The Five Key Traits Of Healthy Aging
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The Five Keys Of Aging Healthily
This is Dr. Daniel Levitin. He’s a neuroscientist, and his research focuses on aging, the brain, health, productivity, and creativity. Also music, and he himself is an accomplished musician also, but we’re not going to be focusing on that today.
We’re going to be looking at the traits that, according to science, promote healthy longevity in old age. In other words, the things that increase our healthspan, from the perspective of a cognitive scientist.
What does he say we should do?
Dr. Levitin offers us what he calls the “COACH” traits:
- Curiosity
- Openness
- Associations
- Conscientiousness
- Healthy practices
By “associations”, he means relationships. However, that would have made the acronym “CORCH”, and decisions had to be made.
Curiosity
Leonardo da Vinci had a list of seven traits he considered most important.
We’ll not go into those today (he is not our featured expert of the day!), but we will say that he agreed with Dr. Levitin on what goes at the top of the list: curiosity.
- Without curiosity, we will tend not to learn things, and learning things is key to keeping good cognitive function in old age
- Without curiosity, we will tend not to form hypotheses about how/why things are the way they are, so we will not exercise imagination, creativity, problem-solving, and other key functions of our brain
- Without curiosity, we will tend not to seek out new experiences, and consequently, our stimuli will be limited—and thus, so will our brains
Openness
Being curious about taking up ballroom dancing will do little for you, if you are not also open to actually trying it. But, openness is not just a tag-on to curiosity; it deserves its spot in its own right too.
Sometimes, ideas and opportunities come to us unbidden, and we have to be able to be open to those too. This doesn’t mean being naïve, but it does mean having at least a position of open-minded skepticism.
Basically, Dr. Levitin is asking us to be the opposite of the pejorative stereotype of “an old person stuck in their ways”.
Associations
People are complex, and so they bring complexities to our lives. Hopefully, positively stimulating ones. Without them to challenge us (again, hopefully in a positive way), we can get very stuck in a narrow field of experience.
And of course, having at least a few good friends has numerous benefits to health. There’s been a lot of research on this; 5 appears to be optimal.
- More than that, and the depth tends to tail off, and/or stresses ensue from juggling too many relationships
- Fewer than that, and we might be only a calendar clash away from loneliness
Friends provide social stimulation and mutual support; they’re good for our mental health and even our physiological immunity (counterintuitively, by means of shared germs).
And, a strong secure romantic relationship is something that has been found time and again to extend healthy life.
Note: by popular statistics, this benefit is conferred upon men partnered with women, men partnered with men, women partnered with women, but not women partnered with men.
There may be a causative factor that’s beyond the scope of this article which is about cognitive science, not feminism, but there could also be a mathematical explanation for this apparent odd-one-out:
Since women tend to live longer than men (who are also often older than their female partners), women who live the longest are often not in a relationship—precisely because they are widows. So these long-lived widows will tend to skew the stats, through no fault of their husbands.
On the flipside of this, for a woman to predecease her (statistically older and shorter-lived) husband will often require that she die quite early (perhaps due to accident or illness unrelated to age), which will again skew the stats to “women married to men die younger”, without anything nefarious going on.
Conscientiousness
People who score highly in the character trait “conscientiousness” will tend to live longer. The impact is so great, that a child’s scores will tend to dictate who dies in their 60s or their 80s, for example.
What does conscientiousness mean? It’s a broad character trait that’s scored in psychometric tests, so it can be things that have a direct impact on health, such as brushing one’s teeth, or things that are merely correlated, such as checking one’s work for typos (this writer does her best!).
In short, if you are the sort of person who attends to the paperwork for your taxes on time, you are probably also the sort of person who remembers to get your flu vaccination and cancer screening.
Healthy practices
This means “the usual things”, such as:
- Healthy diet (Mediterranean Diet consistently scores up top)
- Good exercise (especially the tendency to keep moving in general)
- Good sleep (7–9 hours, no compromises)
- Not drinking (or at least only very moderate consumption, but the only safe amount is zero)
- Not smoking (just don’t; there is no wiggle room on this one)
Want to learn more?
You can check out his book, which we reviewed all so recently, and you can also enjoy this video, in which he talks about matters concerning healthy aging from a neuroscientist’s perspective, ranging from heart health and neurodegeneration, to the myth of failing memory, to music and lifespan and more:
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Monosodium Glutamate: Sinless Flavor-Enhancer Or Terrible Health Risk?
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What’s The Deal With MSG?
There are a lot of popular beliefs about MSG. Is there a grain of truth, or should we take them with a grain of salt? We’ll leap straight into myth-busting:
MSG is high in salt
True (technically) False (practically)
- MSG is a salt (a monosodium salt of L-glutamic acid), but to call it “full of salt” in practical terms is like calling coffee “full of fruit”. (Coffee beans are botanically fruit)
- It does contain sodium, though which is what the S stands for!
- We talked previously about how MSG’s sodium content is much lower than that of (table) salt. Specifically, it’s about one third of that of sodium chloride (e.g. table salt).
MSG triggers gluten sensitivity
False!
Or at least, because this kind of absolute negative is hard to prove in science, what we can say categorically is: it does not contain gluten. We understand that the similar name can cause that confusion. However:
- Gluten is a protein, found in wheat (and thus wheat-based foods).
- Glutamate is an amino acid, found in protein-rich foods.
- If you’re thinking “but proteins are made from amino acids”, yes, they are, but the foundational amino acid of gluten is glutamine, not glutamate. Different bricks → different house!
The body can’t process MSG correctly
False!
The body has glutamate receptors throughout the gut and nervous system.
The body metabolizes glutamate from MSG just the same as from any other food that contains it naturally.
Read: Update on food safety of monosodium l-glutamate (MSG) ← evidence-based safety review
MSG causes “Chinese Restaurant Syndrome”
False!
Racism causes that. It finds its origins in what was originally intended as a satirical joke, that the papers picked up and ran with, giving it that name in the 1960s. As to why it grew and persisted, that has more to do with US politics (the US has been often at odds with China for a long time) and xenophobia (people distrust immigrants, such as those who opened restaurants), including nationalistic rhetoric associating immigrants with diseases.
Read: Xenophobia in America in the Age of Coronavirus and Beyond ← academic paper that gives quite a compact yet comprehensive overview
Research science, meanwhile, has not found any such correlation, in more than 40 years of looking.
PS: we realize this item in the list is very US-centric. Apologies to our non-US subscribers. We know that this belief isn’t so much of a thing outside the US—though it certainly can crop up elsewhere sometimes, too.
Are there any health risks associated with MSG, then?
Well, as noted, it does contain sodium, albeit much less than table salt. So… do go easy on it, all the same.
Aside from that, the LD50 (a way of measuring toxicity) of MSG is 15.8g/kg, so if for example you weigh 150lb (68 kg), don’t eat 2.2lb (a kilogram) of MSG.
There have been some studies on rats (or in one case, fruit flies) that found high doses of MSG could cause heart problems and/or promote obesity. However:
- this has not been observed to be the case in humans
- those doses were really high, ranging from 1g/kg to 8g/kg. So that’d be the equivalent of our 150lb person eating it by the cupful
- it was injected (as a solution) into the rats, not ingested by them
- so don’t let someone inject you with a cup of MSG!
Read: A review of the alleged health hazards of monosodium glutamate
Bottom line on MSG and health:
Enjoy in moderation, but enjoy if you wish! MSG is just the salt form of the amino acid glutamate, which is found naturally in many foods, including shrimp, seaweed, and tomatoes.
Scientists have spent more than 40 years trying to find health risks for MSG, and will probably keep trying (which is as science should be), but for now… Everything has either come up negative, or has been the result of injecting laboratory animals with megadoses.
If you’d like to try it in your cooking as a low-sodium way to bring out the flavor of your dishes, you can order it online. Cheapest in bulk, but try it and see if you like it first!
(I’ll be real with you… I have 5 kg in the pantry myself and use about half a teaspoon a day, cooking for two)
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Cordyceps: Friend Or Foe?
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Cordyceps: friend or foe?
Cordyceps is a famously frightening fungus. It’s the one responsible for “zombie ants” and other zombie creatures, and it’s the basis for the existential threat to humanity in the TV show The Last of Us.
It’s a parasitic fungus that controls the central and peripheral nervous systems of its host, slowly replacing the host’s body, as well as growing distinctive spines that erupt out of the host’s body. Taking over motor functions, it compels the host to do two main things, which are to eat more food, and climb to a position that will be good to release spores from.
Fortunately, none of that matters to humans. Cordyceps does not (unlike in the TV show) affect humans that way.
What does Cordyceps do in humans?
Cordyceps (in various strains) is enjoyed as a health supplement, based on a long history of use in Traditional Chinese Medicine, and nowadays it’s coming under a scientific spotlight too.
The main health claims for it are:
- Against inflammation
- Against aging
- Against cancer
- For blood sugar management
- For heart health
- For exercise performance
Sounds great! What does the science say?
There’s a lot more science for the first three (which are all closely related to each other, and often overlapping in mechanism and effect).
So let’s take a look:
Against inflammation
The science looks promising for this, but studies so far have either been in vitro (cell cultures in petri dishes), or else murine in vivo (mouse studies), for example:
- Anti-inflammatory effects of Cordyceps mycelium in murine macrophages
- Cordyceps sinensis as an immunomodulatory agent
- Immunomodulatory functions of extracts from Cordyceps cicadae
- Cordyceps pruinosa inhibits in vitro and in vivo inflammatory mediators
In summary: we can see that it has anti-inflammatory properties for mice and in the lab; we’d love to see the results of studies done on humans, though. Also, while it has anti-inflammatory properties, it performed less well than commonly-prescribed anti-inflammatory drugs, for example:
❝C. militaris can modulate airway inflammation in asthma, but it is less effective than prednisolone or montelukast.❞
Against aging
Because examining the anti-aging effects of a substance requires measuring lifespans and repeating the experiment, anti-aging studies do not tend to be done on humans, because they would take lifetimes to perform. To this end, it’s inconvenient, but not a criticism of Cordyceps, that studies have been either mouse studies (short lifespan, mammals like us) or fruit fly studies (very short lifespan, genetically surprisingly similar to us).
The studies have had positive results, with typical lifespan extensions of 15–20%:
- The lifespan-extending effect of Cordyceps sinensis in normal mice
- Cordyceps sinensis oral liquid prolongs the lifespan of the fruit fly, Drosophila melanogaster
- Anti-aging activity of polysaccharides from Cordyceps militaris
- Anti-aging effect of Cordyceps sinensis extract
Against cancer
Once again, the studies here have been in vitro, or murine in vivo. They do look good though:
In vitro (human cell cultures in a lab):
In vivo (mouse studies):
Summary of these is: Cordyceps quite reliably inhibits tumor growth in vitro (human cell cultures) and in vivo (mouse studies). However, trials in human cancer patients are so far conspicuous by their absence.
For blood sugar management
Cordyceps appears to mimic the action of insulin, without triggering insulin sensitivity. For example:
The anti-hyperglycemic activity of the fruiting body of Cordyceps in diabetic rats
There were some other rat/mouse studies with similar results. No studies in humans yet.
For heart health
Cordyceps contains adenosine. You may remember that caffeine owes part of its stimulant effect to blocking adenosine, the hormone that makes us feel sleepy. So in this way, Cordyceps partially does the opposite of what caffeine does, and may be useful against arrhythmia:
Cardiovascular protection of Cordyceps sinensis act partially via adenosine receptors
For exercise performance
A small (30 elderly participants) study found that Cordyceps supplementation improved VO2 max by 7% over the course of six weeks:
However, another small study (22 young athletes) failed to reproduce those results:
Cordyceps Sinensis supplementation does not improve endurance exercise performance
In summary…
Cordyceps almost certainly has anti-inflammation, anti-aging, and anti-cancer benefits.
Cordyceps may have other benefits too, but the evidence is thinner on the ground for those, so far.
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Oats vs Pearl Barley – Which is Healthier?
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Our Verdict
When comparing oats to pearl barley, we picked the oats.
Why?
In terms of macronutrients first, pearl barley has about three times the carbs for only the same amount of protein and fiber—if it had been regular barley rather than pearl parley, it’d have about twice the fiber, but pearl barley has had the fibrous husk removed.
Vitamins really set the two part, though: oats have a lot more (60x more) vitamin A, and notably more of vitamins B1, B2, B3, B5, B6, and B9, as well as 6x more vitamin E. In contrast, pearl barley has a little more vitamin K and choline. An easy win for oats in this section.
In the category of minerals, oats have over 6x more calcium, 3x more iron, and a little more magnesium, manganese, and phosphorus. Meanwhile, pearl barley boats a little more copper, potassium, selenium, and zinc. So, a more moderate win for oats in this category.
They are both very good for the gut, unless you have a gluten intolerance/allergy, in which case, oats are the only answer here since pearl barley, as per barley in general, has gluten as its main protein (oats, meanwhile, do not contain gluten, unless by cross-contamination).
Adding up all the sections, this one’s a clear win for oats.
Want to learn more?
You might like to read:
- Eat More (Of This) For Lower Blood Pressure
- Making Friends With Your Gut (You Can Thank Us Later)
- Gluten: What’s The Truth?
Take care!
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Why We Remember – by Dr. Charan Ranganath
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As we get older, forgetfulness can become more of a spectre; the threat that one day it could be less “where did I put my sunglasses?” and more “who is this person claiming to be my spouse?”.
Dr. Ranganath explores in this work the science of memory, from a position of neurobiology, but also in application. How and why we remember, and how and why we forget, and how and why both are important.
There is a practical element to the book too; we read about things that increase our tendency to remember (and things that increase our tendency to forget), and how we can leverage that information to curate our memory in an active, ongoing basis.
The style of the book is quite casual in tone for such a serious topic, but there’s plenty of hard science too; indeed there are 74 pages of bibliography cited.
Bottom line: while filled with a lot of science, this is also a very human book, and a helpful guide to building and preserving our memory.
Click here to check out “Why We Remember”, and learn how to hold on to what matters the most!
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Human Connection In An All-Too-Busy World
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Many of us, in many ways, have more discretionary time than ever… On paper.
But rather than the 8-hour block of work of yesteryear, nowadays the things that take our time often come in a series of short bursts that punctuate our day.
This means that while in theory, we have n hours of “free” time per day, we actually have 9 minutes here, 23 minutes there, 1 hour 6 minutes somewhere else, and so on.
Social commitments, meanwhile, tend to require not only that we have time in a block, but also, that the time around that block also be sufficiently free, for travelling, preparation, etc.
The result? “We must do this again, and not leave it so long next time!” we say, sincerely, to the friend whom we will next see again in approximately 17 months’ time.
The problem is how our many theoretically-small obligations reduce the rest of our time to “time confetti”, and that happens on the large scale like we saw above, as well as on the small scale of “Ah, I have an hour to relax between these two things” and then suddenly the time is gone, once again reduced to time confetti:
Time Confetti and the Broken Promise of Leisure
So, how to maintain human connection with people beyond those with whom we live?
Some is infinitely better than none
Let’s say you want to call a friend or relative. There may be generational differences in how much one is expected to arrange this by text first, vs just calling, but either way, you don’t have to have an open-ended block of time, and sometimes, it’s better if you don’t.
Establish, at the start of the call, “Before we get into catching up, how are we for time, by the way? For my part, I’ll have to go by such-and-such a time”, and then work with that.
The benefit of doing this is that you’ll both know enough about the time constraints to use the time appropriately; you won’t run out the clock on smalltalk before getting to something big, and you’ll both come away feeling satisfied that you shared and were shared-with in a meaningful fashion.
In contrast, guessing at time constraints can leave big things clipped off, or else result in someone “looking for a way to politely end this conversation that stopped being interesting a while ago but it’ll seem rude if I say I have to go now”, of the kind that results in someone not being so open to a call next time.
Don’t rush to dismiss texts as a medium for meaningful connection
When text messages were first a thing, you’ll remember how we were all working within a very short character limit and a cost-per-message. It was telegrams for the modern age, basically.
Nowadays, that isn’t so; we can write as much or as little as we like, and this has two benefits:
- We can have longer, meaningful conversations around the other stuff in our life. We can reply in seconds, or after making a cup of tea and thinking about it, or after our grocery-chopping trip, or whenever suits us. Suddenly, time confetti isn’t such a barrier to human connection. Writer’s example: my prime social time in this manner is when I’m cooking dinner (which is often about an hour). There’s no way I could have a phonecall while doing that; my bad hearing notwithstanding, I just have my hands full too often with much else going on. But texting? I can do that in the several-minute gaps between assorted culinary tasks, while I’m waiting for the kettle to boil or the onions to brown or whatever.
- Sometimes, the brevity makes it easier. A quick text saying “Hey, just to let you know I’m thinking of you, and hope your day is going well!”, or “Unrelated to anything: I was just thinking about how I’m glad to have you in my life; you’re a good friend, and I appreciate that more than I often remember to say. Anyway, that’s all; it was just on my mind. I hope your day is going well!”
(The cheery closing words in those last two text message examples help signify: “don’t worry, I’m fine and am not looking for anything from you”, which will help the recipient to relax, and counterintuitively, more likely to reply with some kind words of their own, knowing that they’re not signing up for a potentially deep talk when they also have time confetti issues going on)
Seize the moment (and also let it go)
You probably have many small interactions with strangers, most days. In the store, walking the dog, at the doctor’s office, etc. So, two things:
- Make smalltalk. And if you’re not one for traditional smalltalk topics (weather etc), or even if you are, a level-up is:
- Compliment sincerely. Straight out of “How To Win Friends And Influence People”, of course, but it creates a moment of genuine connection; you say a thing, their day is improved, they smile, you complete your business with a smile of your own and go about your day.
(of course, do steer clear of anything that could be interpreted as flirting, if that is not your intent, and really it should never be your intent when it comes to the captive audience of someone who will get fired if they’re not nice to you)
But, with a little practice, these little moments add up to a lot more human connection than if we treat the strangers with whom we interact as though they were merely part of the scenery.
Want more than that?
Check out:
How To Beat Loneliness & Isolation
Take care!
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Basic Baked Tofu
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One of the main criticisms of tofu is that it is tasteless. Well, so is flour, but you’re not supposed to eat it plain, and the same goes for tofu. It’s a blank canvas that you get to decide what to do with—not to mention, it’s a canvas that’s very high in protein, and is a complete protein too, containing all essential amino acids. Anyway, here’s a starter recipe that elevates tofu from “nutrition” to “nutritious tasty snack”!
We were going to do a fancier recipe today, but considered that it might be judicious to cover this basic element first, that can be incorporated into a larger recipe later, a bit like we have done with recipes such as our Tasty Versatile Rice, and Plant-Based Healthy Cream Cheese (amongst others).
You will need
- 1 block of extra-firm tofu; these are quite standardized in size; it should be about 12oz; don’t worry if it’s a little more or less.
- 2 tbsp arrowroot powder (or potato starch if you don’t have arrowroot)
- 1½ tbsp extra virgin olive oil
- 1 tbsp nutritional yeast
- 1 tsp black pepper
- ½ tsp MSG or 1 tsp low-sodium salt
- Optional: ½ tsp garlic powder
- Optional: ½ tsp ground turmeric
Method
(we suggest you read everything at least once before doing anything)
1) Preheat the oven to 425ºF / 220ºC.
2) Press the tofu for about 15 minutes (to remove excess moisture), using a tofu press if you have one. If you don’t, then here is an example product on Amazon, or alternatively, you can go with the time-honored tradition of cutting the tofu lengthways into slabs, and wrapping it in a lint-free kitchen towel or muslin cloth, and pressing it with heavy books. We don’t recommend pressing for more than about 15 minutes, as you are going to bake the tofu so you don’t want it too dry going in.
3) Cut the tofu into cubes. Size is up to you, but half-inch cubes are very respectable.
4) Combine the tofu cubes in a big bowl with the oil and seasonings, including the nutritional yeast but not the arrowroot powder or potato starch yet. You will need to toss them gently (very gently; they are fragile!) to combine.
5) Add the arrowroot powder or potato starch, and again toss gently to combine. We do this last, because it would stop the other things from sticking properly if we did it earlier.
6) Arrange the tofu on a baking tray lined with baking paper, in a single layer so that the cubes don’t touch. Bake for 15 minutes, turn them over, and bake for a further 15 minutes on the other side. They should now be golden and crisp, but if they’re not, just give them a little more time.
7) Serve as a snack, or set aside for whatever else you’re going to do with them in a larger more complex recipe.
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- Tofu vs Seitan – Which is Healthier?
- Plant vs Animal Protein: Head to Head
- Our Top 5 Spices: How Much Is Enough For Benefits?
Take care!
Don’t Forget…
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