Genius Gut – by Dr. Emily Leeming
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When it comes to the gut-brain information interchange, 90% of it is the gut talking to the brain (the brain is a good listener). As such, one of the best things we can do for our brain is ensure our gut has good things to say.
Dr. Leeming talks us through doing a quick initial assessment to judge the general goodness/badness of our current gut situation (based on output, not input, so it’s about the actual goodness/badness, not what we expect it should be), before going on to explain a lot of the anatomy and physiology at hand.
The hacks themselves may be, in their titles, things you already know—but where the real value of this book lies is in all the data and science collated under each of those hacks, allowing the reader to optimize everything rather than just guessing. Which can mean optimize by doing things as close to perfectly as possible, or it can mean optimize by doing/using the things that get the best results for the minimum effort. It’s up to you!
The style is very casual and friendly, even conversational, while not skimping on science (and indeed, citations are frequently provided for such).
Bottom line: if you’d like to improve your gut health, especially with the goal of improving your brain health, this is an excellent book for that.
Click here to check out Genius Gut, and make yours better for you!
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Sugar, Hazelnuts, Books & Brains
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It’s Q&A Day!
Each Thursday, we respond to subscriber questions and requests! If it’s something small, we’ll answer it directly; if it’s something bigger, we’ll do a main feature in a follow-up day instead!
So, no question/request to big or small; they’ll just get sorted accordingly
Remember, you can always hit reply to any of our emails, or use the handy feedback widget at the bottom. We always look forward to hearing from you!
Q: Interesting info, however, I drink hazelnut milk LOL so would have liked a review of that. But now I want to give hemp and pea milks a try. Thanks
Aww! Here then just for you, is a quick rundown…
- Pros: high in protein¹, vitamin B, and vitamin E
- Cons: high in fat², low in calcium
¹Compared head-to-head with almond milk for example, it has double the protein (but also double the calories)
²However, is also has been found to lower LDL (bad) cholesterol (and incidentally, also reduce inflammation), and in a later systematic review, it was found to not correlate to weight gain, despite its high calorie-content.
If you don’t already, and would like to try making your own…
Click here for step-by-step instructions to make your own hazelnut milk! (very simple)
Q: Wondering if you can evaluate CLA and using it to assist with weight loss. Thanks
Will do! (Watch this space)
Q: What’s the process behind the books you recommend? You seem to have a limitless stream of recommendations
We do our best!
The books we recommend are books that…
- are on Amazon—it makes things tidy, consistent, and accessible. And if you end up buying one of the books, we get a small affiliate commission*.
- we have read—we would say “obviously”, but you might be surprised how many people write about books without having read them.
- pertain in at least large part to health and/or productivity.
- are written by humans—bookish people (and especially Kindle Unlimited users) may have noticed lately that there are a lot of low quality AI-written books flooding the market, sometimes with paid 5-star reviews to bolster them. It’s frustrating, but we can tell the difference and screen those out.
- are of a certain level of quality. They don’t have to be “top 5 desert-island books”, because well, there’s one every day and the days keep coming. But they do have to genuinely deliver the value that we describe, and merit a sincere recommendation.
- are varied—we try to not give a run of “samey” books one after another. We will sometimes review a book that covers a topic another previously-reviewed book did, but it must have something about it that makes it different. It may be a different angle or a different writing style, but it needs something to set it apart.
*this is from Amazon and isn’t product-specific, so this is not affecting our choice of what books to review at all—just that they will be books that are available on Amazon.
Q: Great video on dopamine. Thumbs up on the book recommendation. Would you please consider doing a piece or two on inflammation? I live with Lupus and it is a constant struggle. Thanks for the awesome work you do. Have an excellent day.
Great suggestion! We will do that, and thank you for the kind words!
Q: Why is your newsletter called 10almonds? Maybe I missed it in the intro email, but my curiosity wants to know the significance. Thanks!”
It’s a reference to a viral Facebook hoax! There was a post going around that claimed:
❝HEADACHE REMEDY. Eat 10–12 almonds, the equivalent of two aspirins, next time you have a headache❞ ← not true!
It made us think about how much health-related disinformation there was online… So, calling ourselves 10almonds was a bit of a tongue-in-cheek reference to that story… but also a reminder to ourselves:
We must always publish information with good scientific evidence behind it!
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How To Engage Your Whole Brain
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The Stroke Of Insight That Nobody Wants
This is Dr. Jill Bolte Taylor. She’s a neuroanatomist, who, at the age of 37 (when she was a post-doctoral fellow at Harvard Medical School), had what she refers to as her “stroke of insight”.
That is to say, she had a massive stroke, and after a major brain surgery to remove a clot the size of a golf ball, she spent the next 8 years re-learning to do everything.
Whereas previously she’d been busy mapping the brain to determine how cells communicate with each other, now she was busy mapping whether socks or shoes should go on first. Needless to say, she got an insight into neuroplasticity that few people would hope for.
What does she want us to know?
Dr. Taylor (now once again a successful scientist, lecturer, and author) advocates for “whole brain living”, which involves not taking parts of our brain for granted.
About those parts…
Dr. Taylor wants us to pay attention to all the parts regardless of size, ranging from the two hemispheres, all the way down to the billions of brain cells, and yet even further, to the “trillions of molecular geniuses”—because each brain cell is itself reliant on countless molecules of the many neurochemicals that make up our brain.
For a quick refresher on some of the key players in that latter category, see our Neurotransmitter Cheatsheet 😎
When it comes to the hemispheres, there has historically been a popular belief that these re divided into:
- The right brain: emotional, imaginative, creative, fluid feeling
- The left brain: intellectual, analytical, calculating, crystal thinking
…which is not true, anatomically speaking, because there are cells on both sides doing their part of both of these broad categories of brain processes.
However, Dr. Taylor found, while one hemisphere of her brain was much more damaged than the other, that nevertheless she could recover some functions more quickly than others, which, once she was able to resume her career, inspired her model of four distinct ways of cogitating that can be switched-between and played with or against each other:
Meet The Four Characters Inside Your Brain
Why this matters
As she was re-learning everything, the way forward was not quick or easy, and she also didn’t know where she was going, because for obvious reasons, she couldn’t remember, much less plan.
Looking backwards after her eventual full recovery, she noted a lot of things that she needed during that recovery, some of which she got and some of which she didn’t.
Most notably for her, she needed the right kind of support that would allow all four of the above “characters” as she puts it, to thrive and grow. And, when we say “grow” here we mean that literally, because of growing new brain cells to replace the lost ones (as well as the simple ongoing process of slowly replacing brain cells).
For more on growing new brain cells, by the way, see:
How To Grow New Brain Cells (At Any Age)
In order to achieve this in all of the required brain areas (i.e., and all of the required brain functions), she also wants us to know… drumroll please…
When to STFU
Specifically, the ability to silence parts of our brain that while useful in general, aren’t necessarily being useful right now. Since it’s very difficult to actively achieve a negative when it comes to brain-stuff (don’t think of an elephant), this means scheduling time for other parts of our brain to be louder. And that includes:
- scheduling time to feel (emotionally)
- scheduling time to feel (gut feelings)
- scheduling time to feel (kinesthetically)
…amongst others.
Note: those three are presented in that order, from least basic to most basic. And why? Because, clever beings that we are, we typically start from a position that’s not remotely basic, such as “overthinking”, for example. So, there’s a wind-down through thinking just the right amount, thinking through simpler concepts, feeling, noticing one’s feelings, noticing noticing one’s feelings, all the way down to what, kinesthetically, are we actually physically feeling.
❝It is interesting to note that although our limbic system fucntions throughout our lifetime, it does not mature. As a result, when our emotional “buttons” are pushed, we retain the ability to react to incoming stimulation as though we were a two-year-old, even when we are adults.❞
~ Dr. Jill Taylor
Of course, sometimes the above is not useful, which is why the ability to switch between brain modes is a very important and useful skill to develop.
And how do we do that? By practising. Which is something that it’s necessary to take up consciously, and pursue consistently. When children are at school, there are (hopefully, ideally) curricula set out to ensure they engage and train all parts of their brain. As adults, this does not tend to get the same amount of focus.
“Children’s brains are still developing”—indeed, and so are adult brains:
The Brain As A Work-In-Progress
Dr. Taylor had the uncommon experience of having to, in many ways, neurologically speaking, redo childhood. And having had a second run at it, she developed an appreciation of the process that most of us didn’t necessarily get when doing childhood just the once.
In other words: take the time to feel stuff; take the time to quiet down your chatty mind, take the time engage your senses, and take it seriously! Really notice, as though for the first time, what the texture of your carpet is like. Really notice, as though for the first time, what it feels like to swallow some water. Really notice, as though for the first time, what it feels like to experience joy—or sadness, or comfort, or anger, or peace. Exercise your imagination. Make some art (it doesn’t have to win awards; it just has to light up your brain!). Make music (again, it’s about wiring your brain in your body, not about outdoing Mozart in composition and/or performance). Make changes! Make your brain work in the ways it’s not in the habit of doing.
If you need a little help switching off parts of your brain that are being too active, so that you can better exercise other parts of your brain that might otherwise have been neglected, you might want to try:
Enjoy!
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Seasonal Affective Disorder (Beyond Sunlight!)
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For those of us in the Northern Hemisphere, the time of increasing darkness is upon us again. Depending on our latitude, the sun barely rises before it skitters off again. And depending on other factors of our geography, we might not get much sun during that time (writer’s example: the ancient bog from which I write has been surrounded by fog for two weeks now).
So, what to do about it?
Firstly, we can make the most of whatever sun we do get (especially in the morning, if possible), and we can of course make some use of artificial sunlight. To save doubling up, we’ll link to what we previously wrote about optimizing both of those things:
‘Tis To Season To Be SAD-Savvy
More ways to get serotonin
Sunlight, of course, triggers our bodies to make serotonin, and hence we often make less of it during winter. But, there are other ways to get serotonin too, and one of the best ways is spending time in nature. Yes, even if the weather is gloomy, provided there are still visible green things and you are seeing them, it will promote serotonin production.
Of course, it may not be the season for picnics, but a morning walk through a local park or other green space is ideal.
On which note, gardening remains a good activity. Not a lot of people do so much gardening after a certain point in the year, but in one way, it’s more important than ever to get some soil under your fingernails:
There are bacteria in soil (specifically: Mycobacterium vaccae) that work similarly to antidepressants.
When something is described as having an effect similar to antidepressants, it’s usually hyperbole. In this case, it’s medicine, and literally works directly on the serotonergic system (as do many, but not all, antidepressants).
See also: Antidepressants: Personalization Is Key!
While many antidepressants are selective serotonin uptake inhibitors (i.e., they slow the rate at which your brain loses serotonin), Mycobacterium vaccae increases the rate at which you produce serotonin. So, you feel happier, more relaxed, while also feeling more energized.
^this one’s a mouse study, but we’re including it because it covers exactly how it works in the brain, which is something that the ethics board wouldn’t let them do on humans, due to the need for slicing the brains up for examination.
As to how to benefit: touching soil will get you “infected” by the bacteria, yes, even if you wash your hands later. Growing food in the soil and eating the good (including if you wash and cook it) is even better.
Boost the other “happiness chemicals”
Serotonin is just one “happiness hormone”, other feel-good neurotransmitters that are just as important include dopamine and oxytocin.
Dopamine is most associated with being the “reward chemical”, so it pays to do things that you find rewarding. If you’re stuck for ideas, engaging in small acts of kindness is a sure-fire way to get dopamine flowing and lift your own mood as well as theirs.
See also: 10 Ways To Naturally Boost Dopamine
Oxytocin, meanwhile is the “cuddle chemical”, and can be triggered even if you have nobody to cuddle*. If you do, by the way, make it at least 20–30 seconds, as that’s generally how long it takes to get oxytocin flowing.
*Vividly imagining it has much the same effect, since the brain can’t tell the difference. Alternatively, looking at pictures/videos (your choice) of small cute animals tends to work for most people also.
For more on these things, check out: Neurotransmitter Cheatsheet
Take care!
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6-Minute Core Strength – by Dr. Jonathan Su
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.
We don’t normally do author biographies here, but in this case it’s worth noting that Dr. Su is a physiotherapist, military rehab expert, and an IAYT yoga therapist. So, these things together certainly do lend weight to his advice.
About the “6-minute” thing: this is in the style of the famous “7-minute workout” and “5 Minutes’ Physical Fitness” etc, and refers to how long each exercise session should take. The baseline is one such session per day, though of course doing more than one set of 6 minutes each time is a bonus if you wish to do so.
The exercises are focused on core strength, but they also include hip and shoulder exercises, since these are after all attached to the core, and hip and shoulder mobility counts for a lot.
A particular strength of the book is in troubleshooting mistakes of the kind that aren’t necessarily visible from photos; in this case, Dr. Su explains what you need to go for in a certain exercise, and how to know if you are doing it correctly. This alone is worth the cost of the book, in this reviewer’s opinion.
Bottom line: if you want core strength and want it simple yet comprehensive, this book can guide you.
Click here to check out 6-Minute Core Strength, and strengthen yours!
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No-Frills, Evidence-Based Mindfulness
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What’s on your mind, really?
We hear a lot about “the evidence-based benefits of mindfulness”, but what actually are they? And what is the evidence? And, perhaps most importantly: how do we do it?
What are the benefits?
The benefits of mindfulness are many, and include:
- reducing stress
- reducing pain
- improving quality of life
- reducing fatigue
- providing relief from digestive disorders
- reducing symptoms of sleep disorders
- improving immune response
- providing support for caregivers
The evidence is also abundant, and includes:
- Effects of mindfulness exercises as stand-alone intervention on symptoms of anxiety and depression: Systematic review and meta-analysis
- Fusing character strengths and mindfulness interventions: Benefits for satisfaction and performance
- Evidence for the Role of Mindfulness in Cancer: Benefits and Techniques
- Effects of mindfulness-based stress reduction on anxiety symptoms: A systematic review and meta-analysis
- The benefits of meditation and mindfulness practices during times of crisis such as COVID-19
Sounds great… What actually is it, though?
Mindfulness is the state of being attentive to one’s mind. This is at its heart a meditative practice, but that doesn’t necessarily mean you have to be sitting in the lotus position with candles—mindfulness can be built into any daily activity, or even no activity at all.
An exercise you can try right now:
Take a moment to notice everything you can hear. For this writer, that includes:
- The noise of my keystrokes as I type
- The ticking of the clock on the wall
- The gentle humming of my computer’s processor
- The higher-pitched noise of my computer’s monitor
- Birdsong outside
- Traffic further away
- My own breathing
- The sound of my eyelids as I blink
Whatever it is for you, notice how much you can notice that you had previously taken for granted.
You can repeat this exercise with other senses, by the way! For example:
- Notice five things you can see in your immediate environment that you’ve never noticed before. If you’re at home reading this, you probably think you’re very familiar with everything around you, but now see that mark on the wall you’d never noticed before, or a quirk of some electrical wiring, or the stitching on some furnishing, for example.
- Notice the textures of your clothes, or your face, or perhaps an object you’ve never paid attention to touching before. Your fingertips, unless you have some special reason this doesn’t apply to you, are far more sensitive than you probably give them credit for, and can notice the tiniest differentiation in textures, so take a moment to do that now.
- Mindful eating can be an especially healthful practice because it requires that we pay every attention to what we’re putting in our mouth, tasting, chewing, swallowing. No more thoughtlessly downing a box of cookies; every bite is now an experience. On the one hand, you’ll probably eat less at a sitting. On the other hand, what a sensory experience! It really reminds one that life is for living, not just for zipping through at a speed-run pace!
What about mindfulness as a meditative practice?
Well, those are meditative practices! But yes, mindfulness goes for more formal meditation too. For example:
Sit comfortably, with good posture, whatever that means to you. No need to get too caught up in the physical mechanics here—it’d take a whole article. For now, if you’re sitting and comfortable, that’s enough.
Notice your breathing. No need to try to control it—that’s not what this is about today. Just notice it. The in, the out, whether you breathe to your chest or abdomen, through your nose or mouth, don’t worry about doing it “right”, just notice what you are doing. Observe without judgement.
Notice your thoughts—no need to try to stop them. Notice noticing your thoughts, and again, observe without judgement. Notice your feelings; are you angry, hopeful, stressed, serene? There are no wrong answers here, and there’s nothing you should try to “correct”. Just observe. No judgement, only observe. Watch your thoughts, and watch your thoughts go.
Did you forget about your breathing while watching your thoughts? Don’t worry about that either if so, just notice that it happened. If you have any feelings about that, notice them too, and carry on observing.
We go through so much of our lives in “autopilot”, that it can be an amazing experience to sometimes just “be”—and be aware of being.
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Less Common Oral Hygiene Options
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Less Common Alternatives For Oral Hygiene!
You almost certainly brush your teeth. You might use mouthwash. A lot of people floss for three weeks at a time, often in January.
There are a lot of options for oral hygiene; variations of the above, and many alternatives too. This is a big topic, so rather than try to squeeze it all in one, this will be a several-part series.
- The first part was: Toothpastes & Mouthwashes: Which Help And Which Harm?
- The second part was: Flossing, Better (And Easier!)
- The third (and for now at least, final) part will look at some less common alternatives.
Tooth soap
The idea here is simplicity, and brushing with as few ingredients as possible. Soap cleans your teeth the same way it cleans your (sometimes compositionally quite similar—enamel and all) dishes, without damaging them.
We’d love to link to some science here, but alas, it appears to have not yet been done—at least, we couldn’t find any!
You can make your own tooth soap if you are feeling confident, or you might prefer to buy one ready-made (here’s an example product on Amazon, with various flavor options)
Oil pulling
We are getting gradually more scientific now; there is science for this one… But the (scientific) reviews are mixed:
Wooley et al., 2020, conducted a review of extant studies, and concluded:
❝The limited evidence suggests that oil pulling with coconut oil may have a beneficial effect on improving oral health and dental hygiene❞
The “Science-Based Medicine” project was less positive in its assessment, and declared that all and any studies that found oil pulling to be effective were a matter of researcher/publication bias. We would note that SBM is a private project and is not without its own biases, but for balance, here is what they had to offer:
A more rounded view seems to be that it is a good method for cleaning your teeth if you don’t have better options available (whereby, “better options” is “almost any other method”).
One final consideration, which the above seemed not to consider, is:
If you have sensitive teeth/gums, oil-pulling is the gentlest way of cleaning them, and getting them back into sufficient order that you can comfortably use other methods.
Want to try it? You can use any food-grade oil (coconut oil or olive oil are common choices).
Chewing stick
Not just any stick—a twig of the Salvadora persica tree. This time, there’s lots of science for it, and it’s uncontroversially effective:
❝A number of scientific studies have demonstrated that the miswak (Salvadora persica) possesses antibacterial, anti-fungal, anti-viral, anti-cariogenic, and anti-plaque properties.
Several studies have also claimed that miswak has anti-oxidant, analgesic, and anti-inflammatory effects. The use of a miswak has an immediate effect on the composition of saliva.
Several clinical studies have confirmed that the mechanical and chemical cleansing efficacy of miswak chewing sticks are equal and at times greater than that of the toothbrush❞
Read in full: A review of the therapeutic effects of using miswak (Salvadora Persica) on oral health
And about the efficacy vs using a toothbrush, here’s an example:
Comparative effect of chewing sticks and toothbrushing on plaque removal and gingival health
Want to try the miswak stick? Here’s an example product on Amazon.
Enjoy!
Don’t Forget…
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