as some biomimetic dentistry options can do.
- Yes, this does also mean you are putting microplastics (because the powder is usually micronized polymer beads with zinc oxide, to which you add a liquid to create a paste that will set) in your mouth and quite possibly right next to an open blood supply depending on what’s damaged and whether capillaries were reaching it.
- Because of the different material and application method, the adhesion is nothing like professional fillings (be they metal or resin), and thus the chances of it coming out again or so high that it’s more a question of when, rather than if.
- If you have damage under there (as we presume you do in any scenario where you are using this), then if it’s not professionally cleaned before the filling goes in, then it can get infected, and (less dramatically, but still importantly) any extant decay can also get worse. We say “professionally”, because you will not be able to do an adequate job with your toothbrush, floss, etc at home, and even if you got dentist’s tools (which you can buy, by the way, but we don’t recommend), you will no more be able to do the same quality job as a dentist who has done that many times a day every day for the past 20 years, as buying expensive paintbrushes would make you able to restore a Renaissance painting without messing it up.
*See: Dangers Of Root Canals And Crowns, & What To Do Instead ← what she recommends instead is biomimetic dentistry, which is also more prosaically called “conservative restorative dentistry”, i.e. it tries to conserve as much as possible, replace lost material on a like-for-like basis, and generally end up with a result that’s as close to natural as possible.
In other words, the short answer to your question is “no, sorry, it isn’t and it won’t”
However! A just like it’s good to have a first aid kit in the house even if it won’t do the same job as an ambulance crew, it can be good to have a tooth repair kit (essentially, a tooth first-aid kit) in the house, precisely to use it just as a stop-gap measure in the event that you one day crack a tooth or lose a filling or such, and don’t want to leave it open to all things in the meantime.
(The results of this sort of kit are so not long-term in nature that it will be quick and easy for your dentist to remove it to do their own job once you get there)
If in doubt, always see your dentist as soon as possible, as many things are a lot less work to treat now, than to treat later. Just, make sure to advocate for yourself and what you actually want/need, and don’t let them upsell you on something you didn’t come in for while you’re sitting in their chair—that’s a conversation to be had in advance with a clear head and no pressure (and nobody’s hands in your mouth)!
See also: Dentists Are Pulling ‘Healthy’ and Treatable Teeth To Profit From Implants, Experts Warn
Take care!
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Practical Programming for Strength Training – by Mark Rippetoe & Andy Baker
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Strength training is an important part of overall health maintenance, but it can be hard to find a good guide to progressive strength improvement that isn’t a bodybuilding book.
This one gives a ground-upwards approach, explaining small details to even quite basic things, before taking the reader through to more advanced progressions, and how to get the most strength-building out of each exercise over time.
As such, this is a good book for anyone of any level from beginner to quite experienced, and you can hop in at any point since there are always catch-up summaries and/or reiterations of the previous concepts that we’re now building on from.
The authors do also talk nutrition, hormones, and so forth, but most of it is about the exercises and the progressions thereof.
There is a slightly patronizing chapter towards the end, about “special populations”, for example offering “novice and intermediate training for women”, but it doesn’t take away from the majority of the book, as the exercises don’t care about your gender. Muscles are muscles, and we all start from wherever we are. Yes, testosterone boosts muscle mass, but let’s face it, there are a lot of women in the world who are stronger than a lot of men.
One thing to bear in mind is that a lot of this is barbell training, so you will need a barbell (or access to one at a gym). If purely bodyweight training is your preference, or perhaps some other form of weightlifting (e.g. kettlebells or such) then this isn’t the book for that.
Bottom line: if strength training is your focus and you like barbells, then this is a great book to take you quite a way along that road.
Click here to check out Practical Programming For Strength Training, and get stronger!
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Learn to Age Gracefully
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