Caffeine: Cognitive Enhancer Or Brain-Wrecker?
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The Two Sides Of Caffeine
We asked you for your health-related opinions on caffeine itself, not necessarily the coffee, tea, energy drinks, etc that might contain it.
We have, by the way previously written about the health effects of coffee and tea specifically:
As for our question about caffeine itself, though, we got the above-depicted, below-described, set of results:
- About 59% said “caffeine is a safe stimulant and cognitive enhancer”
- About 31% said “caffeine is a moderately safe recreational drug”
- About 8% said “caffeine’s addictive properties make it de facto bad”
- One (1) person said “caffeine will leave you a trembling exhausted wreck”
But what does the science say?
Caffeine is addictive: True or False?
True, though one will find occasional academics quibbling the definition. Most of the studies into the mechanisms of caffeine addiction have been conducted on rats, but human studies exist too and caffeine is generally considered addictive for humans, for example:
See also:
Notwithstanding its addictive status, caffeine is otherwise safe: True or False?
True-ish, for most people. Some people with heart conditions or a hypersensitivity to caffeine may find it is not safe for them at all, and for the rest of us, the dose makes the poison. For example:
âťťCan too much caffeine kill you? Although quite rare, caffeine can be fatal in cases of overdose; such circumstances are generally not applicable to healthy individuals who typically consume caffeine via beverages such as tea or coffee.âťž
this paper, by the way, also includes a good example of academics quibbling the definition of addiction!
Caffeine is a cognitive enhancer: True or False?
True, but only in the case of occasional use. If you are using it all the time, your physiology will normalize it and you will require caffeine in order to function at your normal level. To attain higher than that, once addicted to caffeine, would now require something else.
Read more: Caffeine: benefits and drawbacks for technical performance
Caffeine will leave you a trembling exhausted wreck: True or False?
True or False depending on usage:
- The famously moderate 3–5 cups per day will not, for most people, cause any such problems.
- Using/abusing it to make up for lost sleep (or some other source of fatigue, such as physical exhaustion from exertion), however, is much more likely to run into problems.
In the latter case, caffeine really is the “payday loan” of energy! It’ll give you an adrenal boost now (in return, you must suffer the adrenal dumping later, along with lost energy expended in the adrenaline surge), and also, the tiredness that you thought was gone, was just caffeine’s adenosine-blocking activities temporarily preventing you from being able to perceive the tiredness. So you’ll have to pay that back later, with interest, because of the extra time/exertion too.
Want to make caffeine a little more gentle on your system?
Taking l-theanine alongside caffeine can ameliorate some of caffeine’s less wonderful effects—and as a bonus, l-theanine has some nifty benefits of its own, too:
Enjoy!
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The Alzheimer’s Gene That Varies By Race & Sex
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The Alzheimer’s Gene That Varies By Race & Sex
You probably know that there are important genetic factors that increase or decrease Alzheimer’s Risk. If you’d like a quick refresher before we carry on, here are two previous articles on this topic:
- Genetic Testing: Health Benefits & Methods (about personal genomics and health, including Alzheimer’s)
- The Surprising Link Between Type 2 Diabetes & Alzheimer’s (about the APOE-ε4 allele that is implicated in both)
A Tale of Two Alleles
It has generally been understood that APOE-ε2 lowers Alzheimer’s disease risk, and APOE-ε4 increases it.
However, for reasons beyond the scope of this article, research populations for genetic testing are overwhelmingly white. If you, dear reader, are white, you may be thinking “well, I’m white, so this isn’t a problem for me”, you might still want to read on…
An extensive new study, published days ago, by Dr. Belloy et al., looked at how these correlations held out per race and sex. They found:
- The “APOE-ε2 lowers; APOE-ε4 increases” dictum held out strongest for white people.
- In the case of Hispanic people, there was only a small correlation on the APOE-ε4 side of things, and none on the APOE-ε2 side of things per se.
- East Asians also saw no correlation with regard to APOE-ε2 per se.
- But! Hispanic and East Asian people had a reduced risk of Alzheimer’s if and only if they had both APOE-ε2 and APOE-ε4.
- Black people, meanwhile, saw a slight correlation with regard to the protective effect of APOE-ε2, and as for APOE-ε4, if they had any European ancestry, increased European ancestry meant a higher increased risk factor if they had APOE-ε4. African ancestry, on the other hand, had a protective effect, proportional to the overall amount of that ancestry.
And as for sex…
- Specifically for white people with the APOE-ε3/ε4 genotype, especially in the age range of 60–70, the genetic risk for Alzheimer’s was highest in women.
If you’d like to read more and examine the data for yourself:
APOE Genotype and Alzheimer Disease Risk Across Age, Sex, and Population Ancestry
Want to reduce your Alzheimer’s risk?
We have just the thing for you:
How To Reduce Your Alzheimer’s Risk: It’s Never Too Early To Do These 11 Things
Take care!
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Remember – by Dr. Lisa Genova
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Memory is often viewed as one thing—either you have a good memory, or you don’t. At best, a lot of people have a vague idea of selective memory. But, the reality is much more complex—and much more interesting.
Dr. Genova lays out clearly and simply the various different kinds of memory, how they work, and how they fail. Some of these kinds of memory operate on completely different principles than others, and/or in different parts of the brain. And, it’s not just “a memory for faces” or a “memory for names”, nor even “short term vs long term”. There’s working memory, explicit and implicit memory, semantic memory, episodic memory, muscle memory, and more.
However, this is not just an interesting book—it’s also a useful one. Dr. Genova also looks at how we can guard against failing memory in later years, and how we can expand and grow the kinds of memory that are most important to us.
The style of the book is very conversational, and not at all textbook-like. It’s certainly very accessible, and pleasant to read too.
Bottom line: memory is a weird and wonderful thing, and this book shines a clear light on many aspects of it—including how to improve the various different kinds of memory.
Click here to check out Remember (we recommend to do it now before you forget!
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Peanuts vs Hazelnuts – Which is Healthier?
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Our Verdict
When comparing peanuts to hazelnuts, we picked the hazelnuts.
Why?
It was close!
In terms of macros, peanuts have more protein while hazelnuts have more fiber and fat; the fat is healthy (mostly monounsaturated, some polyunsaturated, and very little saturated; less saturated fat than peanuts), so all in all, we’ll call this category a modest, subjective win for hazelnuts (since it depends on what we consider most important).
In the category of vitamins, peanuts have more of vitamins B2, B3, B5, B9, and choline, while hazelnuts have more of vitamins A, B1, B6, C, E, and K, making this one a marginal win for hazelnuts.
When it comes to minerals, peanuts have more magnesium, phosphorus, selenium, and zinc, while hazelnuts have more calcium, copper, iron, and manganese, so we’re calling it a tie on minerals.
Adding up the sections makes for a very close win for hazelnuts, but by all means enjoy both (unless you are allergic, of course)!
Want to learn more?
You might like to read:
Why You Should Diversify Your Nuts!
Enjoy!
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CBD Oil’s Many Benefits
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CBD Oil: What Does The Science Say?
First, a quick legal (and practical) note:
CBD and THC are both derived from the hemp or cannabis plant, but only the latter has euphoriant psychoactive effects, i.e., will get you high. We’re writing here about CBD derived from hemp and not containing THC (thus, will not get you high).
Laws and regulations differ far too much from place to place for us to try to advise here, so please check your own local laws and regulations. And also, while you’re at it, with your doctor and/or pharmacist.
As ever, this newsletter is for purposes of education and enjoyment, and does not constitute any kind of legal (or medical) advice.
With that in mind, onwards to today’s research review…
CBD for Pain Relief
CBD has been popularly touted as a pain relief panacea, and there are a lot of pop-science articles out there “debunking” this, but…
The science seems to back it up. We couldn’t find studies refuting the claim (of CBD as a viable pain relief option). We did, however, find research showing it was good against:
Note that that latter (itself a research review, not a single study, hence covering a lot of bases) describes it matter-of-factly, with no caveats or weasel-words, as:
“CBD, a non-euphoriant, anti-inflammatory analgesic with CB1 receptor antagonist and endocannabinoid modulating effects”
As a quick note: all of the above is about the topical use of CBD oil, not any kind of ingestion
CBD for Anxiety/Depression
There’s a well-cited study with what honestly we think was a bit of a small sample size, but compelling results within that:
A study published in the Brazilian Journal of Psychiatry tested the anxiety levels of 57 men in a simulated public speaking test.
Compared to placebo…
- Those who received 300mg of CBD experienced significantly reduced anxiety during the test.
- Those who received either 150mg or 600mg of CBD experienced more anxiety during the test than the 300mg group
- This means there’s a sweet spot to the dosage
There was also a clinical study that found CBD to have anti-depressant effects.
The methodology was a lot more robust, but the subjects were mice. We can’t have everything in one study, apparently! There is probably a paucity of human volunteers to have their brain slices looked at after tests, though.
Anyway, what makes this study interesting is that it measured quite an assortment of biological markers in the brain, and found that the CBD had a similar physiological effect to the antidepressant imipramine.
CBD for Treating Opioid Addiction
There are a lot of studies for this, both animal and human, but we’d like to put the spotlight on a human study (with the participation of heroin users) that found:
âťťWithin one week, CBD significantly reduced cravings, anxiety, resting heart rate, and salivary cortisol levels. No serious adverse effects were found.âťž
This is groundbreaking because the very thing about heroin is that it’s so addictive and the body rapidly needs more and more of it. You might think “duh”, but most people don’t realize this part:
Heroin is attractive because it offers (and delivers) an immediate guaranteed “downer”, instant relaxation… with none of the bad side effects of, for example, alcohol. No nausea, no hangover, nothing.
The problem is that the body gets tolerant to heroin very quickly, meaning your doses need to get bigger and more frequent to have the same effect.
Before you know it, what seemed like an affordable “self-medication for a stressful life” is very much out of control! Many doctors have personally found this out the hard way.
So, it’s ruinous:
- first to your financial health, as the costs rapidly spiral
- then to your physical health, as you either suffer from withdrawal or eventually overdose
Consequently, heroin is an incredibly easy drug to get hooked onto, and incredibly difficult to get back off.
So CBD offering relief is really a game-changer.
And more…
CBD has been well-studied and found to be effective for a lot of things, more than we could hope to cover in a single edition here.
Some further reading that may interest you includes:
- CBD against Diabetes in mice / in vitro / in humans
- CBD against neurological diseases (in general, in humans)
- CBD against arthritis in mice / in humans
- CBD specifically against the pain of rheumatoid arthritis / of osteoarthritis
Let us know if there’s any of these (or other) conditions you’d like us to look more into the CBD-related research for, because there’s a lot! You can always hit reply to any of our emails, or use the feedback widget at the bottom
Read (and shop, if you want and it’s permitted where you are):
10 Best CBD Oils of 2023, According to the Forbes Health Advisory Board
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Support For Long COVID & Chronic Fatigue
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Long COVID and Chronic Fatigue
Getting COVID-19 can be very physically draining, so it’s no surprise that getting Long COVID can (and usually does) result in chronic fatigue.
But, what does this mean and what can we do about it?
What makes Long COVID “long”
Long COVID is generally defined as COVID-19 whose symptoms last longer than 28 days, but in reality the symptoms not only tend to last for much longer than that, but also, they can be quite distinct.
Here’s a large (3,762 participants) study of Long COVID, which looked at 203 symptoms:
Characterizing long COVID in an international cohort: 7 months of symptoms and their impact
Three symptoms stood at out as most prevalent:
- Chronic fatigue (CFS)
- Cognitive dysfunction
- Post-exertional malaise (PEM)
The latter means “the symptoms get worse following physical or mental exertion”.
CFS, Chronic Fatigue Syndrome, is also called Myalgic Encephalomyelitis (ME).
What can be done about it?
The main “thing that people do about it” is to reduce their workload to what they can do, but this is not viable for everyone. Note that work doesn’t just mean “one’s profession”, but anything that requires physical or mental energy, including:
- Childcare
- Housework
- Errand-running
- Personal hygiene/maintenance
For many, this means having to get someone else to do the things—either with support of family and friends, or by hiring help. For many who don’t have those safety nets available, this means things simply not getting done.
That seems bleak; isn’t there anything more we can do?
Doctors’ recommendations are chiefly “wait it out and hope for the best”, which is not encouraging. Some people do recover from Long COVID; for others, it so far appears it might be lifelong. We just don’t know yet.
Doctors also recommend to journal, not for the usual mental health benefits, but because that is data collection. Patients who journal about their symptoms and then discuss those symptoms with their doctors, are contributing to the “big picture” of what Long COVID and its associated ME/CFS look like.
You may notice that that’s not so much saying what doctors can do for you, so much as what you can do for doctors (and in the big picture, eventually help them help people, which might include you).
So, is there any support for individuals with Long COVID ME/CFS?
Medically, no. Not that we could find.
However! Socially, there are grassroots support networks, that may be able to offer direct assistance, or at least point individuals to useful local resources.
Grassroots initiatives include Long COVID SOS and the Patient-Led Research Collaborative.
The patient-led organization Body Politic also used to have such a group, until it shut down due to lack of funding, but they do still have a good resource list:
Click here to check out the Body Politic resource list (it has eight more specific resources)
Stay strong!
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Pomegranate vs Figs – Which is Healthier?
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Our Verdict
When comparing pomegranate to figs, we picked the pomegranate.
Why?
In terms of macros, pomegranate has a lot more protein* and fiber, while the fig has more carbs. Thus, a win for pomegranate.
*Why such protein in a fruit? In both cases, it’s mostly from the seeds, which in both cases, we’re eating. However, pomegranates have a much greater seed-to-mass ratio than figs, and thus, a correspondingly higher amount of protein. Also some fats from the seeds, again more than figs, but the margin of difference is smaller, and not really enough to be of relevance.
In the category of vitamins, pomegranates lead with more of vitamins B1, B5, B9, C, E, K, and choline, while figs have more of vitamins A, B3, and B6. The largest margins of difference are in vitamins B9, E, and K, so all in pomegranate’s favor.
The minerals scene is closer to even; pomegranate has more copper, phosphorus, potassium, selenium, and zinc, while figs have more calcium, iron, magnesium, and manganese. Thus, a 5:4 lead for pomegranate, and the larger margins of difference are again for pomegranate.
In short, enjoy both, but pomegranates are the more nutritionally dense. Also, don’t throw away the peel! Dry it, and turn it into a powdered supplement—see our linked article below, for why:
Want to learn more?
You might like to read:
Pomegranate’s Health Gifts Are Mostly In Its Peel
Take care!
Don’t Forget…
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