Aging Is Inevitable… Or is it?
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Aging is inevitable… Or is it?
We’ve talked before about how and why aging happens. We’ve also talked about the work to tackle aging as basically an engineering problem, with the premise that our bodies are biological machines, and machines can be repaired. We also recommended a great book about this, by the way. But that’s about interfering with the biological process of aging. What about if the damage is already done?
“When the damage is done, it’s done”
We can do a lot to try to protect ourselves from aging, and we might be able to slow down the clock, but we can’t stop it, and we certainly can’t reverse it… right?
Wrong! Or at least, so we currently understand, in some respects. Supplementation with phosphatidylserine, for example, has shown promise for not just preventing, but treating, neurodegeneration (such as that caused by Alzheimer’s disease). It’s not a magic bullet and so far the science is at “probably” and “this shows great promise for…” and “this appears to…”
Phosphatidylserene does help slow neurodegeneration
…because of its role in allowing your cells to know whether they have permission to die.
This may seem a flippant way of putting it, but it’s basically how cell death works. Cells do need to die (if they don’t, that’s called cancer) and be replaced with new copies, and those copies need to be made before too much damage is accumulated (otherwise the damage is compounded with each new iteration). So an early cell death-and-replacement is generally better for your overall health than a later one.
However, neurons are tricky to replace, so phosphatidylserine effectively says “not you, hold on” to keep the rate of neuronal cell death nearer to the (slow) rate at which they can be replaced.
One more myth to bust…
For the longest time we thought that adults, especially older adults, couldn’t make new brain cells at all, that we grew a certain number, then had to hang onto them until we died… suffering diminished cognitive ability with age, on account of losing brain cells along the way.
It’s partly true: it’s definitely easier to kill brain cells than to grow them… Mind you, that’s technically true of people, too, yet the population continues to boom!
Anyway, new research showing that adults do, in fact, grow new braincells was briefly challenged by a 2018 study that declared: Human hippocampal neurogenesis drops sharply in children to undetectable levels in adults after all, never mind, go back to your business.
So was adult neurogenesis just a myth to be busted after all? Nope.
It turned out, the 2018 study had a methodological flaw!
To put it in lay terms: they had accidentally melted the evidence.
A 2019 study overcame this flaw by using a shorter fixation time for the cell samples they wanted to look at, and found that there were tens of thousands of “baby neurons” (again with the lay terms), newly-made brain cells, in samples from adults ranging from 43 to 87.
Now, there was still a difference: the samples from the youngest adult had 30% more newly-made braincells than the 87-year-old, but given that previous science thought brain cell generation stopped in childhood, the fact that an 87-year-old was generating new brain cells 30% less quickly than a 43-year-old is hardly much of a criticism!
As an aside: samples from patients with Alzheimer’s also had a 30% reduction in new braincell generation, compared to samples from patients of the same age without Alzheimer’s. But again… Even patients with Alzheimer’s were still growing some new brain cells.
Read it for yourself: Adult hippocampal neurogenesis is abundant in neurologically healthy subjects and drops sharply in patients with Alzheimer’s disease
In a nutshell…
- We can’t fully hit pause on aging just yet, but we can definitely genuinely slow it
- We can also, in some very specific ways, reverse it
- We can slow the loss of brain cells
- We can grow new brain cells
- We can reduce our risk of Alzheimer’s, and at least somewhat mitigate it if it appears
- We know that phosphatidylserine supplementation may help with most (if not all) of the above
- We don’t sell that (or anything else) but for your convenience, here it is on Amazon if you’re interested
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Adult Children of Emotionally Immature Parents – by Dr. Lindsay Gibson
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Not everyone had the best of parents, and the harm done can last well beyond childhood. This book looks at healing that.
Dr. Gibson talks about four main kinds of “difficult” parents, though of course they can overlap:
- The emotional parent, with their unpredictable outbursts
- The driven parent, with their projected perfectionism
- The passive parent, with their disinterest and unreliability
- The rejecting parent, with their unavailability and insults
For all of them, it’s common that nothing we could do was ever good enough, and that leaves a deep scar. To add to it, the unfavorable dynamic often persists in adult life, assuming everyone involved is still alive and in contact.
So, what to do about it? Dr. Gibson advocates for first getting a good understanding of what wasn’t right/normal/healthy, because it’s easy for a lot of us to normalize the only thing we’ve ever known. Then, beyond merely noting that no child deserved that lack of compassion, moving on to pick up the broken pieces one by one, and address each in turn.
The style of the book is anecdote-heavy (case studies, either anonymized or synthesized per common patterns) in a way that will probably be all-too-relatable to a lot of readers (assuming that if you buy this book, it’s for a reason), science-moderate (references peppered into the text; three pages of bibliography), and practicality-dense—that is to say, there are lots of clear usable examples, there are self-assessment questionnaires, there are worksheets for now making progress forward, and so forth.
Bottom line: if one or more of the parent types above strikes a chord with you, there’s a good chance you could benefit from this book.
Click here to check out Adult Children of Emotionally Immature Parents, and rebuild yourself!
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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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The Bitter Truth About Coffee (or is it?)
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The Bitter Truth About Coffee (or is it?)
Yesterday, we asked you for your (health-related) views on coffee. The results were clear: if we assume the responses to be representative, we’re a large group of coffee-enthusiasts!
One subscriber who voted for “Coffee is a healthy stimulant, hydrating, and full of antioxidants” wrote:
❝Not so sure about how hydrating it is! Like most food and drink, moderation is key. More than 2 or 3 cups make me buzz! Just too much.❞
And that fine point brings us to our first potential myth:
Coffee is dehydrating: True or False?
False. With caveats…
Coffee, in whatever form we drink it, is wet. This may not come as a startling revelation, but it’s an important starting point. It’s mostly water. Water itself is not dehydrating.
Caffeine, however, is a diuretic—meaning you will tend to pee more. It achieves its diuretic effect by increasing blood flow to your kidneys, which prompts them to release more water through urination.
See: Effect of caffeine on bladder function in patients with overactive bladder symptoms
How much caffeine is required to have a diuretic effect? About 4.5 mg/kg.
What this means in practical terms: if you weigh 70kg (a little over 150lbs), 4.5×70 gives us 315.
315mg is about how much caffeine might be in six shots of espresso. We say “might” because while dosage calculations are an exact science, the actual amount in your shot of espresso can vary depending on many factors, including:
- The kind of coffee bean
- How and when it was roasted
- How and when it was ground
- The water used to make the espresso
- The pressure and temperature of the water
…and that’s all without looking at the most obvious factor: “is the coffee decaffeinated?”
If it doesn’t contain caffeine, it’s not diuretic. Decaffeinated coffee does usually contain tiny amounts of caffeine still, but with nearer 3mg than 300mg, it’s orders of magnitude away from having a diuretic effect.
If it does contain caffeine, then the next question becomes: “and how much water?”
For example, an Americano (espresso, with hot water added to make it a long drink) will be more hydrating than a ristretto (espresso, stopped halfway through pushing, meaning it is shorter and stronger than a normal espresso).
A subscriber who voted for “Coffee messes with sleep, creates dependency, is bad for the heart and gut, and is dehydrating too” wrote:
❝Coffee causes tachycardia for me so staying away is best. People with colon cancer are urged to stay away from coffee completely.❞
These are great points! It brings us to our next potential myth:
Coffee is bad for the heart: True or False?
False… For most people.
Some people, like our subscriber above, have an adverse reaction to caffeine, such as tachycardia. An important reason (beyond basic decency) for anyone providing coffee to honor requests for decaff.
For most people, caffeine is “heart neutral”. It doesn’t provide direct benefits or cause direct harm, provided it is enjoyed in moderation.
See also: Can you overdose on caffeine?
Some quick extra notes…
That’s all we have time for in myth-busting, but it’s worth noting before we close that coffee has a lot of health benefits; we didn’t cover them today because they’re not contentious, but they are interesting nevertheless:
- Coffee is the world’s biggest source of antioxidants
- 65% reduced risk of Alzheimer’s for coffee-drinkers
- 67% reduced risk of type 2 diabetes for coffee-drinkers
- 43% reduced risk of liver cancer for coffee-drinkers
- 53% reduced suicide risk for coffee-drinkers
Enjoy!
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Study Tips for Exam Season?
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You’ve Got Questions? We’ve Got Answers!
Q: Any study tips as we approach exam season? A lot of the productivity stuff is based on working life, but I can’t be the only student!
A: We’ve got you covered:
- Be passionate about your subject! We know of no greater study tip than that.
- Find a willing person and lecture them on your subject. When one teaches, two learn!
- Your mileage may vary depending on your subject, but, find a way of studying that’s fun to you!
- If you can get past papers, get as many as you can, and use those as your “last minute” studying in the week before your exam(s). This will prime you for answering exam-style questions (and leverage state-dependent memory). As a bonus, it’ll also help ease any anxiety, because by the time of your exam it’ll be “same old, same old”!
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Pomegranate vs Cherries – Which is Healthier?
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Our Verdict
When comparing pomegranate to cherries, we picked the pomegranate.
Why?
In terms of macros, pomegranate is slightly higher in carbs, and/but 4x higher in fiber. That’s already a good start for pomegranates. Lest we be accused of cherry-picking, though, we’ll mention that pomegranate is also slightly higher in protein and fat, for what it’s worth—which is not a lot. As with most fruits, the protein and fat numbers are low importance next to the carb:fiber ratio.
When it comes to vitamins, pomegranate has more of vitamins B1, B2, B5, B6, B9. E. K, and choline. On the other hand, cherries have more of vitamins A and B3. The two fruits are equal in vitamin C. This all makes for a clear win for pomegranate.
In the category of minerals, pomegranate boasts more copper, magnesium, phosphorus, potassium, selenium, and zinc. In contrast, cherries have slightly more calcium. Another win for pomegranate.
Both of these fruits have beneficial polyphenols, each with a slightly different profile, but neither pressingly better than the other.
In short: as ever with healthy foods, enjoy both—diversity is good! But if you’re going to pick on, we recommend the pomegranate.
Want to learn more?
You might like to read:
- Pomegranate Peel’s Potent Potential ← so don’t throw it away!
- Cherries’ Very Healthy Wealth Of Benefits!
Take care!
Don’t Forget…
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Tilapia vs Cod – Which is Healthier?
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Our Verdict
When comparing tilapia to cod, we picked the tilapia.
Why?
Another case of “that which is more expensive is not necessarily the healthier”!
In terms of macros, tilapia has more protein and fats, as well as more omega-3 (and omega-6). On the downside, tilapia does have relatively more saturated fat, but at 0.94g/100g, it’s not exactly butter.
The vitamins category sees that tilapia has more of vitamins B1, B3, B5, B12, D, and K, while cod has more of vitamins B6, B9, and choline. A moderate win for tilapia.
When it comes to minerals, things are most divided; tilapia has more copper, iron, phosphorus, potassium, manganese, and selenium, while cod has more magnesium and zinc. An easy win for tilapia.
One other thing to note is that both of these fish contain mercury these days (and it’s worth noting: cod has nearly 10x more mercury). Mercury is, of course, not exactly a health food.
So, excessive consumption of either is not recommended, but out of the two, tilapia is definitely the one to pick.
Want to learn more?
You might like to read:
Farmed Fish vs Wild Caught: Know The Health Differences
Take care!
Don’t Forget…
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