The Dopamine Myth
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The Dopamine Myth
There’s a popular misconception that, since dopamine is heavily involved in addictions, it’s the cause.
We see this most often in the context of non-chemical addictions, such as:
- gambling
- videogames
- social media
And yes, those things will promote dopamine production, and yes, that will feel good. But dopamine isn’t the problem.
Myth: The Dopamine Detox
There’s a trend we’ve mentioned before (it got a video segment a few Fridays back) about the idea of a “dopamine detox“, and how unscientific the idea is.
For a start…
- You cannot detox from dopamine, because dopamine is not a toxin
- You cannot abstain from dopamine, because your brain regulates your dopamine levels to keep them correct*
- If you could abstain from dopamine (and did), you would die, horribly.
*unless you have a serious mental illness, for example:
- forms of schizophrenia and/or psychosis that involve too much dopamine, or
- forms of depression and/or neurodegenerative diseases such as Parkinson’s (and several kinds of dementia) in which you have too little dopamine
- bipolar disorder in which dopamine levels can swing too far each way
See also: Dopamine fasting: misunderstanding science spawns a maladaptive fad
Myth: Dopamine is all about pleasure
Dopamine is a pleasure-giving neurotransmitter, but it serves more purposes than that! It also plays a central role in many neurological processes, including:
- Motivation
- Learning and memory
- Motor functions
- Language faculties
- Linear task processing
Note for example how someone taking dopaminergic drugs (prescription or otherwise; could be anything from modafinil to cocaine) is not blissed out… They’re probably in a good mood, sure, but they’re focused, organized, quick-thinking, and so forth! This is not an ad for cocaine; cocaine is very bad for the health. But you see the features? So, what if we could have a little more dopamine… healthily?
Dopamine—à la carte
Let’s look at the examples we gave earlier of non-chemical addictions that are dopaminergic in nature:
- gambling
- videogames
- social media
They’re not actually that rewarding, are they?
- Gamblers lose more than they win
- Gamers cease to care about a game once they have won
- Social media more often results in “doomscrolling”
This is because what prompts the most dopamine is actually the anticipation of reward… not the thing itself, whose reward-pleasure is very fleeting. Nobody looks back at an hour of doomscrolling and thinks “well, that was fun; I’m glad I did that”.
See the science: Liking, Wanting and the Incentive-Sensitization Theory of Addiction
But what if we anticipated a reward from things that are not deleterious to health and productivity? Things that are neutral, or even good for us?
Examples of this include:
- Sex! (remember though, it’s not a race to the finish-line)
- Good, nourishing food (bonus: some foods boost dopamine production nutritionally)
- Exercise/sport (also prompts release of endorphins, win/win!)
- Gamified learning apps (e.g. Duolingo)
- Gamified health/productivity apps (anything with bells and whistles and things that go “ding” and measure streaks etc)
Want to know more?
That’s all we have time for today, but you might want to check out:
10 Best Ways to Increase Dopamine Levels Naturally ← Science-based and well-sourced article!
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Managing Sibling Relationships In Adult Life
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Managing Sibling Relationships In Adult Life
After our previous main feature on estrangement, a subscriber wrote to say:
❝Parent and adult child relationships are so important to maintain as you age, but what about sibling relationships? Adult choices to accept and move on with healthier boundaries is also key for maintaining familial ties.❞
And, this is indeed critical for many of us, if we have siblings!
Writer’s note: I don’t have siblings, but I do happen to have one of Canada’s top psychologists on speed-dial, and she has more knowledge about sibling relationships than I do, not to mention a lifetime of experience both personally and professionally. So, I sought her advice, and she gave me a lot to work with.
Today I bring her ideas, distilled into my writing, for 10almonds’ signature super-digestible bitesize style.
A foundation of support
Starting at the beginning of a sibling story… Sibling relationships are generally beneficial from the get-go.
This is for reasons of mutual support, and an “always there” social presence.
Of course, how positive this experience is may depend on there being a lack of parental favoritism. And certainly, sibling rivalries and conflict can occur at any age, but the stakes are usually lower, early in life.
Growing warmer or colder
Generally speaking, as people age, sibling relationships likely get warmer and less conflictual.
Why? Simply put, we mature and (hopefully!) get more emotionally stable as we go.
However, two things can throw a wrench into the works:
- Long-term rivalries or jealousies (e.g., “who has done better in life”)
- Perceptions of unequal contribution to the family
These can take various forms, but for example if one sibling earns (or otherwise has) much more or much less than another, that can cause resentment on either or both sides:
- Resentment from the side of the sibling with less money: “I’d look after them if our situations were reversed; they can solve my problems easily; why do they resent that and/or ignore my plight?”
- Resentment from the side of the sibling with more money: “I shouldn’t be having to look after my sibling at this age”
It’s ugly and unpleasant. Same goes if the general job of caring for an elderly parent (or parents) falls mostly or entirely on one sibling. This can happen because of being geographically closer or having more time (well… having had more time. Now they don’t, it’s being used for care!).
It can also happen because of being female—daughters are more commonly expected to provide familial support than sons.
And of course, that only gets exacerbated as end-of-life decisions become relevant with regard to parents, and tough decisions may need to be made. And, that’s before looking at conflicts around inheritance.
So, all that seems quite bleak, but it doesn’t have to be like that.
Practical advice
As siblings age, working on communication about feelings is key to keeping siblings close and not devolving into conflict.
Those problems we talked about are far from unique to any set of siblings—they’re just more visible when it’s our own family, that’s all.
So: nothing to be ashamed of, or feel bad about. Just, something to manage—together.
Figure out what everyone involved wants/needs, put them all on the table, and figure out how to:
- Make sure outright needs are met first
- Try to address wants next, where possible
Remember, that if you feel more is being asked of you than you can give (in terms of time, energy, money, whatever), then this discussion is a time to bring that up, and ask for support, e.g.:
“In order to be able to do that, I would need… [description of support]; can you help with that?”
(it might even sometimes be necessary to simply say “No, I can’t do that. Let’s look to see how else we can deal with this” and look for other solutions, brainstorming together)
Some back-and-forth open discussion and even negotiation might be necessary, but it’s so much better than seething quietly from a distance.
The goal here is an outcome where everyone’s needs are met—thus leveraging the biggest strength of having siblings in the first place:
Mutual support, while still being one’s own person. Or, as this writer’s psychology professor friend put it:
❝Circling back to your original intention, this whole discussion adds up to: siblings can be very good or very bad for your life, depending on tons of things that we talked about, especially communication skills, emotional wellness of each person, and the complexity of challenges they face interdependently.❞
Our previous main feature about good communication can help a lot:
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Is Dairy Scary?
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Is Dairy Scary?
Milk and milk products are popularly enjoyed as a good source of calcium and vitamin D.
In contrast, critics of dairy products (for medical reasons, rather than ethical, which is another matter entirely and beyond the scope of this article) point to risks of cancer, heart disease, and—counterintuitively—osteoporosis. We’ll focus more on the former, but touch on the latter two before closing.
Dairy & Cancer
Evidence is highly conflicting. There are so many studies with so many different results. This is partially explicable by noting that not only is cancer a many-headed beast that comes in more than a hundred different forms and all or any of them may be affected one way or another by a given dietary element, but also… Not all milk is created equal, either!
Joanna Lampe, of the Public Health Sciences division, Fred Hutchinson Cancer Research Center in Seattle, writes:
❝Dairy products are a complex group of foods and composition varies by region, which makes evaluation of their association with disease risk difficult. For most cancers, associations between cancer risk and intake of milk and dairy products have been examined only in a small number of cohort studies, and data are inconsistent or lacking❞
In her systematic review of studies, she noted, for example, that:
- Milk and dairy products contain micronutrients and several bioactive constituents that may influence cancer risk and progression
- There’s probable association between milk intake and lower risk of colorectal cancer
- There’s a probable association between diets high in calcium and increased risk of prostate cancer
- Some studies show an inverse association between intake of cultured dairy products and bladder cancer (i.e., if you eat yogurt you’re less likely to get bladder cancer)
Since that systemic review was undertaken, more research has been conducted, and the results are… Not conclusive, but converging towards a conclusion:
- Dairy products can increase or decrease cancer risk
- The increase in cancer risk seems strongest when milk is consumed in quantities that result in too much calcium. When it comes to calcium, you can absolutely have too much of a good thing—just ask your arteries!
- The decrease in cancer seems to be mostly, if not exclusively, from fermented dairy products. This usually means yogurts. The benefit here is not from the milk itself, but rather from the gut-friendly bacteria.
You may be wondering: “Hardened arteries, gut microbiome health? I thought we were talking about cancer?” and yes we are. No part of your health is an island unrelated to other parts of your health. One thing can lead to another. Sometimes we know how and why, sometimes we don’t, but it’s best to not ignore the data.
The bottom line on dairy products and cancer is:
- Consuming dairy products in general is probably fine
- Yogurt, specifically, is probably beneficial
Dairy and Heart Disease
The reason for the concern is clear enough: it’s largely assumed to be a matter of saturated fat intake.
The best combination of “large” and “recent” that we found was a three-cohort longitudinal study in 2019, which pretty much confirms what was found in smaller or less recent studies:
- There is some evidence to suggest that consumption of dairy can increase all-cause mortality in general, and death from (cancer and) cardiovascular disease in particular
- The evidence is not, however, overwhelming. It is marginal.
Dairy and Osteoporosis
Does dairy cause osteoporosis? Research here tends to fall into one of two categories when it comes to conclusions, so we’ll give an example of each:
- “Results are conflicting, saying yes/no/maybe, and basically we just don’t know”
- “Results are conflicting, but look: cross-sectional and case-control studies say yes; cohort studies say maybe or no; we prefer the cohort studies”
See them for yourself:
- Osteoporosis: Is milk a kindness or a curse?
- Consumption of milk and dairy products and risk of osteoporosis and hip fracture
Conclusion: really, the jury is very much still out on this one
Summary:
- Moderate consumption of dairy products is almost certainly fine
- More specifically: it probably has some (small) pros and some (small) cons
- Yogurt is almost certainly healthier than other dairy products, and is almost universally considered a healthy food (assuming not being full of added sugar etc, of course)
- If you’re going to have non-dairy alternatives to milk, choose wisely!
That’s all we have time for today, but perhaps in a future edition we’ll do a run-down of the pros and cons of various dairy alternatives!
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Which Gadgets Help, & Which Are A Waste Of Time?
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It’s Q&A Day at 10almonds!
Have a question or a request? We love to hear from you!
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 a 67- year old yoga teacher and runner. A lifelong runner, I started long distance running when I was 58. One of my friends loves rucking? I recently bought a rucking vest. Your thoughts? Any risks?
As a perk of my yoga instructor job I get cryotherapy, red light therapy, infrared sauna, and Normatec boots for a nominal fee. Even though they are almost free, I don’t take advantage of them as I can’t find evidence of their value and don’t want to waste my time. Do you recommend any of them?❞On rucking and rucking vests
First, for any unfamiliar, this is about walking/running/exercising in general, with a weighted backpack or weight vest.
As for whether this is beneficial, it depends on your goals. Once upon a very long time ago when this writer was a soldier, it was vitally important to for me be able to [fall from the sky and then] run about 2km carrying a certain (hefty) amount of weight and still be able to fight at the other end of it, or else I would die. Thus, between deployments, I’d often carry a sturdy rucksack with concrete slabs in it, to keep myself accustomed to that burden (funny story: someone once tried to steal that when I had put it down while doing something—the would-be thief fell over instantly and then ran away empty-handed). And, here’s the thing: this kind of training did for me what I needed it to do for me. As a 67-year-old yoga teacher, your needs are probably very different.
A common reason to use weight vests is in an effort against osteoporosis, but the evidence is lacking (or very weak, at best), as we wrote about a while back:
Weight Vests Against Osteoporosis: Do They Really Build Bone?
With regard to risks… Let’s put it this way: my old regiment, in addition to the usual soldierly problems like hearing damage and PTSD, has quite a reputation for producing veterans with spinal compression injuries. And that’s entirely because of the whole “running with a large amount of weight strapped to us” thing. So, you probably don’t want that.
If you are going to do that though, then:
- a weight best is a lot better than a backpack (better distribution of weight)
- start with low weight and work up, and don’t push your limits
We’re not the boss of you, so by all means do as you see fit, but unless there’s a special reason why being able to run with a heavy weight is important to you, then running with a light weight is already more than good enough.
About those job perks
Again, of course, it depends on what you hope to get out of them, but in some cases there is a lot of evidence for benefit.
On cryotherapy: Ice Baths: To Dip Or Not To Dip? ← there are definite benefits for most people!
On red light therapy: Red Light, Go! Casting Yourself In A Healthier Light ← there are some caveats re people who should not do this or at least should be very wary, but for most people, this does a lot of good, and is very well-evidenced to be beneficial
On infrared saunas: we’re unaware of any special evidence in favor of these. However, traditional saunas have plenty of well-evidenced benefits: Saunas: Health Benefits (& Caveats)
On Normatec boots: for the unfamiliar, this is a brand name for compression technology. Again, it depends on what you want to get out of it, though. If you are in good health, then what it’s generally being advertised for is to prevent/reduce exercise-induced muscle damage caused by the stress that endurance training can place on skeletal muscle. Just one problem—it doesn’t seem to work:
❝Athletes attempt to aid their recovery in various ways, one of which is through compression. Dynamic compression consists of intermittent pneumatic compression (IPC) devices, such as the NormaTec Recovery System and Recovery Pump
Clinical Question: What are the effects of IPC on the reduction of Exercise-Induced Muscle Damage (EIMD) in endurance athletes following prolonged exercise? Summary of Key Findings: The current literature was searched to identify the effects of IPC, and 3 studies were selected: 2 randomized controlled trials and 1 randomized cross-over study. Two studies investigated the effect of IPC on delayed onset muscle soreness and plasma creatine kinase in ultramarathoners. The other looked at the impact of IPC on delayed onset muscle soreness in marathoners, ultramarathoners, triathletes, and cyclists.
All studies concluded IPC was not an effective means of improving the reduction of EIMD in endurance-trained athletes.❞
However! If you have lipedema and/or lymphedema and want to manage that, then compression gear may help:
Take care!
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The Mental Health Dangers Of Oversharing
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Oversharers can be fun and amiable; the life of the party. In and of itself, this something that can be considered “pro-social” and thus healthy.
But the problem for one’s mental health in the long-run lies in the “over” part of oversharing. Sometimes, if not checking in with the other person’s comfort, oversharing can be “trauma-dumping”, and push people away. Alternatively, if the oversharing exposes an unmet need, it can make the other person feel obliged to try to help in some fashion, which in the long run may also cause awkwardness and withdrawal.
Some potential problems are purely internal, such the feelings of shame or anxiety that can come afterwards; “I should not have been so vulnerable”, “What if my friends think badly of me now?”, etc.
And of course, sometimes those fears are then validated by reality, if “friends” indeed take advantage of that, or withdraw their friendship. That’s a minority occurrence, but it doesn’t make it any less of a crushing thing if it happens.
Sometimes people overshare because of being a bad judge of what’s a socially-approved appropriate amount of sharing; sometimes people overshare out of a need for closeness, and perhaps the hope of hearing what one needed to hear previously.
The dangers of oversharing don’t mean that we should never speak about our experiences and feelings; in fact sometimes, it is the most healthy thing to do—be it because it’s something that needs communicating to a specific person, or because it’s something we just need to “get off our chest”.
In short, it can be good to share! It can also be good to do so judiciously, by conscious decision and not in response to a spur-of-the-moment impulse, and remember to prioritize our own safety.
Below, Alain de Botton explains more of the psychodynamics of this:
Click Here If The Embedded Video Doesn’t Load Automatically!
10almonds tip, not included in the video: unsure whether your urge to share is too impulsive or not? Write a letter/email, and wait until the next day to decide whether or not to send it.
Want to read more?
Check out:
Breathe; Don’t Vent (At Least In The Moment)
Take care!
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Stop The World…
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Some news highlights from this week:
“US vs Them”?
With the US now set to lose its WHO membership, what does that mean for Americans? For most, the consequences will be indirect:
- the nation’s scientists and institutions will be somewhat “left out in the cold” when it comes to international scientific collaboration in the field of health
- the US will no longer enjoy a position of influence and power within the WHO, which organization’s reports and position statements have a lot of sway over the world’s health practices
Are there any benefits (of leaving the WHO) for Americans? Yes, there is one: the US will no longer be paying into the WHO’s budget, which means:
- the US will save the 0.006% of the Federal budget that it was paying into the WHO annually
- for the average American’s monthly budget, that means (if the saving is passed on) you’ll have an extra dime
However, since US scientific institutions will still need access to international data, likely that access will need to be paid separately, at a higher rate than US membership in WHO cost.
In short: it seems likely to go the way that Brexit did: “saving” on membership fees and then paying more for access to less.
Why is the US leaving again? The stated reasons were mainly twofold:
- the cost of US membership (the US’s contribution constituted 15% of the the overall WHO budget)
- holding the US’s disproportionately high COVID death rate (especially compared to countries such as China) to be a case of WHO mismanagement
Read in full: What losing WHO membership means for the U.S.
Related: What Would a Second Trump Presidency Look Like for Health Care? ← this was a speculative post by KFF Health News, last year
Halt, You’re Under A Breast
More seriously, this is about halting the metastasis of cancerous tumors in the breast. It is reasonable to expect the same principle and thus treatment may apply to other cancers too, but this is where the research is at for now (breast cancer research gets a lot of funding).
And, what principle and treatment is this, you ask? It’s about the foxglove-derived drug digoxin, and how it stops cancerous cells from forming clusters, and even actively dissolves clusters that have already formed. No clusters means no new tumors, which means no metastasis. No metastasis, in turn, means the cancer becomes much more treatable because it’s no longer a game of whack-a-mole; instead of spreading to other places, it’s a much more manageable case of “here’s the tumor, now let’s kill it with something”.
Note: yes, that does mean the tumor still needs killing by some other means—digoxin won’t do that, it “just” stops it from spreading while treatment is undertaken.
Read in full: Proof-of-concept study dissolves clusters of breast cancer cells to prevent metastases
Related: The Hormone Therapy That Reduces Breast Cancer Risk & More
Force Of Habit
“It takes 21 days to make a habit”, says popular lore. Popular is not, however, evidence-based:
❝This systematic review of 20 studies involving 2601 participants challenges the prevailing notion of rapid habit formation, revealing that health-related habits typically require 2–5 months to develop, with substantial individual variability ranging from 4 to 335 days. The meta-analysis demonstrated significant improvements in habit scores across various health behaviours, with key determinants including morning practices, personal choice, and behavioural characteristics❞
So, this is not a lottery, “maybe it will take until Tuesday, maybe it will take nearly a year”, so much as “there are important factors that seriously change how long a habit takes to become engrained, and here is what those factors are”.
Read in full: Study reveals healthy habits take longer than 21 days to set in
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The Teenage Brain – by Dr. Frances Jensen
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We realize that we probably have more grandparents of teenagers than parents of teenagers here, but most of us have at least some teenage relative(s). Which makes this book interesting.
There are a lot of myths about the teenage brain, and a lot of popular assumptions that usually have some basis in fact but are often misleading.
Dr. Jensen gives us a strong foundational grounding in the neurophysiology of adolescence, from the obvious-but-often-unclear (such as the role of hormones) to less-known things like the teenage brain’s general lack of myelination. Not just “heightened neuroplasticity” but, if you imagine the brain as an electrical machine, then think of myelin as the insulation between the wires. Little wonder some wires may get crossed sometimes!
She also talks about such things as the teenage circadian rhythm’s innate differences, the impact of success and failure on the brain, and harder topics such as addiction—and the adolescent cortisol functions that can lead to teenagers needing to seek something to relax in the first place.
In criticism, we can only say that sometimes the author makes sweeping generalizations without acknowledging such, but that doesn’t detract from what she has to say on the topic of neurophysiology.
Bottom line: if there’s a teenager in your life whose behavior and/or moods are sometimes baffling to you, and whose mysteries you’d like to unravel, this is a great book.
Click here to check out the Teenage Brain, and better understand those around you!
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