Ikigai – by Héctor García and Francesc Miralles
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Ikigai is the Japanese term for what in English we often call “raison d’être”… in French, because English is like that.
But in other words: ikigai is one’s purpose in life, one’s reason for living.
The authors of this work spend some chapters extolling the virtues of finding one’s ikigai, and the health benefits that doing so can convey. It is, quite clearly, an important and relevant factor.
The rest of the book goes beyond that, though, and takes a holistic look at why (and how) healthy longevity is enjoyed by:
- Japanese people in general,
- Okinawans in particular,
- Residents of Okinawa’s “blue zone” village with the highest percentage of supercentenarians, most of all.
Covering considerations from ikigai to diet to small daily habits to attitudes to life, we’re essentially looking at a blueprint for healthy longevity.
For a book whose title and cover suggests a philosophy-heavy content, there’s a lot of science in here too, by the way! From microbiology to psychiatry to nutrition science to cancer research, this book covers all bases.
In short: this book gives a lot of good science-based suggestions for adjustments we can make to our lives, without moving to an Okinawan village!
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Relationships: When To Stick It Out & When To Call It Quits
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Like A Ship Loves An Anchor?
Today’s article may seem a little bit of a downer to start with, but don’t worry, it picks up again too. Simply put, we’ve written before about many of the good parts of relationships, e.g:
Only One Kind Of Relationship Promotes Longevity This Much!
…but what if that’s not what we have?
Note: if you have a very happy, secure, fulfilling, joyous relationship, then, great! Or if you’re single and happy, then, also great! Hopefully you will still find today’s feature of use if you find yourself advising a friend or family member one day. So without further ado, let’s get to it…
You may be familiar with the “sunk cost fallacy”; if not: it’s what happens when a person or group has already invested into a given thing, such that even though the thing is not going at all the way they hoped, they now want to continue trying to make that thing work, lest their previous investment be lost. But the truth is: if it’s not going to work, then the initial investment is already lost, and pouring out extra won’t help—it’ll just lose more.
That “investment” in a given thing could be money, time, energy, or (often the case) a combination of the above.
In the field of romance, the “sunk cost fallacy” keeps a lot of bad relationships going for longer than perhaps they should, and looking back (perhaps after a short adjustment period), the newly-single person says “why did I let that go on?” and vows to not make the same mistake again.
But that prompts the question: how can we know when it’s right to “keep working on it, because relationships do involve work”, as perfectly reasonable relationship advice often goes, and when it’s right to call it quits?
Should I stay or should I go?
Some questions for you (or perhaps a friend you might find yourself advising) to consider:
- What qualities do you consider the most important for a partner to have—and does your partner have them?
- If you described the worst of your relationship to a close friend, would that friend feel bad for you?
- Do you miss your partner when they’re away, or are you glad of the break? When they return, are they still glad to see you?
- If you weren’t already in this relationship, would you seek to enter it now? (This takes away sunk cost and allows a more neutral assessment)
- Do you feel completely safe with your partner (emotionally as well as physically), or must you tread carefully to avoid conflict?
- If your partner decided tomorrow that they didn’t want to be with you anymore and left, would that be just a heartbreak, or an exciting beginning of a new chapter in your life?
- What things would you generally consider dealbreakers in a relationship—and has your partner done any of them?
The last one can be surprising, by the way. We often see or hear of other people’s adverse relationship situations and think “I would never allow…” yet when we are in a relationship and in love, there’s a good chance that we might indeed allow—or rather, excuse, overlook, and forgive.
And, patience and forgiveness certainly aren’t inherently bad traits to have—it’s just good to deploy them consciously, and not merely be a doormat.
Either way, reflect (or advise your friend/family member to reflect, as applicable) on the “score” from the above questions.
- If the score is good, then maybe it really is just a rough patch, and the tools we link at the top and bottom of this article might help.
- If the score is bad, the relationship is bad, and no amount of historic love or miles clocked up together will change that. Sometimes it’s not even anyone’s fault; sometimes a relationship just ran its course, and now it’s time to accept that and turn to a new chapter.
“At my age…”
As we get older, it’s easy for that sunk cost fallacy to loom large. Inertia is heavy, the mutual entanglement of lives is far-reaching, and we might not feel we have the same energy for dating that we did when we were younger.
And there may sometimes be a statistical argument for “sticking it out” at least for a while, depending on where we are in the relationship, per this study (with 165,039 participants aged 20–76), which found:
❝Results on mean levels indicated that relationship satisfaction decreased from age 20 to 40, reached a low point at age 40, then increased until age 65, and plateaued in late adulthood.
As regards the metric of relationship duration, relationship satisfaction decreased during the first 10 years of the relationship, reached a low point at 10 years, increased until 20 years, and then decreased again.❞
Source: Development of Relationship Satisfaction Across the Life Span: A Systematic Review and Meta-Analysis
And yet, when it comes to prospects for a new relationship…
- If our remaining life is growing shorter, then it’s definitely too short to spend in an unhappy relationship
- Maybe we really won’t find romance again… And maybe that’s ok, if w’re comfortable making our peace with that and finding joy in the rest of life (this widowed writer (hi, it’s me) plans to remain single now by preference, and her life is very full of purpose and beauty and joy and yes, even love—for family, friends, etc, plus the memory of my wonderful late beloved)
- Nevertheless, the simple fact is: many people do find what they go on to describe as their best relationship yet, late in life ← this study is with a small sample size, but in this case, even anecdotal evidence seems sufficient to make the claim reasonable; probably you personally know someone who has done so. If they can, so can you, if you so wish.
- Adding on to that last point… Later life relationships can also offer numerous significant advantages unique to such (albeit some different challenges too—but with the right person, those challenges are just a fun thing to tackle together). See for example:
An exploratory investigation into dating among later‐life women
And about those later-life relationships that do work? They look like this:
this one looks like the title says it all, but it really doesn’t, and it’s very much worth at least reading the abstract, if not the entire paper—because it talks a lot about the characteristics that make for happy or unhappy relationships, and the effect that those things have on people. It really is very good, and quite an easy read.
See again: Healthy Relationship, Healthy Life
Take care!
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The Lymphatic System Against Cancer & More
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Ask Not What Your Lymphatic System Can Do For You…
Just kidding; we’ll cover that first, as it’s definitely not talked about enough.
The lymphatic system is the system in the body that moves lymph around. It’s made of glands, nodes, and vessels:
- The glands (such as the tonsils and the adenoids) and nodes filter out bacteria and produce white blood cells. Specific functions may be, well, specialized—beyond the scope of today’s article—but that’s the broad function.
- The vessels are the tubes that allow those things to be moved around, suspended in lymph.
What’s lymph? It’s a colorless water-like liquid that transports immune cells, nutrients (and waste) around the body (through the lymphatic system).
Yes, it works alongside your vasculature; when white blood cells aren’t being deployed en masse into your bloodstream to deal with some threat, they’re waiting in the wings in the lymphatic system.
While your blood is pumped around by your heart, lymph moves based on a variety of factors, including contractions of small specialized lymphatic muscles, the pressure gradient created by the combination of those and gravity, and the movements of your body itself.
Here’s a larger article than we have room for, with diagrams we also don’t have room for:
Modelling the lymphatic system
To oversimplify it in few words for the sake of moving on: you can most of the time: think of it as an ancillary network supporting your circulatory system that unlike blood, doesn’t deal with oxygen or sugars, but does deal with a lot of other things, including:
- water and salt balance
- immune cells and other aspects of immune function
- transports fats (and any fat-soluble vitamins in them) into circulation
- cleans up stuff that gets stuck between cells
- general detoxification
There’s a lot that can go wrong if lymph isn’t flowing as it should
Too much to list here, but to give an idea:
- Arthritis and many autoimmune diseases
- Cardiovascular disease and metabolic syndrome
- Obesity, diabetes, and organ failure
- Alzheimer’s and other dementias
- Lymphadenitis, lymphangitis, and lymphedenopathy
- Lymphomas and Hodgkin’s disease (both are types of lymphatic cancer)
- Cancers of other kinds, because of things not being cleaned up where and when they should be
Yikes! That’s a lot of important things for a mostly-forgotten system to be taking care of protecting us from!
What you can do for your lymphatic system, to avoid those things!
Happily, there are easy things we can do to give our lymph some love, such as:
Massage therapy (and foam rolling)
This is the go-to that many people/publications recommend. It’s good! It’s certainly not the most important thing to do, but it’s good.
You can even use a simple gadget like this one to help move the lymph around, without needing to learn arcane massage techniques.
Exercise (move your body!)
This is a lot more important. The more we move our body, the more lymph moves around. The more lymph moves around today, the more easily it will move around tomorrow. A healthy constant movement of lymph throughout the lymphatic system is key to keeping everything running smoothly.
If you pick only one kind of exercise, make it High-Intensity Interval Training (HIIT):
How To Do HIIT (Without Wrecking Your Body)
If for some reason you really can’t do that, just spend as much of your waking time as reasonably possible, moving, per:
For ideas on how to do that, check out…
Get thee to a kitchen
This is about getting healthy food that gives your body’s clean-up crew (the lymphatic system) an easier time of it.
Rather than trying to “eat clean” which can be a very nebulous term and it’s often not at all clear (and/or hotly debated) what counts as “clean”, instead, stick to foods that constitute an anti-inflammatory diet:
Take care!
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Body Scrubs: Benefits, Risks, and Guidance
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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 was wondering whether I should be using a body scrub in the shower, rather than just soap. What should guide me in the choice of a body scrub, and are there any risks to be aware of?❞
Body scrubs are great for giving skin a healthy glow, but are best used sparingly—over-exfoliation leads to the opposite effect (unhappy skin, premature skin aging, etc).
As for contents:
- microplastics are now banned in most places, but you might want to check any products (and their containers!) are BPA-free, pthalate free, etc.
- fragrances in body scrubs are usually a bad idea, and many essential oils have been shown to be endocrine-disruptors, which you do not want:
About the microplastics, harmful artificial chemicals in general, and what constitutes “etc”:
About the fragrances’ (including “natural” essential oils’) endocrine-disrupting shenanigans:
Endocrine-disrupting chemicals: an Endocrine Society scientific statement
So, what might you want to use instead?
If you’re feeling adventurous, you might like to try treating yourself to a pineapple-based mask instead (a muslin cloth soaked in pineapple juice will work just fine; please don’t waterboard yourself though), as the bromelain enzymes (found very generously in pineapple juice) break down dead cells without the need for scrubbing.
Another option is a homemade salt- or sugar-scrub. Put your salt or sugar into a jar, add enough warm water to cover it, leave it for about a day, adding more water if it seems in danger of drying out, until it recrystallizes with a high water content keeping it malleable to the touch; congratulations, you now have a very simple scrub. This should still not be used more than, say, once per week, though.
Last but not least, you might consider investing in a konjac sponge; they gently remove dead skin without damaging living skin. Here’s an example product on Amazon, for your convenience
For more on gentle-yet-effective skincare, you might like to read:
Clean: The New Science of Skin and the Beauty of Doing Less
Enjoy!
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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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The Circadian Rhythm: Far More Than Most People Know
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The Circadian Rhythm: Far More Than Most People Know
This is Dr. Satchidananda (Satchin) Panda, the scientist behind the discovery of the blue-light sensing cell type in the retina, and the many things it affects. But, he’s discovered more…
First, what you probably know (with a little more science)
Dr. Panda discovered that melanopsin, a photopigment, is “the primary candidate for photoreceptor-mediated entrainment”.
To put that in lay terms, it’s the brain’s go-to for knowing approximately what time of day or night it is, according to how much light there is (or isn’t), and how long it has (or hasn’t) been there.
But… the brain’s “go-to” isn’t the only method. By creating mice without melanopsin, he was able to find that they still keep a circadian rhythm, even in complete darkness:
Melanopsin (Opn4) Requirement for Normal Light-Induced Circadian Phase Shifting
In other words, it was a helpful, but not completely necessary, means of keeping a circadian rhythm.
So… What else is going on?
Dr. Panda and his team did a lot of science that is well beyond the scope of this main feature, but to give you an idea:
- With jargon: it explored the mechanisms and transcription translation negative feedback loops that regulate chronobiological processes, such as a histone lysine demathlyase 1a (JARID1a) that enhances Clock-Bmal1 transcription, and then used assorted genomic techniques to develop a model for how JARID1a works to moderate the level of Per transcription by regulating the transition between its repression and activation, and discovered that this heavily centered on hepatic gluconeogenesis and glucose homeostasis, facilitated by the protein cryptochrome regulating the fasting signal that occurs when glucagon binds to a G-protein coupled receptor, triggering CREB activation.
- Without jargon: a special protein tells our body how to respond to eating/fasting at different times of day—and conversely, certain physiological responses triggered by eating/fasting help us know what time of day it is.
- Simplest: our body keeps on its best cycle if we eat at the same time every day
This is important, because our circadian rhythm matters for a lot more than sleeping/waking! Take hormones, for example:
- Obvious hormones: testosterone and estrogen peak in the mornings around 9am, progesterone peaks between 10pm and 2am
- Forgotten hormones: cortisol peaks in the morning around 8:30am, melatonin peaks between 10pm and 2am
- More hormones: ghrelin (hunger hormone) peaks around 10am, leptin (satiety hormone) peaks 20 minutes after eating a certain amount of satiety-triggering food (protein does this most quickly), insulin is heavily tied to carbohydrate intake, but will still peak and trough according to when the body expects food.
What does this mean for us in practical terms?
For a start, it means that intermittent fasting can help guard against metabolic and related diseases (including inflammation, and thus also cancer, diabetes, arthritis, and more) a lot more if we practice it with our circadian rhythm in mind.
So that “8-hour window” for eating, that many intermittent fasting practitioners adhere to, is going to do much, much better if it’s 10am to 6pm, rather than, say, 4pm to midnight.
Additionally, Dr. Panda and his team found that a 12-hour eating window wasn’t sufficient to help significantly.
Some other take-aways:
- For reasons beyond the scope of this article, it’s good to exercise a) early b) before eating, so getting in some exercise between 8.30am and 10am is ideal
- It also means it’s beneficial to “front-load” eating, so a large breakfast at 10am, and smaller meals/snacks afterwards, is best.
- It also means that getting sunlight (even if cloud-covered) around 8.30am helps guard against metabolic disorders a lot, since the light remains the body’s go-to way of knowing the time.
- We realize that sunlight is not available at 8.30am at all latitudes at all times of year. Artificial is next-best.
- It also means sexual desire will typically peak in men in the mornings (per testosterone) and women in the evenings (per progesterone), but this is just an interesting bit of trivia, and not so relevant to metabolic health
What to do next…
Want to stabilize your own circadian rhythm in the best way, and also help Dr. Panda with his research?
His team’s (free!) app, “My Circadian Clock”, can help you track and organize all of the body’s measurable-by-you circadian events, and, if you give permission, will contribute to what will be the largest-yet human study into the topics covered today, to refine the conclusions and learn more about what works best.
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ADHD… As An Adult?
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ADHD—not just for kids!
Consider the following:
- If a kid has consistent problems paying attention, it’s easy and common to say “Aha, ADHD!”
- If a young adult has consistent problems paying attention, it’s easy and common to say “Aha, a disinterested ne’er-do-well!”
- If an older adult has consistent problems paying attention, it’s easy and common to say “Aha, a senior moment!”
Yet, if we recognize that ADHD is fundamentally a brain difference in children (and we do; there are physiological characteristics that we can test), and we can recognize that as people get older our brains typically have less neuroplasticity (ability to change) than when we are younger rather than less, then… Surely, there are just as many adults with ADHD as kids!
After all, that rather goes with the linear nature of time and the progressive nature of getting older.
So why do kids get diagnoses so much more often than adults?
Parents—and schools—can find children’s ADHD challenging, and it’s their problem, so they look for an explanation, and ADHD isn’t too difficult to find as a diagnosis.
Meanwhile, adults with ADHD have usually developed coping mechanisms, have learned to mask and/or compensate for their symptoms, and we expect adults to manage their own problems, so nobody’s rushing to find an explanation on their behalf.
Additionally, the stigma of neurodivergence—especially something popularly associated with children—isn’t something that many adults will want for themselves.
But, if you have an ADHD brain, then recognizing that (even if just privately to yourself) can open the door to much better management of your symptoms… and your life.
So what does ADHD look like in adults?
ADHD involves a spread of symptoms, and not everyone will have them all, or have them in the same magnitude. However, very commonly most noticeable traits include:
- Lack of focus (ease of distraction)
- Conversely: high focus (on the wrong things)
- To illustrate: someone with ADHD might set out to quickly tidy the sock drawer, and end up Marie Kondo-ing their entire wardrobe… when they were supposed to doing something else
- Conversely: high focus (on the wrong things)
- Poor time management (especially: tendency to procrastinate)
- Forgetfulness (of various kinds—for example, forgetting information, and forgetting to do things)
Want To Take A Quick Test? Click Here ← this one is reputable, and free. No sign in required; the test is right there.
Wait, where’s the hyperactivity in this Attention Deficit Hyperactivity Disorder?
It’s often not there. ADHD is simply badly-named. This stems from how a lot of mental health issues are considered by society in terms of how much they affect (and are observable by) other people. Since ADHD was originally noticed in children (in fact being originally called “Hyperkinetic Reaction of Childhood”), it ended up being something like:
“Oh, your brain has an inconvenient relationship with dopamine and you are driven to try to correct that by shifting attention from boring things to stimulating things? You might have trouble-sitting-still disorder”
Hmm, this sounds like me (or my loved one); what to do now at the age of __?
Some things to consider:
- If you don’t want medication (there are pros and cons, beyond the scope of today’s article), you might consider an official diagnosis not worth pursuing. That’s fine if so, because…
- More important than whether or not you meet certain diagnostic criteria, is whether or not the strategies recommended for it might help you.
- Whether or not you talk to other people about it is entirely up to you. Maybe it’s a stigma you’d rather avoid… Or maybe it’ll help those around you to better understand and support you.
- Either way, you might want to learn more about ADHD in adults. Today’s article was about recognizing it—we’ll write more about managing it another time!
In the meantime… We recommended a great book about this a couple of weeks ago; you might want to check it out:
Click here to see our review of “The Silent Struggle: Taking Charge of ADHD in Adults”!
Note: the review is at the bottom of that page. You’ll need to scroll past the video (which is also about ADHD) without getting distracted by it and forgetting you were there to see about the book. So:
- Click the above link
- Scroll straight to the review!
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