The Telomere Effect – by Dr. Elizabeth Blackburn and Dr. Elissa Epel
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Telomeres can be pretty mystifying to the person with a lay interest in longevity. Beyond “they’re the little caps that sit on the end of your DNA, and longer is better, and when they get short, damage occurs, and aging”, how do they fit into the big picture?
Dr. Elizabeth Blackburn and Dr. Elissa Epel excel at explaining the marvelous world of telomeres…
- how they work
- what affects them
- and how and why
…and the extent to which changes are or aren’t reversible.
For some of us, the ship has sailed on avoiding a lot of early-life damage to our telomeres, and now we have a damage-mitigation task ahead. That’s where the authors get practical.
Indeed, the whole third part of the book is titled “Help Your Body Protect Its Cells“, and indeed covers not just “from now on” protection, but undoing some of the damage already done (yes, telomeres can be lengthened—it gets harder as we get older, but absolutely can be done).
In short: if you’d like to avoid further damage to your telomeres where possible, and reverse some of the damage done already, this book will set you on the right track.
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GABA Against Stress/Anxiety
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A Neurotransmitter Less Talked-About
GABA is taken by many people as a supplement, mostly as a mood modifier, though its health claims go beyond the recreational—and also, we’re of the opinion that mental health is also just health, and if it works, it works. We’ll explore some of the claims and science behind them today…
What is GABA?
GABA stands for gamma-aminobutyric acid, and it’s a neurotransmitter. It’s a lot less talked-about than for example dopamine or serotonin, but it’s very important nonetheless.
We make it ourselves inside our body, and we can also get it from our food, or supplement it, and some drugs will also have an effect on its presence and/or activity in our body.
What foods is it found in?
- Animals, obviously (just like in human brains*)
- Fermented foods (many kinds)
- Yeast
- Tea
- Tomatoes
- Mulberries
For more details, see:
γ-Aminobutyric acid found in fermented foods and beverages: current trends
*However, we do not recommend eating human brains, due to the risk of CJD and prion diseases in general.
What claims are made about it and are they true?
For brevity, we’ll give a little spoiler up-front: all the popular claims for it appear to be valid, though there’s definitely room for a lot more human trials (we skipped over a lot of rodent studies today!).
So we’ll just drop some of its main benefits, and human studies to back those.
Reduction of stress and anxiety
GABA decreases task-related stress and anxiety within 30 minutes of being taken, both in subjective measures (i.e., self-reports) and in objective clinical physiological measures:
Cognitive enhancement
It’s not a does-everything nootropic like some, but it does have clear benefits to episodic memory:
❝GABA intake might help to distribute limited attentional resources more efficiently, and can specifically improve the identification and ordering of visual events that occur in close temporal succession❞
One of the things that makes this one important is that it also deals with the often-asked question of “does GABA pass the blood-brain barrier”:
❝The present findings do give further credence to the idea that oral ingestion does allow GABA to reach the brain and exert direct effects on cognition, which in the present case were specific to temporal attention.❞
Read more:
Supplementation of gamma-aminobutyric acid (GABA) affects temporal, but not spatial visual attention
Potential for more
We take care to give good quality sources, so the following study comes with a big caveat that it has since been retracted. Why was it retracted, you wonder?
It’s about the sample; they cite “30 healthy adults”, but neglected tp mention that this figure was initially 46. What happened to the other 16 participants is unclear, but given that this was challenged and the challenge not answered, it was sufficient for the journal (Nature) to pull the study, in case of deliberate sample bias.
However! Running the numbers in their results section, a probability of 0.03 is very compelling unless the disappearance of 16 subjects was outright fraudulent (which we regrettably cannot know either way).
Here’s the study (so take it with a pinch of salt, considering the above), and taken at face value, it shows how GABA supplementation improves accurate reactions to fast-moving visual and auditory stimuli:
RETRACTED ARTICLE: γ-Aminobutyric acid (GABA) administration improves action selection processes: a randomised controlled trial
…so, hopefully this experiment will be repeated, without disappearing participants!
The sweet spot
You may be wondering how something that slows a person down (having a relaxing effect) can also speed a person up. This has to do with what it is and isn’t affecting; think of it like a “focus mode” on your computer or other device that greys-out everything else a bit so that you can focus on what you’re doing.
It’s in some ways (by different neurochemical pathways, though) a similar effect to the “relaxed alertness” created by l-theanine supplementation.
There’s also a sweet spot whereby GABA is toning some things down just the right amount, without adversely affecting performance in areas we don’t want slowed down. For the science of this, see:
Is it safe?
GABA is “Generally Recognized As Safe”. However:
- you should speak with your pharmacist if you are taking any medications for blood pressure or epilepsy, as GABA supplementation may cause them to work too well.
- you should absolutely not take GABA with alcohol or opioids as (dose-dependent for all the substances involved, and also depending on your metabolic base rate and other factors) its acute depression of the CNS can mean you relax and slow down too much, and you may find yourself not breathing often enough to sustain life.
Aside from that, it is considered safe up to at least 1g/kg/day*. Given that popular doses are 120–750mg, and most people weigh more than 750g, this is very safe for most people:
United States Pharmacopeia (USP) Safety Review of Gamma-Aminobutyric Acid (GABA)
Where can I get it?
We don’t sell it, but for your convenience, here’s an example product on Amazon
Enjoy!
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Never Enough – by Dr. Judith Grisel
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We’ve reviewed books about addiction before—specifically about alcohol, at least. This one’s more general in that it covers different addictions.
On the other hand, it’s also more specific, in that it covers them from the author’s field: neuroscience.
…and experience too. The author had a plethora of addictions (the serious kind), got sober, and then undertook to study neuroscience. Her hope was to help others avoid, or escape from the same as‚ what she went through.
Dr. Grisel (as she now is) takes a methodical approach in this book. She works her way through the addictive mechanisms of a broad selection of common drugs, explaining each.
The focus here is on neutral explanations, rather than the propagandizing scaremongering that failed at least one generation. Why each drug is alluring, what it really does do—and the neurological price it exacts, down to the molecular level.
She also covers risk factors for addiction; genetic, epigenetic, and environmental. There’s no “if you were stronger”, or “these people made bad choices”, so much as… Many addicts were, in effect, sabotaged from before birth.
That doesn’t mean that to become addicted or not is just fate, but it does mean… There but for the grace of factors completely outside of our control go we.
Why is this useful to us, be we a reader without any meaningful addiction (we’re not counting coffee etc here)? Well, as this book illustrates and explains, many of us could be one (more) mishap away from a crippling addiction and not know it. Forewarned is forearmed.
Bottom line: almost all of us are, have been, or will be touched by addiction in some way. Either directly, or a loved one, or a loved one’s loved one, or perhaps a parent who gave us an epigenetic misfortune. This book gives understanding that can help.
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Apple vs Apricot – Which is Healthier?
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Our Verdict
When comparing apple to apricot, we picked the apricot.
Why?
In terms of macros, there’s not too much between them; apples are higher in carbs and only a little higher in fiber, which disparity makes for a slightly higher glycemic index, but it’s not a big difference and they are both low GI foods.
Micronutrients, however, set these two fruits apart:
In the category of vitamins, apple is a tiny bit higher in choline, while apricots are higher in vitamins A, B1, B2, B3, B5, B6, B9, C, E, and K—in most cases, by quite large margins, too. All in all, a clear and easy win for apricots.
When it comes to minerals, apples are not higher in any minerals, while apricots are higher in calcium, copper, iron, magnesium, manganese, phosphorus, potassium, selenium, and zinc. There’s simply no contest here.
In short, if an apple a day keeps the doctor away, then an apricot will give the doctor a nice weekend break somewhere.
Want to learn more?
You might like to read:
Top 8 Fruits That Prevent & Kill Cancer
Take care!
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The Mind-Gut Connection – by Dr. Emeran Mayer
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We’ve reviewed books about the mind-gut connection before, so what makes this one stand out?
Firstly, it’s a lot more comprehensive than the usual “please, we’re begging you, eat some fiber”.
And yes, of course that’s part of it. Prebiotics, probiotics, reduce fried and processed foods, reduce sugar/alcohol, reduce meat, and again, eat some greenery.
But where this book really comes into its own is looking more thoroughly at the gut microbiota and their function. Dr. Mayer goes well beyond “there are good and bad bacteria” and looks at the relationship each of them have with the body’s many hormones, and especially neurotransmitters like serotonin and dopamine.
He also looks at the two-way connection between brain and gut. Yes, our gut gives us “gut feelings”, but 10% of communication between the brain and gut is in the other direction; he explores what that means for us, too.
Finally, he does give a lot of practical advice, not just dietary but also behavioral, to make the most of our mind-gut connection and make it work for our health, rather than against it.
Bottom line: this is the best book on the brain-gut connection that this reviewer has read so far, and certainly the most useful if you already know about gut-healthy nutrition, and are looking to take your understanding to the next level.
Click here to check out The Mind-Gut Connection, and start making yours work for your benefit!
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6 Signs Of Stroke (One Month In Advance)
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Most people can recognise the signs of a stroke when it’s just happened, but knowing the signs that appear a month beforehand would be very useful. That’s what this video’s about!
The Warning Signs
- Persistently elevated blood pressure: one more reason to have an at-home testing kit and use it regularly! Or a smartwatch or similar that’ll do it for you. The reason this is relevant is because high blood pressure can lead to damaging blood vessels, causing a stroke.
- Excessive fatigue: of course, this one can have many possible causes, but one of them is a “transient ischemic attack” (TIA), which is essentially a micro-stroke, and can be a precursor to a more severe stroke. So, we’re not doing the Google MD thing here of saying “if this, then that”, but we are saying: paying attention to the overall patterns can be very useful. Rather than fretting unduly about a symptom in isolation, see how it fits into the big picture.
- Vision problems: especially if sudden-onset with no obvious alternative cause can be a sign of neural damage, and may indicate a stroke on the way.
- Speech problems: if there’s not an obvious alternative explanation (e.g. you’ve just finished your third martini, or was this the fourth?), then speech problems (e.g. slurred speech, trouble forming sentences, etc) are a very worrying indicator and should be treated as a medical emergency.
- Neurological problems: a bit of a catch-all category, but memory issues, loss of balance, nausea without an obvious alternative cause, are all things that should get checked out immediately just in case.
- Numbness or weakness in the extremities: especially if on one side of the body only, is often caused by the TIA we mentioned earlier. If it’s both sides, then peripheral neuropathy may be the culprit, but having a neurologist take a look at it is a good idea either way.
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Want to learn more?
You might also like to read:
Two Things You Can Do To Improve Stroke Survival Chances
Take care!
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Acorns vs Chestnuts – Which is Healthier?
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Our Verdict
When comparing acorns to chestnuts, we picked the acorns.
Why?
In terms of macros, chestnuts are mostly water, so it’s not surprising that acorns have a lot more carbs, fat, protein, and fiber. Thus, unless you have personal reasons for any of those to be a problem, acorns are the better choice, offering a lot more nutritional value.
In the category of vitamins, acorns lead with a lot more of vitamins A, B2, B3, B5, B6, and B9, while chestnuts have more of vitamins B1 and C. However, that vitamin C is useless to us, because it is destroyed in the cooking process (by boiling or roasting), and both of these nuts can be harmful if consumed raw, so that cooking does need to be done. That leaves acorns with a 6:1 lead.
When it comes to minerals, things are more even; acorns have more copper, magnesium, manganese, and zinc, while chestnuts have more calcium, iron, phosphorus, and potassium. Thus, a 4:4 tie (and yes, the margins of difference are approximately equal too).
We mentioned “both of these nuts can be harmful if consumed raw”, so a note on that: it’s because, while both contain an assortment of beneficial phytochemicals, they also both contain tannins that, if consumed raw, chelate with iron, essentially taking it out of our diet and potentially creating an iron deficiency. Cooking tannins stops this from being an issue, and the same cooking process renders the tannins actively beneficial to the health, for their antioxidant powers.
You may have heard that acorns are poisonous; that’s not strictly speaking true, except insofar as anything could be deemed poisonous in excess (including such things as water, and oxygen). Rather, it’s simply the above-described matter of the uncooked tannins and iron chelation. Even then, you’re unlikely to suffer ill effects unless you consume them raw in a fair quantity. While acorns have fallen from popular favor sufficient that one doesn’t see them in supermarkets, the fact is they’ve been enjoyed as an important traditional part of the diet by various indigenous peoples of N. America for centuries*, and provided they are cooked first, they are a good healthy food for most people.
*(going so far as to cultivate natural oak savannah areas, by burning out young oaks to leave the old ones to flourish without competition, to maximize acorn production, and then store dried acorns in bulk sufficient to cover the next year or so in case of a bad harvest later—so these was not just an incidental food, but very important “our life may depend on this” food. Much like grain in many places—and yes, acorns can be ground into flour and used to make bread etc too)
Do note: they are both still tree nuts though, so if you have a tree nut allergy, these ones aren’t for you.
Otherwise, enjoy both; just cook them first!
Want to learn more?
You might like to read:
Why You Should Diversify Your Nuts
Take care!
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