How Emotions Are Made – by Dr. Lisa Feldman Barrett
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We’ve previously reviewed Dr. Barrett’s (also good) book Seven And A Half Lessons About The Brain, and this one is very different, and of more practical use:
The main thrust of the book is: the bioessentialist model of emotions is flawed; there is also no Platonic perfect form of any given emotion, and in fact emotions are constructed by the brain as a learned adaptive response.
She argues this from the dual vectors of on the one hand hard sciences of affective neuroscience and clinical psychology, and on the other hand sociology and anthropology.
In the category of criticism: Dr. Barrett, a very well-known and well-respected cognitive neuroscientist, is not an expert on sociology and anthropology, and some of her claims there are verifiably false.
However, most of the book is given over the psychophysiology, which is entirely her thing, and she explains it clearly and simply while backing everything up with mountains of data.
The usefulness of this book is chiefly: if we understand that emotions are not innate and are instead constructed adaptive (and sometimes maladaptive) neurological responses to stimuli and associations, we can set about rewiring things a little in accord with what’s actually more beneficial to us. The book also outlines how.
Bottom line: if you’d like to be able to not merely manage emotions as they are, but also prune and/or grow them from the stem up, then this book provides a robustly scientific approach for doing that.
Click here to check out How Emotions Are Made, and get more discerning about yours!
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Make Your Saliva Better For Your Teeth
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A new study has highlighted the importance of lifestyle factors in shaping the oral microbiome—that is to say, how the things we do affect the bacteria that live in our mouths:
Nepali oral microbiomes reflect a gradient of lifestyles from traditional to industrialized
Neither the study title nor the abstract elucidate how, exactly, one impacts the other, but the study itself does (of course) contain that information; we read it, and the short version is:
In terms of the extremes of “most traditional” to “most industrialized”, foragers have the most diverse oral microbiomes (that’s good), and people with an American industrialized lifestyle had the least diverse oral microbiomes (that’s bad). Between the two extremes, we see the gradient promised by the title.
If you do feel like checking it out, Figure 3 in the paper illustrates this nicely.
Also illustrated in the above-linked Figure 3 is oral microbiome composition. In other words (and to oversimplify it rather), how good or bad our mouth bacteria are for us, independent of diversity (so for example, are there more of this or that kind of bacteria).
Once again, there is a gradient, only this time, the ends of it are even more polarized: foragers have a diverse oral microbiome rich with healthy-for-humans bacteria, while people with an American industrialized lifestyle might not have the diversity, but do have a large number of bad-for-humans bacteria.
While many lifestyle factors are dietary or quasi-dietary, e.g. what kinds of foods people eat, whether they drink alcohol, whether they smoke or use gum, etc, many lifestyle factors were examined, including everything from medications and exercise, to things like kitchen location and what fuel is predominantly used, to education and sexual activity and many other things that we don’t have room for here.
You can see how each lifestyle factor stacked up, in Figure 5.
Why it matters
Our oral microbiome affects many aspects of health, including:
- Locally: caries, periodontal diseases, mucosal diseases, oral cancer, and more
- Systemically: gastrointestinal diseases in general, IBS in particular, nervous system diseases, Alzheimer’s disease, endocrine diseases, all manner of immune/autoimmune diseases, and more
Nor are the effects it has mild; oral microbiome health can be a huge factor, statistically, for many of the above. You can see information and data pertaining to all of the above and more, here:
Oral microbiomes: more and more importance in oral cavity and whole body
What to do about it
Take care of your oral microbiome, to help it to take care of you. As well as the above-mentioned lifestyle factors, it’s worth noting that when it comes to oral hygiene, not all oral hygiene products are created equal:
Toothpastes & Mouthwashes: Which Kinds Help, And Which Kinds Harm?
Additionally, you might want to consider gentler options, but if you do, take care to opt for things that science actually backs., rather than things that merely trended on social media.
This writer (hi, it’s me) is particularly excited about the science and use of the miswak stick, which comes from the Saladora persica tree, and has phytochemical properties that (amongst many other health-giving effects) improve the quality of saliva (i.e., improve its pH and microbiome composition). In essence, your own saliva gets biochemically nudged into being the safest, most effective mouthwash.
There’s a lot of science for the use of S. persica, and we’ve discussed it before in more detail than we have room to rehash today, here:
Less Common Oral Hygiene Options
If you’d like to enjoy these benefits (and also have the equivalent of a toothbrush that you can carry with you at all times and does not require water*), then here’s an example product on Amazon 😎
*don’t worry, it won’t feel like dry-brushing your teeth. Remember what we said about what it does to your saliva. Basically, you chomp it once, and your saliva a) increases and b) becomes biological tooth-cleaning fluid. The stick itself is fibrous, so the end of it frays in a way that makes a natural little brush. Each stick is about 5”×¼” and you can carry it in a little carrying case (you’ll get a couple with each pack of miswak sticks), so you can easily use it in, say, the restroom of a restaurant or before your appointment somewhere, just as easily as you could use a toothpick, but with much better results. You may be wondering how long a stick lasts; well, that depends on how much you use it, but in this writer’s experience, each stick lasts about a month maybe, using it at least 2–3 times per day, probably rather more since I use it after each meal/snack and upon awakening.
(the above may read like an ad, but we promise you it’s not sponsored and this writer’s just enthusiastic, and when you read the science, you will be too)
Enjoy!
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Future-Proof Your Brain
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This is Kimberly Wilson. She’s a psychologist, not a doctor, and/but her speciality is neurophysiology and brain health.
Here’s what she wants us to know…
Avoid this very common killer
As you’re probably aware, the #1 killer in the US is heart disease, followed by COVID, which effectively pushed everything down a place. Thereafter, we see cancer, followed by accidental injuries, stroke, and dementia (including Alzheimer’s).
Over in the UK, where Wilson is from, dementia (including Alzheimer’s disease) is the #1 killer, followed by heart disease and then respiratory diseases (including COVID), and then stroke, then cancer.
As ever, what’s good for the heart is good for the brain, so many of the same interventions will help avoid both. With regard to some of the other differences in order, the reasons are mostly due to differences in the two countries’ healthcare systems and firearms laws.
It’s worth noting, though, that the leading cause of death in young people (aged 15–19) is suicide in the UK; in the US it’s nominally accidental injuries first (e.g. accidental shootings) with intentional suicide in the second spot.
In other words… Young or old, mental health is a serious health category that kills literally the most people in the UK, and also makes the top spots in the US.
Avoid the early killer
Given the demographics of most of our readership, chances are you’ve already lived past your teens and twenties. That’s not to say that suicide is no longer a risk, though, and it’s also worth noting that while mental health issues are invisible, they’re still physical illnesses (the brain is also an organ, after all!), so this isn’t something where you can simply “decide not to” and that’s you set, safe for life. So, please do continue to take good care in that regard.
We wrote about this previously, here:
How To Stay Alive (When You Really Don’t Want To)
Avoid the later killer
Wilson talks about how a recent survey found that…
- while nearly half of adults say dementia is the disease they fear most,
- only a third of those thought you could do anything to avoid it, and
- just 1% could name the 7 known risk factors.
Quick test: can you name the 7 known risk factors?
Please take a moment to actually try (this kind of mental stimulation is good in any case), and count them out on your fingers (or write them down), and then…
When you’re ready: click here to see the answer!
How many did you get? If you got them all, well done. If not, then well, now you know, so that’s good.
So, with those 7 things in mind, the first obvious advice is to take care of those things.
Taking an evidence-based medicine approach, Wilson recommends some specific interventions that will each improve one or more of those things, directly or indirectly:
Eating right
Wilson is a big fan of “nutritional psychiatry” and feeding one’s brain properly. We wrote about this, here:
The 6 Pillars Of Nutritional Psychiatry
As well as agreeing with the obvious “eat plenty of fiber, different-colored plants, and plenty of greens and beans”, Wilson specifically also champions getting enough of vitamins B9, B12, and D, as well as getting a healthy dose of omega-3 fatty acids.
She also recommends intermittent fasting, if that’s a reasonable option for you—but advocates for not worrying about it, if it’s not easy for you. For example, if you are diabetic, or have (or have a history with) some kind of eating disorder(s), then it’s probably not usefully practicable. But for most people, it can reduce systemic inflammation, which means also reducing neuroinflammation.
Managing stress right
Here she advocates for three main things:
- Mindful meditation (see: Evidence-Based, No-Frills Mindfulness)
- Psychological resilience (see: Building Psychological Resilience)
- Mindful social media use (see: Making Social Media Work For Your Mental Health)
Managing money right
Not often we talk about this in a health science publication as opposed to a financial planning publication, but the fact is that a lot of mental distress, which goes on to have a huge impact on the brain, is rooted in financial stresses.
And, of course, it’s good to be able to draw on financial resources to directly fund one’s good health, but that is the secondary consideration here—the financial stress is the biggest issue, and you can’t CBT your way out of debt, for example.
Therapists often face this, and what has been referred to informally by professionals in the field as “Shit Life Syndrome”—and there’s only so much that therapy can do about that.
We’re not a financial publication, but one recommendation we’ll drop is that if you don’t currently have budgeting software that you use, this writer personally uses and swears by YNAB (You Need A Budget), so maybe check that out if you don’t already have everything covered in that regard. It’s not free, but there is a 34-day free trial.
Therapy can be very worthwhile nonetheless
Wilson notes that therapy is like non-invasive brain surgery (because of neuroplasticity, it’s literally changing physical things in your brain).
It’s not a magic bullet and it’s not the right choice for everyone, but it’s worth considering, and even self-therapy can yield benefits for many:
The Gym For Your Mental Health: Getting The Most Out Of Therapy
Sleeping right
Sleep is not only critical for health in general and brain health in particular, it’s also most of when our glymphatic system does clean-up in the brain (essential for avoiding Alzheimer’s & Parkinson’s, amongst other diseases):
How To Clean Your Brain (Glymphatic Health Primer)
Want to know more from Kimberley Wilson?
We reviewed a book of hers recently, here:
Unprocessed: What your Diet Is Doing To Your Brain – by Kimberley Wilson
However, much of what we shared today was sourced from another book of hers that we haven’t reviewed yet but probably will do one of these days:
Enjoy!
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The Fascinating Truth About Aspartame, Cancer, & Neurotoxicity
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Is Aspartame’s Reputation Well-Deserved?
In Tuesday’s newsletter, we asked you for your health-related opinions on aspartame, and got the above-depicted, below-described, set of responses:
- About 47% said “It is an evil carcinogenic neurotoxin”
- 20% said “It is safe-ish, but has health risks that are worse than sugar”
- About 19% said “It is not healthy, but better than sugar”
- About 15% said “It’s a perfectly healthy replacement for sugar”
But what does the science say?
Aspartame is carcinogenic: True or False?
False, assuming consuming it in moderation. In excess, almost anything can cause cancer (oxygen is a fine example). But for all meaningful purposes, aspartame does not appear to be carcinogenic. For example,
❝The results of these studies showed no evidence that these sweeteners cause cancer or other harms in people.❞
~ NIH | National Cancer Institute
Source: Artificial Sweeteners and Cancer
Plenty of studies and reviews have also confirmed this; here are some examples:
- Evaluation of aspartame cancer epidemiology studies based on quality appraisal criteria
- Aspartame, low-calorie sweeteners and disease: Regulatory safety and epidemiological issues
- Aspartame: A review of genotoxicity data
Why then do so many people believe it causes cancer, despite all the evidence against it?
Well, there was a small study involving giving megadoses to rats, which did increase their cancer risk. So of course, the popular press took that and ran with it.
But those results have not been achieved outside of rats, and human studies great and small have all been overwhelmingly conclusive that moderate consumption of aspartame has no effect on cancer risk.
Aspartame is a neurotoxin: True or False?
False, again assuming moderate consumption. If you’re a rat being injected with a megadose, your experience may vary. But a human enjoying a diet soda, the aspartame isn’t the part that’s doing you harm, so far as we know.
For example, the European Food Safety Agency’s scientific review panel concluded:
❝there is still no substantive evidence that aspartame can induce such effects❞
~ Dr. Atkin et al (it was a pan-European team of 21 experts in the field)
Source: Report on the Meeting on Aspartame with National Experts
See also,
❝The data from the extensive investigations into the possibility of neurotoxic effects of aspartame, in general, do not support the hypothesis that aspartame in the human diet will affect nervous system function, learning or behavior.
The weight of existing evidence is that aspartame is safe at current levels of consumption as a nonnutritive sweetener.❞
and
❝The safety testing of aspartame has gone well beyond that required to evaluate the safety of a food additive.
When all the research on aspartame, including evaluations in both the premarketing and postmarketing periods, is examined as a whole, it is clear that aspartame is safe, and there are no unresolved questions regarding its safety under conditions of intended use.❞
Source: Regulatory Toxicology & Pharmacology | Aspartame: Review of Safety
Why then do many people believe it is a neurotoxin? This one can be traced back to a chain letter hoax from about 26 years ago; you can read it here, but please be aware it is an entirely debunked hoax:
Urban Legends | Aspartame Hoax
Take care!
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Deskbound – by Kelly Starrett and Glen Cordoza
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We’ve all heard that “sitting is the new smoking”, and whether or not that’s an exaggeration (the jury’s out), one thing that is clear is that sitting is very bad.
Popular advice is “here’s how to sit with good posture and stretch your neck sometimes”… but that advice tends to come from companies that pay people to sit for a long time. They might not be the a very unbiased source.
Starrett and Cordoza offer better. After one opening chapter covering the multifarious ways sitting ruins our health, the rest of the book is all advice, covering:
- The principles of how the body is supposed to be
- The most important movements that we should be doing
- A dynamic workstation setup
- This is great, because “get a standing desk” tends to present more questions than answers, and can cause as much harm as good if done wrong
- The authors also cover how to progressively cut down on sitting, rather than try to go cold-turkey.
- They also recognize that not everyone can stand at all, and…
- Optimizing the sitting position, for when we must sit
- Exercises to maintain our general mobility and compensate about as well as we can for the body-unfriendly nature of modern life.
The book is mostly explanations, so at 682 pages, you can imagine it’s not just “get up, lazybones!”. Rather, things are explained in such detail (and with many high-quality medical diagrams) so that we can truly understand them.
Most of us have gone through life knowing we should have “better posture” and “move more”… but without the details, that can be hard to execute correctly, and worse, we can even sabotage our bodies unknowingly with incorrect form.
This book straightens all that out very comprehensively, and we highly recommend it.
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10 Great Exercises to Improve Your Eyesight
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If your eyesight has been declining a bit, all is not lost. Just like many other muscles in the body, the muscles of the eye—including those responsible for changing the focal length of your vision—can atrophy without exercise. So, without further ado, here are the exercises recommended:
The eyes (still) have it
- Blink for a minute: blink rapidly for 30–60 seconds to regulate blood circulation, lubricate your eyes, and prevent dryness.
- Rotate your head while staring ahead: turn your head in a circular motion while keeping your gaze straight ahead. This improves blood circulation to your eyes.
- Look to your right and left: slowly move your gaze from right to left while breathing. This one relaxes and stretches the eye muscles.
- Close your eyes and relax: close your eyes for at least 30 seconds to relax and strengthen your photoreceptor cells.
- Move your gaze in different directions: shift your gaze right-left, up-down, in circular motions, and trace a figure 8 with your eyes. This improves visual perception for both near- and far-sightedness.
- Close and open your eyes: tighten your eyes shut for 3–5 seconds, then open them. Repeat seven times to improve blood circulation and relax your eye muscles. ← 10almonds note: the duration makes this different from #4, so do try both!
- Push against your temples with your fingers: gently press your temples with your fingers for two seconds, then release. Repeat 4–5 times to improve fluid circulation in your eyes.
- Draw geometric figures with your gaze: use your eyes to trace shapes such as triangles, squares, and circles to enhance your eye coordination and muscle strength.
- Move your eyeballs up and down: close your eyes and slowly move your eyeballs up and down five times to stretch and relax the muscles ← 10almonds note: this seems to be the same as part of #5 and has a considerable overlap with #8, but we’re listing it anyway, or else everyone will wonder where #9 went!
- Strengthen near and far focusing: focus on your thumb 10 inches away for 10–15 seconds, then switch focus to an object 10–20 feet away. Repeat five times to improve focus adjustment ability.
By practicing these exercises daily, we are told that you can improve eye health and vision within a week.
For more on all these, plus visual demonstrations, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
Vision for Life, Revised Edition – by Dr. Meir Schneider
Take care!
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Gut-Healthy Tacos
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Full of prebiotics and probiotics, healthy fats, colorful salad boasting vitamins and minerals aplenty, and of course satisfying protein too, these tacos are also boasting generous flavors to keep you coming back for more…
You will need
- 24 sardines—canned is fine (if vegetarian/vegan, substitute tempeh and season generously; marinade if you have time)
- 12 small wholewheat tortillas
- 1 14oz/400g can black beans, drained
- 1 ripe avocado, stoned and cut into small chunks
- 1 red onion, thinly sliced
- 1 little gem lettuce, shredded
- 12 cherry tomatoes, halved
- 1 bulb garlic, crushed
- 1 lemon, sliced
- 4 tbsp plain unsweetened yogurt (your choice what kind, but something with a live culture is best)
- 3oz pickled jalapeños, roughly chopped
- 1oz cilantro (or substitute parsley if you have the cilantro-tastes-like-soap gene), finely chopped
- 1 tbsp extra virgin olive oil
- 2 tsp black pepper
- 1 tsp smoked paprika
- Juice of 1 lime
- Optional: Tabasco sauce, or similar hot sauce
Method
(we suggest you read everything at least once before doing anything)
1) Preheat your oven to a low temperature; 200℉ or just under 100℃ is fine
2) Place the lemon slices on top of the sardines on top of foil on a baking tray; you want the foil to be twice as much as you’d expect to need, because now you’re going to fold it over and make a sort of sealed envelope. You could use a dish with a lid yes, but this way is better because there’s going to be less air inside. Upturn the edges of the envelope slightly so that juices won’t run out, and make sure the foil is imperfectly sealed so a little steam can escape but not much at a time. This will ensure it doesn’t dry out, while also ensuring your house doesn’t smell of fish. Put all this into the oven on a middle shelf.
3) Mix the lime juice with the onion in a bowl, and add the avocado and tomatoes, mixing gently. Add half the cilantro, and set aside.
4) Put the black beans in a sieve and pour boiling water over them to refresh and slightly warm them. Tip them into a bowl and add the olive oil, black pepper, and paprika. Mix thoroughly with a fork, and no need to be gentle this time; in fact, deliberately break the beans a little in this case.
5) Mix the yogurt, jalapeños, garlic, and remaining cilantro in a small bowl.
6) Get the warmed sardines from the oven; discard the lemon slices.
7) Assemble! We recommend the order: tortilla, lettuce, fish (2 per taco), black bean mixture, salad mixture, garlic jalapeño yogurt mixture. You can also add a splash of the hot sauce per your preference, or if catering for more people, let people add their own.
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- We Are Such Stuff As Fish Are Made Of
- Level-Up Your Fiber Intake! (Without Difficulty Or Discomfort)
- Making Friends With Your Gut (You Can Thank Us Later)
- Our Top 5 Spices: How Much Is Enough For Benefits?
- Enjoy Pungent Polyphenols For Your Heart & Brain
Take care!
Don’t Forget…
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