L-Theanine: What’s The Tea?
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L-Theanine: What’s The Tea?
We’ve touched previously on l-theanine, when this newsletter was new, and we had only a few hundred subscribers and the carefully organized format wasn’t yet what it is today.
So now it’s time to give this potent dietary compound / nutritional supplement the “Monday Research Review” treatment…
What is it?
L-theanine is an amino acid found in tea. The human body can’t produce it, and/but it’s not essential for humans. It does have a lot of benefits, though. See for example:
L-Theanine as a Functional Food Additive: Its Role in Disease Prevention and Health Promotion
How does it work?
L-theanine works by moderating and modulating the brain’s neurotransmitters.
This sounds fancy, but basically it means: it doesn’t actually add anything in the manner of a drug, but it changes how we use what we have naturally.
What does it do? Read on…
It increases mental focus
It has been believed that l-theanine requires the presence of caffeine to achieve this (i.e., it’s a combination-only effect). For example:
But as it turns out, when a group of researchers actually checked… This isn’t true, as Foxe et al. write:
❝We asked whether either compound alone, or both in combination, would affect performance of the task in terms of reduced error rates over time, and whether changes in alpha-band activity would show a relationship to such changes in performance. When treated with placebo, participants showed a rise in error rates, a pattern that is commonly observed with increasing time-on-task, whereas after caffeine and theanine ingestion, error rates were significantly reduced. The combined treatment did not confer any additional benefits over either compound alone, suggesting that the individual compounds may confer maximal benefits at the dosages employed❞
It promotes a calmly wakeful feeling of serenity
Those are not words typically found in biopharmaceutical literature, but they’re useful here to convey:
- L-theanine promotes relaxation without causing drowsiness
- L-theanine promotes mental alertness without being a stimulant
Here is where l-theanine really stands out from caffeine. If both substances promote mental focus, but one of them does it by making us “wired” and the other does it while simultaneously promoting calm, it makes the choice between them clearer!
Read more: L-theanine, a natural constituent in tea, and its effect on mental state
It relieves stress and anxiety
Building on from the above, but there’s more: l-theanine relieves stress and anxiety in people experiencing stressful situations, without any known harmful side effects… This is something that sets it apart from a lot of anxiolytic (antianxiety) drugs!
Here’s what a big systematic review of clinical trials had to say:
Theanine consumption, stress and anxiety in human clinical trials: A systematic review
L-theanine has other benefits too
We’ve talked about some of the most popular benefits of l-theanine, and we can’t make this newsletter too long, but research also suggests that it…
- Supports healthy weight management
- Reduces inflammation
- Supports immune health
- Helps fight cancer
- May extend lifespan ← this one’s a C. elegans study, but despite being a tiny worm, they actually function very similarly to humans on a cellular level; it’s why they’re used so much for anti-aging research
If you’re interested in this topic, we recommend also reading our previous article on l-theanine—pardon that we hadn’t really nailed down our style yet—but there’s a bunch of useful information about how l-theanine makes caffeine “better” in terms of benefits. We also talk dosage, and reference some other studies we didn’t have room to include today!
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Dealing With Waking Up In The Night
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It’s Q&A Day at 10almonds!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
❝I’m now in my sixties and find that I invariably wake up at least once during the night. Is this normal? Even if it is, I would still like, once in a while, to sleep right through like a teenager. How might this be achieved, without pills?❞
Most people wake up briefly between sleep cycles, and forget doing so. But waking up for more than a brief moment is indeed best avoided. In men of your age, if you’re waking to pee (especially if it’s then not actually that easy to pee), it can be a sign of an enlarged prostate. Which is again a) normal b) not optimal.
By “without pills” we’ll assume you mean “without sleeping pills”. There are options to treat an enlarged prostate, including well-established supplements. We did a main feature on this:
Prostate Health: What You Should Know
If the cause of waking up is something else, then again this is common for everyone as we get older, and again it’s not optimal. But since there are so many possible causes (and thus solutions), it’s more than we can cover in less than a main feature, so we’ll have to revisit this later.
Meanwhile, take care!
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Comfortable with Uncertainty – by Pema Chödrön
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This book is exactly what the subtitle claims it to be: 108 teachings on cultivating fearlessness and compassion. They are short extracts, entire of themselves, taken from Chödrön’s wider work and arranged to offer her insights and advices on this one topic, in one place.
It is worth noting, by the way, that the author is a Buddhist nun, and as such, the principles and practices are Buddhist in origin. If that’s a problem for you, then this book will not be for you. It does not, however, require that the reader be Buddhist to benefit, simply that one has a will to be calm in the face of chaos, and yet not indifferent—rather, to take on the challenges of life with a whole heart.
And about that compassion? This is about alleviating suffering; your own, and the suffering in the world as a whole, increasingly uncertain as this world is. And being brave enough to do that, in a world that is not always gentle.
The style is idiosyncratic, and you will likely love it or hate it. If you love it, then you will find this book at once both soothing and empowering; if not, you will put the book down and pick up a book on CBT or something instead.
Bottom line: this book absolutely does deliver on its title/subtitle promises—provided you, dear reader, internalize it and practise it.
Click here to check out Comfortable with Uncertainty, and get comfortable with uncertainty!
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Colloidal Gold’s Impressive Claims
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All That Glitters…
Today we’ll be examining colloidal gold supplementation.
This issue of 10almonds brought to you by the writer suddenly getting lots of advertisements for this supplement. It’s not a new thing though, and has been around in one form or another since pretty much forever.
Colloidal gold is…
- Gold, as in the yellow metal
- Colloidal, as in “very tiny insoluble particles dispersed though another substance (such as water)”
What are the claims made for it?
Honestly, just about everything is claimed for it. But to go with some popular claims:
- Reduces inflammation
- Supports skin health
- Boosts immune function
- Combats aging
- Improves cognitive function
So, what does the science say?
Does it do those things?
The short and oversimplified answer is: no
However, there is a little bit of tangential merit, so we’re going to talk about the science of it, and how the leap gets made between what the science says and what the advertisements say.
First… What makes gold so special, in general? Historically, three things:
- It’s quite rare
- It’s quite shiny
- It’s quite unreactive
- The first is about supply and demand, so that’s not very important to us in this article.
- The second is an aesthetic quality, which actually will have a little bit of relevance, but not much.
- The third has been important historically (because it meant that shiny gold stayed shiny, because it didn’t tarnish), and now also important industrially too, as gold can be used in many processes where we basically need for nothing to happen (i.e., a very inert component is needed)
That third quality—its unreactivity—has become important in medicine.
When scientists need a way to deliver something (without the delivering object getting eaten by the body’s “eat everything” tendencies), or otherwise not interact chemically with anything around, gold is an excellent choice.
Hence gold teeth, and gold fillings, by the way. They’re not just for the bling factor; they were developed because of their unreactivity and thus safety.
So, what about those health claims we mentioned above?
Here be science (creative interpretations not included)
The most-backed-by-science claim from that list is “reduces inflammation”.
Websites selling colloidal gold cite studies such as:
Gold nanoparticles reduce inflammation in cerebral microvessels of mice with sepsis
A promising title!The results of the study showed:
❝20 nm cit-AuNP treatment reduced leukocyte and platelet adhesion to cerebral blood vessels, prevented BBB failure, reduced TNF- concentration in brain, and ICAM-1 expression both in circulating polymorphonuclear (PMN) leukocytes and cerebral blood vessels of mice with sepsis. Furthermore, 20 nm cit-AuNP did not interfere with the antibiotic effect on the survival rate of mice with sepsis.❞
That “20 nm cit-AuNP” means “20 nm citrate-covered gold nanoparticles”
So it is not so much the antioxidant powers of gold being tested here, as the antioxidant powers of citrate, a known antioxidant. The gold was the carrying agent, whose mass and unreactivity allowed it to get where it needed to be.
The paper does say the words “Gold nanoparticles have been demonstrated to own important anti-inflammatory properties“ in the abstract, but does not elaborate on that, reference it, or indicate how.
Websites selling colloidal gold also cite papers such as:
Anti-inflammatory effect of gold nanoparticles supported on metal oxides
Another promising title! However the abstract mentions:
❝The effect was dependent on the MOx NPs chemical nature
[…]
The effect of Au/TiO2 NPs was not related to Au NPs size❞
MOx NPs = mineral oxide nanoparticles. In this case, the gold was a little more than a carrying agent, though, because the gold is described and explained as being a catalytic agent (i.e., its presence helps the attached mineral oxides react more quickly).
We said that was the most-backed claim, and as you can see, it has some basis but is rather tenuous since the gold by itself won’t do anything; it just helps the mineral oxides.
Next best-backed claim builds from that, which is “supports skin health”.
Sometimes colloidal gold is sold as a facial tonic. By itself it’ll distribute (inert) gold nanoparticles across your skin, and may “give you a healthy glow”, because that’s what happens when you put shiny wet stuff on your face.
Healthwise, if the facial tonic also contains some of the minerals we mentioned above, then it may have an antioxidant effect. But again, no minerals, no effect.
The claim that it “combats aging” is really a tag-on to the “antioxidant” claim.
As for the “supports immune health” claim… Websites selling colloid gold cite studies such as:
To keep things brief: gold can fight infectious diseases in much the same way that forks can fight hunger. It’s an inert carrying agent.
As for “improves cognitive function”? The only paper we could find cited was that mouse sepsis study again, this time with the website saying “researchers found that rats treated with colloidal gold showed improved spatial memory and learning ability“ whereas the paper cited absolutely did not claim that, not remotely, not even anything close to that. It wasn’t even rats, it was mice, and they did not test their memory or learning.
Is it safe?
Colloidal gold supplementation is considered very safe, precisely because gold is one of the least chemically reactive substances you could possibly consume. It is special precisely because it so rarely does anything.
However, impurities could be introduced in the production process, and the production process often involves incredibly harsh reagents to get the gold ions, and if any of those reagents are left in the solution, well, gold is safe but sodium borohydride and chloroauric acid aren’t!
Where can I get some?
In the unlikely event that our research review has given you an urge to try it, here’s an example product on Amazon
Take care!
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What We Don’t Talk About When We Talk About Fat – by Aubrey Gordon
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There are books aplenty to encourage and help you to lose weight. This isn’t one of those.
There are also books aplenty to encourage and help you to accept yourself and your body at the weight you are, and forge self-esteem. This isn’t one of those, either—in fact, it starts by assuming you already have that.
There are fair arguments for body neutrality, and fat acceptance. Very worthy also is the constant fight for bodily sovereignty.
These are worthy causes, but they’re for the most-part not what our author concerns herself with here. Instead, she cares for a different and very practical goal: fat justice.
In a world where you may be turned away from medical treatment if you are over a certain size, told to lose half your bodyweight before you can have something you need, she demands better. The battle extends further than healthcare though, and indeed to all areas of life.
Ultimately, she argues, any society that will disregard the needs of the few because they’re a marginal demographic, is a society that will absolutely fail you if you ever differ from the norm in some way.
All in all, an important (and for many, perhaps eye-opening) book to read if you are fat, care about fat people, are a person of any size, or care about people in general.
Pick Up Your Copy of “What We Don’t Talk About When We Talk About Fat”, on Amazon Today!
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The Myth of Normal – by Dr. Gabor Maté and Daniel Maté
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A lot of popular beliefs (and books!) start with the assumption that everyone is, broadly speaking, “normal”. That major diversions from “normal” happen only to other people… And that minor diversions from “normal” are just something to suck up and get over—magically effecting a return to “normalcy”.
Dr. Maté, however, will have none of these unhelpful brush-offs, and observes that in fact most if not all of us have been battered by the fates one way or another. We just:
- note that we have more similarities than differences, and
- tend to hide our own differences (to be accepted) or overlook other people’s (to make them more acceptable).
How is this more helpful? Well, the above approach isn’t always, but Mate has an improvement to offer:
We must see flawed humans (including ourselves) as the product of our environments… and/but see this a reason to look at improving those environments!
Beyond that…
The final nine chapters of the books he devotes to “pathways to wholeness” and, in a nutshell, recovery. Recovery from whatever it was for you. And if you’ve had a life free from anything that needs recovering from, then congratulations! You doubtlessly have at least one loved one who wasn’t so lucky, though, so this book still makes for excellent reading.
Dr. Maté was awarded the Order of Canada for his medical work and writing. His work has mostly been about addiction, trauma, stress, and childhood development. He co-wrote this book with his son, Daniel.
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The Origin of Everyday Moods – by Dr. Robert Thayer
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First of all, what does this title mean by “everyday moods”? By this the author is referring to the kinds of moods we have just as a matter of the general wear-and-tear of everyday life—not the kind that come from major mood disorders and/or serious trauma.
The latter kinds of mood take less explaining, in any case. Dr. Thayer, therefore, spends his time on the less obvious ones—which in turn are the ones that affect most of the most, every day.
Critical to Dr. Thayer’s approach is the mapping of moods by four main quadrants:
- High energy, high tension
- High energy, low tension
- Low energy, high tension
- Low energy, low tension
…though this can be further divided into 25 sectors, if we rate each variable on a scale of 0–4. But for the first treatment, it suffices to look at whether energy and tension are high or low, respectively, and which we’d like to have more or less of.
Then (here be science) how to go about achieving that in the most efficient, evidence-based ways. So, it’s not just a theoretical book; it has great practical value too.
The style of the book is accessible, and walks a fine line between pop-science and hard science, which makes it a great book for laypersons and academics alike.
Bottom line: if you’d like the cheat codes to improve your moods and lessen the impact of bad ones, this is the book for you.
Click here to check out The Origin of Everyday Moods, and manage yours!
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