Do We Need Sunscreen In Winter, Really?
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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 keep seeing advice that we shoudl wear sunscreen out in winter even if it’s not hot or sunny, but is there actually any real benefit to this?❞
Short answer: yes (but it’s indeed not as critical as it is during summer’s hot/sunny days)
Longer answer: first, let’s examine the physics of summer vs winter when it comes to the sun…
In summer (assuming we live far enough from the equator to have this kind of seasonal variation), the part of the planet where we live is tilted more towards the sun. This makes it closer, and more importantly, it’s more directly overhead during the day. The difference in distance through space isn’t as big a deal as the difference in distance through the atmosphere. When the sun is more directly overhead, its rays have a shorter path through our atmosphere, and thus less chance of being blocked by cloud cover / refracted elsewhere / bounced back off into space before it even gets that far.
In winter, the opposite of all that is true.
Morning/evening also somewhat replicate this compared to midday, because the sun being lower in the sky has a similar effect to seasonal variation causing it to be less directly overhead.
For this reason, even though visually the sun may be just as bright on a winter morning as it is on a summer midday, the rays have been filtered very differently by the time they get to us.
This is one reason why you’re much less likely to get sunburned in the winter, compared to the summer (others include the actual temperature difference, your likely better hydration, and your likely more modest attire protecting you).
However…
The reason it is advisable to wear sunscreen in winter is not generally about sunburn, and is rather more about long-term cumulative skin damage (ranging from accelerated aging to cancer) caused by the UV rays—specifically, mostly UVA rays, since UVB rays (with their higher energy but shorter wavelength) have nearly all been blocked by the atmosphere.
Here’s a good explainer of that from the American Cancer Society:
UV (Ultraviolet) Radiation and Cancer Risk
👆 this may seem like a no-brainer, but there’s a lot explained here that demystifies a lot of things, covering ionizing vs non-ionizing radiation, x-rays and gamma-rays, the very different kinds of cancer caused by different things, and what things are dangerous vs which there’s no need to worry about (so far as best current science can say, at least).
Consequently: yes, if you value your skin health and avoidance of cancer, wearing sunscreen when out even in the winter is a good idea. Especially if your phone’s weather app says the UV index is “moderate” or above, but even if it’s “low”, it doesn’t hurt to include it as part of your skincare routine.
But what if sunscreens are dangerous?
Firstly, not all sunscreens are created equal:
Learn more: Who Screens The Sunscreens?
Secondly: consider putting on a protective layer of moisturizer first, and then the sunscreen on top. Bear in mind, this is winter we’re talking about, so you’re probably not going out in a bikini, so this is likely a face-neck-hands job and you’re done.
What about vitamin D?
Humans evolved to have more or less melanin in our skin depending on where we lived, and white people evolved to wring the most vitamin D possible out of the meagre sun far from the equator. Black people’s greater melanin, on the other hand, offers some initial protection against the sun (but any resultant skin cancer is then more dangerous than it would be for white people if it does occur, so please do use sunscreen whatever your skintone).
Nowadays many people live in many places which may or may not be the places we evolved for, and so we have to take that into account when it comes to sun exposure.
Here’s a deeper dive into that, for those who want to learn:
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Why Zebras Don’t Get Ulcers – by Dr. Robert M. Sapolsky
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The book does kick off with a section that didn’t age well—he talks of the stress induced globally by the Spanish Flu pandemic of 1918, and how that kind of thing just doesn’t happen any more. Today, we have much less existentially dangerous stressors!
However, the fact we went and had another pandemic really only adds weight to the general arguments of the book, rather than detracting.
We are consistently beset by “the slings and arrows of outrageous fortune” as Shakespeare would put it, and there’s a reason (or twenty) why many people go grocery-shopping with the cortisol levels of someone being hunted for sport.
So, why don’t zebras get ulcers, as they actually are hunted for food?
They don’t have rent to pay or a mortgage, they don’t have taxes, or traffic, or a broken washing machine, or a project due in the morning. Their problems come one at a time. They have a useful stress response to a stressful situation (say, being chased by lions), and when the danger is over, they go back to grazing. They have time to recover.
For us, we are (usually) not being chased by lions. But we have everything else, constantly, around the clock. So, how to fix that?
Dr. Sapolsky comprehensively describes our physiological responses to stress in quite different terms than many. By reframing stress responses as part of the homeostatic system—trying to get the body back into balance—we find a solution, or rather: ways to help our bodies recover.
The style is “pop-science” and is very accessible for the lay reader while still clearly coming from a top-level academic who is neck-deep in neuroendocrinological research. Best of both worlds!
Bottom line: if you try to take very day at a time, but sometimes several days gang up on you at once, and you’d like to learn more about what happens inside you as a result and how to fix that, this book is for you!
Click here to check out “Why Zebras Don’t Get Ulcers” and give yourself a break!
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Good (Or Bad) Health Starts With Your Blood
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Blood Should Be Only Slightly Thicker Than Water
This is Dr. Casey Means, a physician, lecturer (mostly at Stanford), and CMO of a metabolic health company, Levels, as well as being Associate Editor of the International Journal of Diabetes Reversal and Prevention, where she serves alongside such names as Dr. Colin Campbell, Dr. Joel Fuhrman, Dr. Michael Greger, Dr. William Li, Dr. Dean Ornish, and you get the idea: it’s a star-studded cast.
What does she want us to know?
The big blood problem:
❝We’re spending 3.8 trillion dollars a year on healthcare costs in the U.S., and the reality is that people are getting sicker, fatter, and more depressed.
Over 50% of Americans have pre-diabetes or type 2 diabetes; it’s insane, that number should be close to zero.❞
~ Dr. Casey Means
Indeed, pre-diabetes and especially type 2 diabetes should be very avoidable in any wealthy nation.
Unfortunately, the kind of diet that avoids it tends to rely on having at least 2/3 of the following:
- Money
- Time
- Knowledge
For example:
- if you have money and time, you can buy lots of fresh ingredients without undue worry, and take the time to carefully prep and cook them
- if you have money and knowledge you can have someone else shop and cook for you, or at least get meal kits delivered
- if you have time and knowledge, you can actually eat very healthily on a shoestring budget
If you have all three, then the world’s your oyster mushroom steak sautéed in extra virgin olive oil with garlic and cracked black pepper served on a bed of Swiss chard and lashed with Balsamic vinegar.
However, many Americans aren’t in the happy position of having at least 2/3, and a not-insignificant portion of the population don’t even have 1/3.
As an aside: there is a food scientist and chef who’s made it her mission to educate people about food that’s cheap, easy, and healthy:
…but today is about Dr. Means, so, what does she suggest?
Know
thyselfthy blood sugarsDr. Means argues (reasonably; this is well-backed up by general scientific consensus) that much of human disease stems from the diabetes and pre-diabetes that she mentioned above, and so we should focus on that most of all.
Our blood sugar levels being unhealthy will swiftly lead to other metabolic disorders:
Heart disease and non-alcoholic fatty liver disease are perhaps first in line, but waiting in the wings are inflammation-mediated autoimmune disorders, and even dementia, because neuroinflammation is at least as bad as inflammation anywhere else, arguably worse, and our brain can only be as healthy as the blood that feeds it and takes things that shouldn’t be there away.
Indeed,
❝Alzheimer’s dementia is now being called type 3 diabetes because it’s so related to blood sugar❞
~ Dr. Casey Means
…which sounds like a bold claim, but it’s true, even if the name is not “official” yet, it’s well-established in professional circulation:
❝We conclude that the term “type 3 diabetes” accurately reflects the fact that AD represents a form of diabetes that selectively involves the brain and has molecular and biochemical features that overlap with both T1DM and T2DM❞
~ Dr. Suzanne M. de la Monte & Dr. Jack Wands
Read in full: Alzheimer’s Disease Is Type 3 Diabetes–Evidence Reviewed ← this is from the very respectable Journal of Diabetes Science and Technology.
What to do about it
Dr. Means suggests we avoid the “glucose roller-coaster” that most Americans are on, meaning dramatic sugar spikes, or to put it in sciencese: high glycemic variability.
This leads to inflammation, oxidative stress, glycation (where sugar sticks to proteins and DNA), and metabolic dysfunction. Then there’s the flipside: reactive hypoglycemia, a result of a rapid drop in blood sugar after a spike, can cause anxiety, fatigue, weakness/trembling, brain fog, and of course cravings. And so the cycle repeats.
But it doesn’t have to!
By taking it upon ourselves to learn about what causes our blood sugars to rise suddenly or gently, we can manage our diet and other lifestyle factors accordingly.
And yes, it’s not just about diet, Dr. Means tells us. While added sugar and refined carbohydrates or indeed the main drivers of glycemic variability, our sleep, movement, stress management, and even toxin exposure play important parts too.
One way to do this, that Dr. Means recommends, is with a continuous glucose monitor:
Track Your Blood Sugars For Better Personalized Health
Another way is to just apply principles that work for almost everyone:
10 Ways To Balance Blood Sugars
Want to know more from Dr. Means?
You might like her book:
Good Energy – by Dr. Casey Means
…which goes into this in far more detail than we have room to today.
Enjoy!
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The 4 Best Stretches To Do Before Bed (And Even: To Do In Bed!)
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Contrary to the stereotype of early morning yoga sessions, the evening is actually the best time to improve flexibility.
Not only that, but there are benefits to stretching on a soft surface, such as your bed, rather than the floor—in few words, it reduces the nervous feedback that limits your flexibility.
The most comfortable yoga session
Here are three great stretches to do of an evening:
Frog pose:
- Spread your knees wide, forming 90° angles at your ankles, knees, and hips.
- Press your hips downward and experiment with tilting your tailbone upwards.
- Hold for 1–3 minutes, breathing calmly.
Half straddle stretch:
- This stretch is done with one leg extended, and your other leg bent with foot against your inner thigh.
- Keep your lower back elongated while folding forward.
- Adjust the stretch’s focus by moving towards the middle or towards the extended leg, to stretch your inner thighs more or your hamstrings more, respectively.
- Hold for 1–2 minutes per leg.
Tabletop chest stretch:
- From a tabletop position, walk/slide your hands forward and drop your chest down.
- Hold for at least 1 minute, breathing deeply.
- Variations:
- Turn thumbs upward to engage side muscles.
- Cross arms to stretch the ribs.
Cross-legged forward fold:
- Start in a cross-legged seated position and slightly shift your hips backwards.
- Fold forward, allowing the spine to round.
- Hold for 1–3 minutes, breathing calmly.
This latter is especially good despite its simplicity, as it provides a deep stretch in the outer hips and lower back.
For more on all of these plus visual demonstrations, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like:
Over 50? Do These 3 Stretches Every Morning To Avoid Pain
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Neurologists Debunk 11 Brain Myths
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Neuroscientists Dr. Santoshi Billakota and Dr. Brad Kamitaki debunk 11 myths about the brain. How many did you know?
From the top
Without further ado, the myths are…
- “We only use 10% of our brains”: False! We use most parts of our brain at different times, depending on the activity. PET/MRI scans show widespread usage.
- “The bigger the brain, the smarter the creature”: False! While there’s often a correlation, intelligence depends on brain complexity and development of specific regions, not overall size. For this reason get, for example, some corvids that are more intelligent than some dogs.
- “IQ tests are an accurate measure of intelligence”: False! IQ tests measure limited aspects of intelligence and are influenced by external factors like test conditions and education.
- “Video games rot your brain”: False! Video games can improve problem-solving, strategy, and team-building skills when played in moderation.
- “Memory gets worse as you age”: Partly false. While episodic memory may decline, semantic and procedural memory often improve with age.
- “Left-brained people are logical, and right-brained people are creative”: False! Both hemispheres work together, and personality or skills are influenced by environment and experiences, not brain hemispheres.
- “You can’t prevent a stroke”: False! Strokes can often be prevented by managing risk factors like blood pressure, cholesterol, and lifestyle choices.
- “Eating fish makes you smarter”: False! Eating fish, especially those rich in omega-3s, can support brain health but won’t increase intelligence.
- “You can always trust your senses”: False! Senses can be deceptive and influenced by emotions, memories, or neurological conditions.
- “Different sexes have different brains”: False! Structurally, brains are the same regardless of chromosomal sex; differences arise from environmental (including hormonal) and experiential factors—and even there, there’s more than enough overlap that we are far from categorizable as sexually dimorphic.
- “If you have a seizure, you have epilepsy”: False! A seizure can occur from various causes, but epilepsy is defined by recurrent unprovoked seizures and requires specific diagnosis and treatment.
For more on all of these, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
The Dopamine Myth ← a bonus 12th myth!
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Laugh Often, To Laugh Longest!
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Putting The Abs Into Absurdity
We’ve talked before about the health benefits of a broadly positive outlook on life:
Optimism Seriously Increases Longevity!
…and we’re very serious about it, but that’s about optimistic life views in general, and today we’re about not just keeping good humor in questionable circumstances, but actively finding good humor in the those moments—even when the moments in question might not be generally described as good!
After all, laughter really can be the best medicine, for example:
From the roots
First a quick recap on de-toothing the psychological aspect of threats, no matter how menacing they may be:
Hello, Emotions: Time For Radical Acceptance!
…which we can then take a step further:
What’s The Worst That Could Happen?
Choose your frame
Do you remember when that hacker hacked and publicized the US Federal no-fly list, after already hacking a nationwide cloud-based security camera company, getting access to more than 150,000 companies’ and private individuals’ security cameras, amongst various other cyber crimes, mostly various kinds of fraud and data theft?
Imagine how she (age 21) must have felt, when being indicted. What do you suppose this hacker had to say for itself under such circumstances?
❝congress is investigating now 🙂
but i stay silly :3 ❞
…the latter half of which, usually rendered “but I stay silly” or “but we stay silly” has since entered popular Gen-Z parlance, usually after expressing some negative thing, often in a state of powerlessness.
Which is an important life skill if powerlessness is something that is often likely.
It’s important for many Gen-Zs with negligible life prospects economically; it’s equally important for 60-somethings getting cancer diagnoses (statistically the most likely decade to find out one has cancer, by the way), and many other kinds of people younger, older, and in between.
Because at the end of the day, we all start powerless and we all end powerless.
Learned helplessness (two kinds)
In psychology, “learned helplessness” occurs when a person or creature gives up after learning that all and any attempts to resist a Bad Thing™ fail, perhaps even badly. A lab rat may just shut down and sit there getting electroshocked, for example. A person subjected to abuse may stop trying to improve their situation, and just go with the path of least resistance.
But, there’s another kind, wherein someone in a position of absolute powerlessness not only makes their peace with that, but also, decides that the one thing the outside world can’t control, is how they take it. Like the hacker we mentioned earlier.
Sometimes the gallows humor is even more literal, laughing at one’s own impending death. Not as a matter of bravado, but genuinely seeing the funny side.
But how?
Unfortunately, fortunately
The trick here is to “find a silver lining” that is nowhere near enough to compensate for the bad thing—and it may even be worse! But that’s fine:
“Unfortunately, I didn’t have time to do the dishes before leaving for my vacation. Fortunately, I also forgot to turn the oven off, so the house burning down covered up my messy kitchen”
Writer’s personal less drastic example: today I set my espresso machine to press me an espresso; it doesn’t have an auto-off and I got distracted and it overflowed everywhere; my immediate reaction was “Oh! I have been blessed with an abundance of coffee!”
This kind of silly little thing, on a daily basis, builds a very solid habit for life that allows one to see the funny side in even the most absurd situations, even matters of life and death (can confirm: been there enough times personally—so far so good, still alive to find the remembered absurdity silly).
The point is not to genuinely value the “silver lining”, because half the time it isn’t even one, really, and it is useless to pretend, in seriousness.
But to pretend in silliness? Now we’re onto something, and the real benefit is in the laughs we had along the way.
Because those worst moments? Are probably when we need it the most, so it’s good to get some practice in!
Want more ways to find the funny and make it a life habit?
We reviewed a good book recently:
The Humor Habit: Rewire Your Brain To Stress Less, Laugh More, And Achieve More’er – by Paul Osincup
Stay silly!
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Bridging The Generation Gap Over The Holidays
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Often seen as a time for family connection, this same holiday period is often experienced as a time of family tension. But it doesn’t have to be that way!
Hopefully this will be of benefit to readers of all ages, but we’re going to write with the largest age-group of our readership, which is people who are most likely to have Gen-Z grandkids.
why are we writing about this?
Not only are health and happiness closely linked, and not only is mental health also just health, but… In terms of the healthy longevity secrets of the “Blue Zones”, strong intergenerational connections are usually a feature.
First, the obvious:
Any holiday tensions, of course, don’t usually start with grandkids, and are more likely amongst the adults, but some points of friction can be the same:
- Differences of opinion on political/social/economic issues
- Difference of opinion on parenting/dating choices
- Differences of opinion on life priorities
And yes, by the way, that includes even young teens (and perhaps younger) having opinions on these things—we are living in an information age, and this does mean a lot of information is a lot more accessible than it used to be, including for kids. Problems (at all ages) may occur when someone is only really exposed to views from within a certain “bias bubble”, but for better or worse, most people will have an opinion on most well-known things.
As a general rule of thumb, all of these differences of opinion can be shelved if (and only if) those involved seek to avoid conflict. And while age is no guarantee of maturity, often it’ll be the older person(s) in the strongest position to redirect things. So, have a stack of “safe” topics up your sleeve.
Bonus: you can also have non-conversational distractions up your sleeve! These may be kitchen-related, for example (time to produce something distracting, or if the nascent conflict was only between you and one other person, time to go check on something, thus removing yourself from the situation).
Next, about “family time” and technology
It can be tempting to try to have a “phones away” rule, but this will tend to only exacerbate a younger person’s withdrawal.
Better: ask (with a tone of cheerful curiosity, not accusation) about what captures their attention so. Ask about their favorite YouTubers or TikTokers or whatever it is that it is for them. Learn about that Subreddit.
Or maybe (more likely for Millennials) they were following what is going on in the world via social media, which takes on an intermediary role for the delivery of world news. Hopefully this won’t run into the differences of opinion that we mentioned up top, but it could also be a perfectly good avenue of conversation, and maybe there’s more common ground than you might expect.
Meanwhile, if you’re the older generation present, chances are your own social media use is more about the human element. That’s great, but watch out:
A common faux pas is taking pictures without asking, let alone posting them online without asking. For many people this may seem an odd thing to object to, but generationally speaking, the younger someone is (down to the upper single digits, anyway) the more likely they might feel strongly about this. So, ask first.
The reason, by the way, is that in this age of digital hypervisibility, what we choose to share online can be a deeply personal thing. And, say what you will about the pros or cons of someone carefully curating an image of how they wish to be seen, shortcutting through that for them with a candid photo posted on Facebook will not endear you to them, even if you can’t see anything wrong with the photo in question, for example.
See also: Make Social Media Work For Your Mental Health
Show an interest, but don’t interrogate
This one doesn’t take too much explanation. If people want to share about their lives, they’ll need only the smallest nudge to do so. If someone passes up an opportunity to talk about something you showed an interest in, chances are they have their own reasons for not wanting to talk about it. This might be hurtful if you feel like they’re keeping you out of their life, but the best way to get them to talk to you is just to be a good listener—not an interrogator that they have to dodge.
For some powerful tools on this, see: Listening, Better
Lastly, if things aren’t so good…
43% of people are currently experiencing some sort of familial estrangement, so if that’s you, you’re not on your own.
Sometimes, it really is too late to fix things, but sometimes it isn’t; we put together a guide that might help:
Family Estrangement & How To Fix It
Take care!
Don’t Forget…
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