What Are Nootropics, Really?
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What are nootropics, really?
A nootropic is anything that functions as a cognitive enhancer—in other words, improves our brainpower.
These can be sensationalized as “smart drugs”, misrepresented excitingly in science fiction, meme-ified in the mundane (“but first, coffee”), and reframed entirely, (“exercise is the best nootropic”).
So, clearly, “nootropics” can mean a lot of different things. Let’s look at some of the main categories…
The neurochemical modulators
These are what often get called “smart drugs”. They are literally drugs (have a chemical effect on the body that isn’t found in our diet), and they affect the levels of certain neurotransmitters in the brain, such as by:
- Adding more of that neurotransmitter (simple enough)
- Decreasing the rate at which we lose that neurotransmitter (re-uptake inhibitors)
- Antagonizing an unhelpful neurotransmitter (doing the opposite thing to it)
- Blocking an unhelpful neurotransmitter (stopping the receptors from receiving it)
“Unhelpful” here is relative and subjective, of course. We need all the neurotransmitters that are in our brain, after all, we just don’t need all of them all the time.
Examples: modafinil, a dopamine re-uptake inhibitor (mostly prescribed for sleep disorders), reduces the rate at which our brains scrub dopamine, resulting in a gradual build-up of dopamine that we naturally produced, so we get to enjoy that dopamine for longer. This will tend to promote wakefulness, and may also help with problem-solving and language faculties—as well as giving a mood boost. In other words, all things that dopamine is used for. Mirtazaрine, an adrenoreceptor agonist (mostly prescribed as an antidepressant), increases noradrenergic neurotransmission, thus giving many other brain functions a boost.
Why it works: our brains need healthy levels of neurotransmitters, in order to function well. Those levels are normally self-regulating, but can become depleted in times of stress or fatigue, for example.
The metabolic brain boosters
These are the kind of things that get included in nootropic stacks (stack = a collection of supplements and/or drugs that complement each other and are taken together—for example, a multivitamin tablet could be described as a vitamin stack) even though they have nothing specifically relating them to brain function. Why are they included?
The brain needs so much fuel. Metabolically speaking, it’s a gas-guzzler. It’s the single most resource-intensive organ of our body, by far. So, metabolic brain boosters tend to:
- Increase blood flow
- Increase blood oxygenation
- Increase blood general health
- Improve blood pressure (this is relative and subjective, since very obviously there’s a sweet spot)
Examples: B-vitamins. Yep, it can be that simple. A less obvious example might be Co-enzyme Q10, which supports energy production on a cellular level, and good cardiovascular health.
Why it works: you can’t have a healthy brain without a healthy heart!
We are such stuff as brains are made of
Our brains are made of mostly fat, water, and protein. But, not just any old fat and protein—we’re at least a little bit special! So, brain-food foods tend to:
- Give the brain the fats and proteins it’s made of
- Give the brain the stuff to make the fats and proteins it’s made of (simpler fats, and amino acids)
- Give the brain hydration! Just having water, and electrolytes as appropriate, does this
Examples: healthy fats from nuts, seeds, and seafood; also, a lot of phytonutrients from greens and certain fruits. Long-time subscribers may remember our article “Brain Food: The Eyes Have It!” on the importance of dietary lutein in reducing Alzheimer’s risk, for example
Why it works: this is matter of structural upkeep and maintenance—our brains don’t work fabulously if deprived of the very stuff they’re made of! Especially hydration is seriously underrated as a nootropic factor, by the way. Most people are dehydrated most of the time, and the brain dehydrates quickly. Fortunately, it rehydrates quickly as well when we take hydrating liquids.
Weird things that sound like ingredients in a witch’s potion
These are too numerous and too varied in how they work to cover here, but they do appear a lot in nootropic stacks and in popular literature on the subject.
Often they work by one of the mechanisms described above; sometimes we’re not entirely sure how they work, and have only measured their effects sufficiently to know that, somehow, they do work.
Examples: panax ginseng is one of the best-studied examples that still remains quite mysterious in many aspects of its mechanism. Lion’s Mane (the mushroom, not the jellyfish or the big cat hairstyle), meanwhile, is known to contain specific compounds that stimulate healthy brain cell growth.
Why it works: as we say, it varies so much from on ingredient to another in this category, so… Watch out for our Research Review Monday features, as we’ll be covering some of these in the coming weeks!
(PS, if there’s any you’d like us to focus on, let us know! We always love to hear from you. You can hit reply to any of our emails, or use the handy feedback widget at the bottom)
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You Are Not Broken – by Dr. Kelly Casperson
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Many women express “I think I’m broken down there”, and it turns out simply that neither they nor their partners had the right knowledge, that’s all. The good news is: bedroom competence is an entirely learnable skill!
Dr. Casperson is a urologist, and over the years has expanded her work into all things pelvic, including the relevant use of both systemic and topical hormones (as in, hormones to increase overall blood serum levels of that hormone, like most HRT, and also, creams and lotions to increase levels of a given hormone in one particular place).
However, this is not 200 pages to say “take hormones”. Rather, she covers many areas of female sexual health and wellbeing, including yes, simply pleasure. From the physiological to the psychological, Dr. Casperson talks the reader through avoiding blame games and “getting out of your head and into your body”.
Bottom line: if you (or a loved one) are one of the many women who have doubts about being entirely correctly set up down there, then this book is definitely for you.
Click here to check out You Are Not Broken, and indeed stop “should-ing” all over your sex life!
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Olfactory Training, Better
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Anosmia, by any other name…
The loss of the sense of smell (anosmia) is these days well-associated with COVID and Long-COVID, but also can simply come with age:
National Institute of Aging | How Smell & Taste Change With Age
…although it can also be something else entirely:
❝Another possibility is a problem with part of the nervous system responsible for smell.
Some studies have suggested that loss of smell could be an early sign of a neurodegenerative disease, such as Alzheimer’s or Parkinson’s disease.
However, a recent study of 1,430 people (average age about 80) showed that 76% of people with anosmia had normal cognitive function at the study’s end.❞
Read more: Harvard Health | Is it normal to lose my sense of smell as I age?
We’d love to look at and cite the paper that they cite, but they didn’t actually provide a source. We did find some others, though:
❝Olfactory capacity declines with aging, but increasing evidence shows that smell dysfunction is one of the early signs of prodromal neurodegenerative diseases such as Alzheimer’s and Parkinson’s disease.
The loss of smell is considered a clinical sign of early-stage disease and a marker of the disease’s progression and cognitive impairment.❞
Read more: Neurons, Nose, and Neurodegenerative Diseases: Olfactory Function and Cognitive Impairment
What’s clear is the association; what’s not clear is whether one worsens the other, and what causal role each might play. However, the researchers conclude that both ways are possible, including when there is another, third, underlying potential causal factor:
❝Ongoing studies on COVID-19 anosmia could reveal new molecular aspects unexplored in olfactory impairments due to neurodegenerative diseases, shedding a light on the validity of smell test predictivity of cognitive dementia.
The neuroepithelium might become a new translational research target (Neurons, Nose, and Neurodegenerative diseases) to investigate alternative approaches for intranasal therapy and the treatment of brain disorders. ❞
~ Ibid.
Another study explored the possible mechanisms of action, and found…
❝Olfactory impairment was significantly associated with increased likelihoods of MCI, amnestic MCI, and non-amnestic MCI.
In the subsamples, anosmia was significantly associated with higher plasma total tau and NfL concentrations, smaller hippocampal and entorhinal cortex volumes, and greater WMH volume, and marginally with lower AD-signature cortical thickness.
These results suggest that cerebral neurodegenerative and microvascular lesions are common neuropathologies linking anosmia with MCI in older adults❞
- MCI = Mild Cognitive Impairment
- NfL = Neurofilament Light [Chain]
- WMH = White Matter Hyperintensity
- AD =Alzheimer’s Disease
Read more: Anosmia, mild cognitive impairment, and biomarkers of brain aging in older adults
How to act on this information
You may be wondering, “this is fascinating and maybe even a little bit frightening, but how is this Saturday’s Life Hacks?”
We wanted to set up the “why” before getting to the “how”, because with a big enough “why”, it’s much easier to find the motivation to act on the “how”.
Test yourself
Or more conveniently, you and a partner/friend/relative can test each other.
Simply do like a “blind taste testing”, but for smell. Ideally these will be a range of simple and complex odors, and commercially available smell test kits will provide these, if you don’t want to make do with random items from your kitchen.
If you’d like to use a clinical diagnostic tool, you can check out:
Clinical assessment of patients with smell and taste disorders
…and especially, this really handy diagnostic flowchart:
Algorithm of evaluation of a patient who has olfactory loss
Train yourself
“Olfactory training” has been the got-to for helping people to regain their sense of smell after losing it due to COVID.
In simple terms, this means simply trying to smell things that “should” have a distinctive odor, and gradually working up one’s repertoire of what one can smell.
You can get some great tips here:
AbScent | Useful Insights Into Smell Training
Hack your training
An extra trick was researched deeply in a recent study which found that multisensory integration helped a) initially regain the ability to smell things and b) maintain that ability later without the cross-sensory input.
What that means: you will more likely be able to smell lemon while viewing the color yellow, and most likely of all to be able to smell lemon while actually holding and looking at a slice of lemon. Having done this, you’re more likely to be able to smell (and distinguish) the odor of lemon later in a blind smell test.
In other words: with this method, you may be able to cut out many months of frustration of trying and failing to smell something, and skip straight to the “re-adding specific smells to my brain’s olfactory database” bit.
Read the study: Olfactory training: effects of multisensory integration, attention towards odors and physical activity
Or if you prefer, here’s a pop-science article based on that:
One in twenty people has no sense of smell—here’s how they might get it back
Take care!
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Continuous Glucose Monitors Without Diabetes: Pros & Cons
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The “Glucose Goddess”, biochemist Jessie Inchauspé, gives us the low-down:
Knowledge is power (but watch out)
A continuous glucose monitor (CGM) is a device that continually monitors glucose levels, without the need to stab one’s finger every few hours to test blood.
It was designed for diabetics, especially for those with Type 1 Diabetes, where around-the-clock monitoring is necessary for appropriate insulin dosing.
For non-diabetics, they can be a good way of learning what our body’s response to various foods and activities is like, the better to be able to tweak our habits to avoid undue glucose spikes (which are harmful for our pancreas, liver, heart, brain, kidneys, and more).
How it works: there’s a sensor that sits on the arm (or elsewhere, but the arm is a popular placement) with a little probe that goes under the skin. It’s applied using a device that inserts it automatically using a needle (you only need to press a button, you don’t need to guide the needle yourself); the needle then retracts, leaving the soft, flexible probe in place. Having been attached, that sensor can now stay in place for 2 weeks (usually; depends on brand, but for example FreeStyle Libre, the most popular brand, the sensors last 2 weeks), and yes, it’s fine to bathe/shower/etc with it. When you want an update from your CGM, you scan it with your phone (or you can buy a dedicated reader, but that is more expensive and unnecessary), and it uploads the data since your last scan.
Pros: it’s convenient and gives a lot of data, so even if you only use it for a short period of time (for example, a month) you can get a very good idea of what affects your blood sugar levels and how. Also, because of the constant nature of the monitoring, it helps avoid accidental sample bias of the kind that can occur with manual testing, by testing a little too soon or too late, and missing a spike/dip.
Cons: it can be expensive, depending on where you live and what options are available for you locally, so you might not want to do it long-term (since that would require buying two sensors per month). It’s also, for all its wealth of data, slightly less accurate than fingerprick testing—that’s because it takes an interstitial reading instead of directly from the blood. For this reason, if you test both ways, you may find a discrepancy of about 3mg/dL. Given that the healthy range is about 70–140mg/dL, a discrepancy of 3mg/dL is probably not going to be important, but it is a thing to mention can (and probably will) happen.
Patterns to bear in mind (with any kind of blood sugar monitoring):
- Dawn phenomenon: a natural glucose rise upon waking.
- Exercise-induced spikes (normal due to energy demands).
- Fat in meals slowing glucose absorption.
- Different foods can sometimes cause a double-wave after dinner (because glucose from different foods is absorbed differently, and/or different foods affect insulin response independent of glucose)
- Steep, rapid spikes that are more harmful than gradual, sustained increases.
- Vitamin C spikes: temporary chemical interference with the sensor, not actual glucose rises.
- Nighttime glucose dips (often false readings caused by sleeping position).
For more on all of this, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
10 Ways To Balance Blood Sugars
Take care!
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Can I Eat That? – by Jenefer Roberts
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The answer to the question in the title is: you can eat pretty much anything, if you’re prepared for the consequences!
This book looks to give you the information to make your own decisions in that regard. There’s a large section on the science of glucose metabolism in the context of food (other aspects of glucose metabolism aren’t covered), so you will not simply be told “raw carrots are good; mashed potatoes are bad”, you’ll understand many factors that affect it, e.g:
- Macronutrient profiles of food and resultant base glycemic indices
- How the glycemic index changes if you cut something, crush it, mash it, juice it, etc
- How the glycemic index changes if you chill something, heat it, fry it, boil it, etc
- The many “this food works differently in the presence of this other food” factors
- How your relative level of insulin resistance affects things itself
…and much more.
The style is simple and explanatory, without deep science, but with good science and comprehensive advice.
There are also the promised recipes; they’re in an appendix at the back and aren’t the main meat of the book, though.
Bottom line: if you’ve ever found it confusing working out what works how in the mysterious world of diabetes nutrition, this book is a top tier demystifier.
Click here to check out Can I Eat That?, and gain confidence in your food choices!
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Reading As A Cognitive Exercise
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Reading, Better
It is relatively uncontroversial to say that reading is good for cognitive health, but we don’t like to make claims without science if we can help it, so let’s get started:
There was a 2021 study, which found that even when controlling for many other factors, including highest level of education, socioeconomic status, and generalized pre-morbid intelligence:
❝high reading activity, as defined by almost daily reading, was associated with lower odds of cognitive decline, compared to low reading activity❞
Source: Can reading increase cognitive reserve?
However, not all reading is the same. And this isn’t just about complexity or size of vocabulary, either. It’s about engagement.
And that level of engagement remains the key factor, no matter how quickly or slowly someone reads, as the brain tends to automatically adjust reading speed per complexity, because the brain’s “processing speed” remains the same:
Read more: Cognitive coupling during reading
Everyone’s “processing speed” is different (and is associated with generalized intelligence and executive functions), though as a general rule of thumb, the more we practice it, the faster our processing speed gets. So if you balked at the notion of “generalized intelligence” being a factor, be reassured that this association goes both ways.
So is the key to just read more?
That’s a great first step! But…
The key factor still remains: engagement.
So what does that mean?
It is not just the text that engages you. You must also engage the text!
This is akin to the difference between learning to drive by watching someone else do it, and learning by getting behind the wheel and having a go.
When it comes to reading, it should not be a purely passive thing. Sure, if you are reading a fiction book at bedtime, get lost in it, by all means. But when it comes to non-fiction reading, engage with it actively!
For example, I (your writer here, hi), when reading non-fiction:
- Read at what is generally considered an unusually fast pace, but
- Write so many notes in the margins of physical books, and
- Write so many notes using the “Notes” function on my Kindle
And this isn’t just like a studious student taking notes. Half the time I am…
- objecting to content (disagreeing with the author), or
- at least questioning it, or which is especially important, or
- noting down questions that came to my mind as a result of what I am reading.
This latter is a bit like:
- when you are reading 10almonds, sometimes you will follow our links and go off down a research rabbit-hole of your own, and that’s great!
- sometimes you will disagree with something and write to tell us, and that’s great too (when this happens, one or the other or all of us will learn something, and yes, we have published corrections before now)!
- sometimes what you read here will prompt a further question, and you’ll send that to us, and guess what, also great! We love questions.
Now, if your enjoyment of 10almonds is entirely passive, don’t let us stop you (we know our readers like quick-and-easy knowledge, and that’s good too), it’s just, the more you actively engage with it, the more you’ll get out of it.
This, by the way, was also a lifelong habit of Leonardo da Vinci, which you can read about here:
How to Think Like Leonardo da Vinci: Seven Steps to Genius Every Day – by Michael J. Gelb
a very good book that we reviewed last year
How you read (i.e. what medium) matters too!
Are you reading this on a desktop/laptop, or a mobile device? That difference could matter more than the difference between paper and digital, according to this study from 2020 that found…
❝The cumulation of evidence from this and previous studies suggests that reading on a tablet affords different interactions between the reader and the text than reading on a computer screen.
Reading on a tablet might be more similar to reading on paper, and this may impact the attentional processes during reading❞
What if my mind wanders easily?
You can either go with it, or train to improve focus.
Going with it: just make sure you have more engaging reading to get distracted by. It’s all good.
Training focus: this is trickier, but worthwhile, as executive function (you will remember from earlier) was an important factor too, and training focus is training executive function.
As for one way to do that…
If you’d like a primer for getting going with that, then you may enjoy our previous main feature:
No-Frills, Evidence-Based Mindfulness
Enjoy!
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Fixing Fascia
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Fascia: Why (And How) You Should Take Care Of Yours
Fascia is the web-like layer of connective tissue that divides your muscles and organs from each other. It simultaneously holds some stuff in place, and allows other parts to glide over each other with minimal friction.
At least, that’s what it’s supposed to do.
Like any body part, it can go wrong. More on this later. But first…
A quick note on terms
It may seem like sometimes people say “myofascial” because it sounds fancier, but it does actually have a specific meaning too:
- “Fascia” is what we just described above
- “Myofascial” means “of or relating to muscles and fascia”
For example, “myofascial release” means “stopping the fascia from sticking to the muscle where it shouldn’t” and “myofascial pain” means “pain that has to do with the muscles and fascia”. See also:
Myofascial vs Fascia: When To Use Each One? What To Consider
Why fascia is so ignored
For millennia, it was mostly disregarded as a “neither this nor that” tissue that just happens to be in the body. We didn’t pay attention to it, just like we mostly don’t pay attention to the air around us.
But, much like the air around us, we sure pay attention when something goes wrong with it!
However, even in more recent years, we’ve been held back until quite new developments like musculoskeletal ultrasound that could show us problems with the fascia.
What can go wrong
It’s supposed to be strong, thin, supple, and slippery. It holds on in the necessary places like a spiderweb, but for the most part, it is evolved for minimum friction.
Some things can cause it to thicken and become sticky in the wrong places. Things such as:
- Physical trauma, e.g. an injury or surgery—but we repeat ourselves, because a surgery is an injury! It’s a (usually) necessary injury, but an injury nonetheless.
- Compensation for pain. If a body part hurts for some reason, and your posture changes to accommodate that, doing so can mess up your fascia, and cause you different problems somewhere else entirely.
- This is not witchcraft; think of how, when using a corded vacuum cleaner, sometimes the cord can get snagged on something in the next room and we nearly break something because we expected it to just come with us and it didn’t? It’s like that.
- Repetitive movements (repetitive strain injury is partly a myofascial issue)
- Not enough movement: when it comes to range of motion, it’s “use it or lose it”.
- The human body tries its best to be as efficient as possible for us! So eventually it will go “Hey, I notice you never move more than 30º in this direction, so I’m going to stop making fascia that allows you to go past that point, and I’ll just dump the materials here instead”
“I’ll just dump the materials here instead” is also part of the problem—it creates what we colloquially call “knots”, which are not so much part of the muscle as the fascia that covers it. That’s an actual physical sticky lumpy bit.
What to do about it
Firstly, avoid the above things! But, if for whatever reason something has gone wrong and you now have sticky lumpy fascia that doesn’t let you move the way you’d like (if you have any mobility/flexibility issues that aren’t for another known reason, then this is usually it), there are things can be done:
- Heat—is definitely not a cure-all, but it’s a good first step before doing the other things. A heating pad or a warm bath are great.
- Here’s an example of a neck+back+shoulders heating pad; you can get them for different body parts, or just use an electric blanket!
- Massage—ideally, by someone else who knows what they are doing. Self-massage is possible, as is teaching oneself (there are plenty of video tutorials available), but skilled professional therapeutic myofascial release massage is the gold standard.
- Foam rollers are a great no-skill way to get going with self-massage, whether because that’s what’s available to you, or because you just want something you can do between sessions. Here’s an example of the kind we mean.
- Acupuncture—triggering localized muscular relaxation, an important part of myofascial release, is something acupuncture is good at.
- See also: Pinpointing The Usefulness Of Acupuncture ← noteworthily, the strongest criticism of acupuncture for pain relief is that it performs only slightly better than sham acupuncture, but taken in practical terms, all that really means is “sticking little needles in does work, even if not necessarily by the mechanism acupuncturists believe”
- Calisthenics—Pilates, yoga, and other forms of body movement training can help gradually get one’s fascia to where and how it’s supposed to be.
- This is that “use it or lose it” bodily efficiency we talked about!
Remember, the body is always rebuilding itself. It never stops, until you die. So on any given day, you get to choose whether it rebuilds itself a little bit worse or a little bit better.
Take care!
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