Neurotransmitter Cheatsheet
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Which Neurotransmitter?
There are a lot of neurotransmitters that are important for good mental health (and, by way of knock-on effects, physical health).
However, when pop-science headlines refer to them as “feel-good chemicals” (yes but which one?!) or “the love molecule” (yes but which one?!) or other such vague names when referring to a specific neurotransmitter, it’s easy to get them mixed up.
So today we’re going to do a little disambiguation of some of the main mood-related neurotransmitters (there are many more, but we only have so much room), and what things we can do to help manage them.
Dopamine
This one predominantly regulates reward responses, though it’s also necessary for critical path analysis (e.g. planning), language faculties, and motor functions. It makes us feel happy, motivated, and awake.
To have more:
- eat foods that are rich in dopamine or its precursors such as tyrosine (bananas and almonds are great)
- do things that you find rewarding
Downsides: is instrumental in most addictions, and also too much can result in psychosis. For most people, that level of “too much” isn’t obtainable due to the homeostatic system, however.
See also: Rebalancing Dopamine (Without “Dopamine Fasting”)
Serotonin
This one predominantly helps regulate our circadian rhythm. It also makes us feel happy, calm, and awake.
To have more:
- get more sunlight, or if the light must be artificial, then (ideally) full-spectrum light, or (if it’s what’s available) blue light
- spend time in nature; we are hardwired to feel happy in the environments in which we evolved, which for most of human history was large open grassy expanses with occasional trees (however, for modern purposes, a park or appropriate garden will suffice).
Downsides: this is what keeps us awake at night if we had too much light before bed, and also too much serotonin can result in (potentially fatal) serotonin syndrome. Most people can’t get that much serotonin due to our homeostatic system, but some drugs can force it upon us.
See also: Seasonal Affective Disorder Strategies
Oxytocin
This one predominantly helps us connect to others on an emotional level. It also makes us feel happy, calm, and relaxed.
To have more:
- hug a loved one (or even just think about doing so, if they’re not available)
- look at pictures/videos of cute puppies, kittens, and the like—this triggers a similar response
Downsides: negligible. Socially speaking, it can cause us to drop our guard, most for most people most of the time, this is not a problem. It can also reduce sexual desire—it’s in large part responsible for the peaceful lulled state post-orgasm. It’s not responsible for the sleepiness in men though; that’s mostly prolactin.
See also: Only One Kind Of Relationship Promotes Longevity This Much!
Adrenaline
This one predominantly affects our sympathetic nervous system; it elevates heart rate, blood pressure, and other similar functions. It makes us feel alert, ready for action, and energized.
To have more:
- listen to a “power anthem” piece of music. What it is can depend on your musical tastes; whatever gets you riled up in an empowering way.
- engage in something competitive that you feel strongly about while doing it—or by the same mechanism, a solitary activity where the stakes feel high even if it’s actually quite safe (e.g. watching a thriller or a horror movie, if that’s your thing).
Downsides: its effects are not sustainable, and (in cases of chronic stress) the body will try to sustain them anyway, which has a deleterious effect. Because adrenaline and cortisol are closely linked, chronically high adrenal action will tend to mean chronically high cortisol also.
See also: Lower Your Cortisol! (Here’s Why & How)
Some final words
You’ll notice that in none of the “how to have more” did we mention drugs. That’s because:
- a drug-free approach is generally the best thing to try first, at the very least
- there are simply a lot of drugs to affect each one (or more), and talking about them would require talking about each drug in some detail.
However, the following may be of interest for some readers:
Antidepressants: Personalization Is Key!
Take care!
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Goji Berries: Which Benefits Do They Really Have?
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Are Goji Berries Really A Superfood?
Goji berries are popularly considered a superfood, and sold for everything from anti-aging effects, to exciting benefits* that would get this email directed to your spam folder if we described them.
*We searched so you don’t have to: there doesn’t seem to be much research to back [that claim that we can’t mention], but we did find one paper on its “invigorating” benefits for elderly male rats. We prefer to stick to human studies where we can!
So how does the science stack up for the more mainstream claims?
Antioxidant effects
First and most obvious for this fruit that’s full of helpful polysaccharides, carotenoids, phenolic acids, and flavonoids, yes, they really do have strong antioxidant properties:
Immune benefits
Things that are antioxidant are generally also anti-inflammatory, and often have knock-on benefits for the immune system. That appears to be the case here.
For example, in this small-but-statistically-significant study (n=60) in healthy adults (aged 55–72 years)
❝The GoChi group showed a statistically significant increase in the number of lymphocytes and levels of interleukin-2 and immunoglobulin G compared to pre-intervention and the placebo group, whereas the number of CD4, CD8, and natural killer cells or levels of interleukin-4 and immunoglobulin A were not significantly altered. The placebo group showed no significant changes in any immune measures.
Whereas the GoChi group showed a significant increase in general feelings of well-being, such as fatigue and sleep, and showed a tendency for increased short-term memory and focus between pre- and post-intervention, the placebo group showed no significant positive changes in these measures.❞
“GoChi” here is a brand name for goji berries, and it’s not clear from the abstract whether the company funded the study:
Here’s another study, this time n=150, and ages 65–70 years old. This time it’s with a different brand (“Lacto-Wolfberry”, a milk-with-goji supplement drink) and it’s also unclear whether the company funded the study. However, taking the data at face value:
❝In conclusion, long-term dietary supplementation with Lacto-Wolfberry in elderly subjects enhances their capacity to respond to antigenic challenge without overaffecting their immune system, supporting a contribution to reinforcing immune defense in this population. ❞
In other words: it allowed those who took it to get measurably more benefit from the flu vaccinations that they received, without any ill effects.
Anticancer potential
This one’s less contentious (the immune benefits seemed very credible; we’d just like to see more transparent research to say for sure), so in the more clearly-evidenced case against cancer we’ll just drop a few quick studies, clipped for brevity:
- Goji berry (Lycium barbarum) inhibits the proliferation, adhesion, and migration of oral cancer cells
- A closer look at immunomodulatory properties of goji berries extract in human colon cancer cells
- Lycium barbarum polysaccharides induce apoptosis in human prostate cancer cells and inhibits prostate cancer growth
- Identification of goji berry cyclic peptides and anticervical carcinoma activity
- Antiproliferative effects of Lycium barbarum’s (goji berry) fractions on breast cancer Cell Lines
You get the idea: it helps!
Bonus benefit for the eyes
Goji berries also help against age-related macular degeneration. The research for this is in large part secondary, i.e. goji berries contain things x, y, and z, and then separate studies say that those things help against age-related macular degeneration.
We did find some goji-specific studies though! One of them was for our old friends the “Lacto-Wolfberry” people and again, wasn’t very transparent, so we’ll not take up extra time/space with that one here.
Instead, here’s a much clearer, transparent, and well-referenced study with no conflicts of interest, that found:
❝Overall, daily supplementation with Goji berry for 90d improves MPOD by increasing serum Z levels rather than serum L levels in early AMD patients. Goji berry may be an effective therapeutic intervention for preventing the progression of early AMD.❞
- MPOD = Macular Pigment Optical Density, a standard diagnostic tool for age-related macular degeneration
- AMD = Age-related Macular Degeneration
(that whole paper is very compelling reading, if you have time)
If you want a quicker read, we offer:
How To Avoid Age-Related Macular Degeneration
and also…
Where to get goji berries?
You can probably find them at your local health food store, if not the supermarket. However, if you’d like to buy them online, here’s an example product on Amazon for your convenience
Enjoy!
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Ideal Blood Pressure Numbers Explained
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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
❝Maybe I missed it but the study on blood pressure did it say what the 2 numbers should read ideally?❞
We linked it at the top of the article rather than including it inline, as we were short on space (and there was a chart rather than a “these two numbers” quick answer), but we have a little more space today, so:
Category Systolic (mm Hg) Diastolic (mm Hg) Normal < 120 AND < 80 Elevated 120 – 129 AND < 80 Stage 1 – High Blood Pressure 130 – 139 OR 80 – 89 Stage 2 – High Blood Pressure 140 or higher OR 90 or higher Hypertensive Crisis Above 180 AND/OR Above 120 To oversimplify for a “these two numbers” answer, under 120/80 is generally considered good, unless it is under 90/60, in which case that becomes hypotension.
Hypotension, the blood pressure being too low, means your organs may not get enough oxygen and if they don’t, they will start shutting down.
To give you an idea how serious this, this is the closed-circuit equivalent of the hypovolemic shock that occurs when someone is bleeding out onto the floor. Technically, bleeding to death also results in low blood pressure, of course, hence the similarity.
So: just a little under 120/80 is great.
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Pasteurization: What It Does And Doesn’t Do
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Pasteurization’s Effect On Risks & Nutrients
In Wednesday’s newsletter, we asked you for your health-related opinions of raw (cow’s) milk, and got the above-depicted, below-described, set of responses:
- About 47% said “raw milk is dangerous to consume, whereas pasteurization makes it safer”
- About 31% said “raw milk is a good source of vital nutrients which pasteurization would destroy”
- About 14% said “both raw milk and pasteurized milk are equally unhealthy”
- About 9% said “both raw milk and pasteurized milk are equally healthy”
Quite polarizing! So, what does the science say?
“Raw milk is dangerous to consume, whereas pasteurization makes it safer: True or False?”
True! Coincidentally, the 47% who voted for this are mirrored by the 47% of the general US population in a similar poll, deciding between the options of whether raw milk is less safe to drink (47%), just as safe to drink (15%), safer to drink (9%), or not sure (30%):
Public Fails to Appreciate Risk of Consuming Raw Milk, Survey Finds
As for what those risks are, by the way, unpasteurized dairy products are estimated to cause 840x more illness and 45x more hospitalizations than pasteurized products.
This is because unpasteurized milk can (and often does) contain E. coli, Listeria, Salmonella, Cryptosporidium, and other such unpleasantries, which pasteurization kills.
Source for both of the above claims:
(we know the title sounds vague, but all this information is easily visible in the abstract, specifically, the first two paragraphs)
Raw milk is a good source of vital nutrients which pasteurization would destroy: True or False?
False! Whether it’s a “good” source can be debated depending on other factors (e.g., if we considered milk’s inflammatory qualities against its positive nutritional content), but it’s undeniably a rich source. However, pasteurization doesn’t destroy or damage those nutrients.
Incidentally, in the same survey we linked up top, 16% of the general US public believed that pasteurization destroys nutrients, while 41% were not sure (and 43% knew that it doesn’t).
Note: for our confidence here, we are skipping over studies published by, for example, dairy farming lobbies and so forth. Those do agree, by the way, but nevertheless we like sources to be as unbiased as possible. The FDA, which is not completely unbiased, has produced a good list of references for this, about half of which we would consider biased, and half unbiased; the clue is generally in the journal names. For example, Food Chemistry and the Journal of Food Science and Journal of Nutrition are probably less biased than the International Dairy Association and the Journal of Dairy Science:
FDA | Raw Milk Misconceptions and the Danger of Raw Milk Consumption
this page covers a lot of other myths too, more than we have room to “bust” here, but it’s very interesting reading and we recommend to check it out!
Notably, we also weren’t able to find any refutation by counterexample on PubMed, with the very slight exception that some studies sometimes found that in the case of milks that were of low quality, pasteurization can reduce the vitamin E content while increasing the vitamin A content. For most milks however, no significant change was found, and in all cases we looked at, B-vitamins were comparable and vitamin D, popularly touted as a benefit of cow’s milk, is actually added later in any case. And, importantly, because this is a common argument, no change in lipid profiles appears to be findable either.
In science, when something has been well-studied and there aren’t clear refutations by counterexample, and the weight of evidence is clearly very much tipped into one camp, that usually means that camp has it right.
Milk generally is good/bad for the health: True or False?
True or False, depending on what we want to look at. It’s definitely not good for inflammation, but the whole it seems to be cancer-neutral and only increases heart disease risk very slightly:
- Keep Inflammation At Bay ← short version is milk is bad, fermented milk products are fine in moderation
- Is Dairy Scary? ← short version is that milk is neither good nor terrible; fermented dairy products however are health-positive in numerous ways when consumed in moderation
You may be wondering…
…how this goes for the safety of dairy products when it comes to the bird flu currently affecting dairy cows, and the good news is, the heat of pasteurization kills it:
With all this bird flu around, how safe are eggs, chicken or milk?
Take care!
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Retrain Your Brain – by Dr. Seth Gillihan
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15-Minute Arabic”, “Sharpen Your Chess Tactics in 24 Hours”, “Change Your Life in 7 Days”, “Cognitive Behavioral Therapy in 7 weeks”—all real books from this reviewer’s shelves.
The thing with books with these sorts of time periods in the titles is that the time period in the title often bears little relation to how long it takes to get through the book. So what’s the case here?
You’ll probably get through it in more like 7 days, but the pacing is more important than the pace. By that we mean:
Dr. Gillihan starts by assuming the reader is at best “in a rut”, and needs to first pick a direction to head in (the first “week”) and then start getting one’s life on track (the second “week”).
He then gives us, one by one, an array of tools and power-ups to do increasingly better. These tools aren’t just CBT, though of course that features prominently. There’s also mindfulness exercises, and holistic / somatic therapy too, for a real “bringing it all together” feel.
And that’s where this book excels—at no point is the reader left adrift with potential stumbling-blocks left unexamined. It’s a “whole course”.
Bottom line: whether it takes you 7 hours or 7 months, “Cognitive Behavioral Therapy in 7 Weeks” is a CBT-and-more course for people who like courses to work through. It’ll get you where you’re going… Wherever you want that to be for you!
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How Jumping Rope Changes The Human Body
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Most popularly enjoyed by professional boxers and six-year-old girls, jumping rope is one of the most metabolism-boosting exercises around:
Just a hop, skip, and a jump away from good health
Maybe you haven’t tried it since your age was in single digits, so, if you do…
What benefits can you expect?
- Improves cardiovascular fitness, equivalent to 30 minutes of running with just 10 minutes of jumping.
- Increases bone density and boosts immunity by aiding the lymphatic system.
- Enhances explosiveness in the lower body, agility, and stamina.
- Improves shoulder endurance, coordination, and spatial awareness.
What kind of rope is best for you?
- Beginner ropes: licorice ropes (nylon/vinyl), beaded ropes for rhythm and durability.
- Advanced ropes: speed ropes (denser, faster materials) for higher speeds and more difficult skills.
- Weighted ropes: build upper body muscles (forearms, shoulders, chest, back).
What length should you get?
- Recommended rope length varies by height (8 ft for 5’0″–5’4″, 9 ft for 5’5″–5’11”, 10 ft for 6’0″ and above).
- Beginners should start with longer ropes for clearance.
What should you learn?
- Initial jump rope skills: start with manageable daily jump totals, gradually increasing as ankles, calves, and feet adapt.
- Further skills: learn the two-foot jump and then the boxer’s skip for efficient, longer sessions and advanced skills. Keep arms close and hands at waist level for a smooth swing.
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:
How To Do High Intensity Interval Training (Without Wrecking Your Body)
Take care!
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The Best Menopause Advice You Don’t Want To Hear About
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Nutritionist and perimenopause coach Claudia Canu, whom we’ve featured before in our Expert Insights segment, has advice:
Here’s to good health
When it comes to alcohol, the advice is: don’t.
Or at least, cut back, and manage the effects by ensuring good hydration, having an “alcohol curfew” and so forth.
What’s the relation to menopause? Well, alcohol’s not good for anyone at any time of life, but there are some special considerations when it comes to alcohol and estrogenic hormonal health:
- The liver works hard to process the alcohol as a matter of urgency, delaying estrogen processing, which can increase the risk of breast and uterine cancer.
- Alcohol has no positive health effects and is also linked to higher risks of breast and colorectal cancer.
- Alcohol can also trigger some menopausal symptoms, such as night sweats and hot flashes. So, maybe reaching for that “cooling drink” isn’t the remedy it might seem.
- During menopause, the body becomes more insulin-resistant, making it more susceptible to blood sugar spikes caused by alcohol. Also not good.
Common reasons women turn to alcohol include stress, frustration, the need for reward, and social pressure, and all of these can be heightened when undergoing hormonal changes. Yet, alcohol will ultimately only worsen each of those things.
For more on the science of some of the above, plus tips on how to make positive changes with minimum discomfort, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
- How To Reduce Or Quit Alcohol
- How To Reduce The Harm Of Drinking (Without Abstaining)
- Where Nutrition Meets Habits! ← our “Expert Insights” spotlight on Canu
- How To Reduce Your Alzheimer’s Risk Early ← particularly important at this life stage
Take care!
Don’t Forget…
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