The Sugary Food That Lowers Blood Sugars
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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
❝Loved the article on goji berries! I read they are good for blood sugars, is that true despite the sugar content?❞
Most berries are! Fruits that are high in polyphenols (even if they’re high in sugar), like berries, have a considerable net positive impact on glycemic health:
- Polyphenols and Glycemic Control
- Polyphenols and their effects on diabetes management: A review
- Dietary polyphenols as antidiabetic agents: Advances and opportunities
And more specifically:
Dietary berries, insulin resistance and type 2 diabetes: an overview of human feeding trials
Read more: Which Sugars Are Healthier, And Which Are Just The Same?
As for goji berries specifically, they’re very high indeed in polyphenols, and also have a hypoglycemic effect, i.e., they lower blood sugar levels (and as a bonus, increases HDL (“good” cholesterol) levels too, but that’s not the topic here):
❝The results of our study indicated a remarkable protective effect of LBP in patients with type 2 diabetes. Serum glucose was found to be significantly decreased and insulinogenic index increased during OMTT after 3 months administration of LBP. LBP also increased HDL levels in patients with type 2 diabetes. It showed more obvious hypoglycemic efficacy for those people who did not take any hypoglycemic medicine compared to patients taking hypoglycemic medicines. This study showed LBP to be a good potential treatment aided-agent for type 2 diabetes.❞
- LBP = Lycium barbarum polysaccharide, i.e. polysaccharide in/from goji berries
- OMTT = Oral metabolic tolerance test, a test of how well the blood sugars avoid spiking after a meal
For more about goji berries (and also where to get them), for reference our previous article is at:
Goji Berries: Which Benefits Do They Really Have?
Take care!
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Eat All You Want (But Wisely)
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Some Surprising Truths About Hunger And Satiety
This is Dr. Barbara Rolls. She’s Professor and Guthrie Chair in Nutritional Sciences, and Director of the Laboratory for the Study of Human Ingestive Behavior at Pennsylvania State University, after graduating herself from Oxford and Cambridge (yes, both). Her “awards and honors” take up four A4 pages, so we won’t list them all here.
Most importantly, she’s an expert on hunger, satiety, and eating behavior in general.
What does she want us to know?
First and foremost: you cannot starve yourself thin, unless you literally starve yourself to death.
What this is about: any weight lost due to malnutrition (“not eating enough” is malnutrition) will always go back on once food becomes available. So unless you die first (not a great health plan), merely restricting good will always result in “yo-yo dieting”.
So, to avoid putting the weight back on and feeling miserable every day along the way… You need to eat as much as you feel you need.
But, there’s a trick here (it’s about making you genuinely feel you need less)!
Your body is an instrument—so play it
Your body is the tool you use to accomplish pretty much anything you do. It is, in large part, at your command. Then there are other parts you can’t control directly.
Dr. Rolls advises taking advantage of the fact that much of your body is a mindless machine that will simply follow instructions given.
That includes instructions like “feel hungry” or “feel full”. But how to choose those?
Volume matters
An important part of our satiety signalling is based on a physical sensation of fullness. This, by the way, is why bariatric surgery (making a stomach a small fraction of the size it was before) works. It’s not that people can’t eat more (the stomach is stretchy and can also be filled repeatedly), it’s that they don’t want to eat more because the pressure sensors around the stomach feel full, and signal the hormone leptin to tell the brain we’re full now.
Now consider:
- On the one hand, 20 grapes, fresh and bursting with flavor
- On the other hand, 20 raisins (so, dried grapes), containing the same calories
Which do you think will get the leptin flowing sooner? Of course, the fresh grapes, because of the volume.
So if you’ve ever seen those photos that show two foods side by side with the same number of calories but one is much larger (say, a small slice of pizza or a big salad), it’s not quite the cheap trick that it might have appeared.
Or rather… It is a cheap trick; it’s just a cheap trick that works because your stomach is quite a simple organ.
So, Dr. Rolls’ advice: generally speaking, go for voluminous food. Fruit is great from this, because there’s so much water. Air-popped popcorn also works great. Vegetables, too.
Water matters, but differently than you might think
A well-known trick is to drink water before and with a meal. That’s good, it’s good to be hydrated. However, it can be better. Dr. Rolls did an experiment:
The design:
❝Subjects received 1 of 3 isoenergetic (1128 kJ) preloads 17 min before lunch on 3 d and no preload on 1 d.
The preloads consisted of 1) chicken rice casserole, 2) chicken rice casserole served with a glass of water (356 g), and 3) chicken rice soup.
The soup contained the same ingredients (type and amount) as the casserole that was served with water.❞
The results:
❝Decreasing the energy density of and increasing the volume of the preload by adding water to it significantly increased fullness and reduced hunger and subsequent energy intake at lunch.
The equivalent amount of water served as a beverage with a food did not affect satiety.❞
The conclusion:
❝Consuming foods with a high water content more effectively reduced subsequent energy intake than did drinking water with food.❞
You can read the study in full (it’s a worthwhile read!) here:
Water incorporated into a food but not served with a food decreases energy intake in lean women
Protein matters
With all those fruits and vegetables and water, you may be wondering Dr. Rolls’ stance on proteins. It’s simple: protein is an appetite suppressant.
However, it takes about 20 minutes to signal the brain about that, so having some protein in a starter (if like this writer, you’re the cook of the household, a great option is to enjoy a small portion of nuts while cooking!) gets that clock ticking, to signal satiety sooner.
It may also help in other ways:
Clinical Evidence and Mechanisms of High-Protein Diet-Induced Weight Loss
As for other foods that can suppress appetite, by the way, you might like;
25 Foods That Act As Natural Appetite Suppressants
Variety matters, and in ways other than you might think
A wide variety of foods (especially: a wide variety of plants) in one’s diet is well recognized as a key to a good balanced diet.
However…
A wide variety of dishes at the table, meanwhile, promotes greater consumption of food.
Dr. Rolls did a study on this too, a while ago now (you’ll see how old it is) but the science seems robust:
Variety in a Meal Enhances Food Intake in Man
Notwithstanding the title, it wasnot about a man (that was just how scientists wrote in ye ancient times of 1981). The test subjects were, in order: rats, cats, a mixed group of men and women, the same group again, and then a different group of all women.
So, Dr. Rolls’ advice is: it’s better to have one 20-ingredient dish, than 10 dishes with 20 ingredients between them.
Sorry! We love tapas and buffets too, but that’s the science!
So, “one-pot” meals are king in this regard; even if you serve it with one side (reasonable), that’s still only two dishes, which is pretty good going.
Note that the most delicious many-ingredient stir-fries and similar dishes from around the world also fall into this category!
Want to know more?
If you have the time (it’s an hour), you can enjoy a class of hers for free:
Want to watch it, but not right now? Bookmark it for later
Enjoy!
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Seeds: The Good, The Bad, And The Not-Really-Seeds!
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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
❝Doctors are great at saving lives like mine. I’m a two time survivor of colon cancer and have recently been diagnosed with Chron’s disease at 62. No one is the health system can or is prepared to tell me an appropriate diet to follow or what to avoid. Can you?❞
Congratulations on the survivorship!
As to Crohn’s, that’s indeed quite a pain, isn’t it? In some ways, a good diet for Crohn’s is the same as a good diet for most other people, with one major exception: fiber
…and unfortunately, that changes everything, in terms of a whole-foods majority plant-based diet.
What stays the same:
- You still ideally want to eat a lot of plants
- You definitely want to avoid meat and dairy in general
- Eating fish is still usually* fine, same with eggs
- Get plenty of water
What needs to change:
- Consider swapping grains for potatoes or pasta (at least: avoid grains)
- Peel vegetables that are peelable; discard the peel or use it to make stock
- Consider steaming fruit and veg for easier digestion
- Skip spicy foods (moderate spices, like ginger, turmeric, and black pepper, are usually fine in moderation)
Much of this latter list is opposite to the advice for people without Crohn’s Disease.
*A good practice, by the way, is to keep a food journal. There are apps that you can get for free, or you can do it the old-fashioned way on paper if prefer.
But the important part is: make a note not just of what you ate, but also of how you felt afterwards. That way, you can start to get a picture of patterns, and what’s working (or not) for you, and build up a more personalized set of guidelines than anyone else could give to you.
We hope the above pointers at least help you get going on the right foot, though!
❝Why do baked goods and deep fried foods all of a sudden become intolerable? I used to b able to ingest bakery foods and fried foods. Lately I developed an extreme allergy to Kiwi… what else should I “fear”❞
About the baked goods and the deep-fried foods, it’s hard to say without more information! It could be something in the ingredients or the method, and the intolerance could be any number of symptoms that we don’t know. Certainly, pastries and deep-fried foods are not generally substantial parts of a healthy diet, of course!
Kiwi, on the other hand, we can answer… Or rather, we can direct you to today’s “What’s happening in the health world” section below, as there is news on that front!
We turn the tables and ask you a question!
We’ll then talk about this tomorrow:
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Simply The Pits: These Underarm Myths!
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Are We Taking A Risk To Smell Fresh As A Daisy?
Yesterday, we asked you for your health-related view of underarm deodorants.
So, what does the science say?
They can cause (or increase risk of) cancer: True or False?
False, so far as we know. Obviously it’s very hard to prove a negative, but there is no credible evidence that deodorants cause cancer.
The belief that they do comes from old in vitro studies applying the deodorant directly to the cells in question, like this one with canine kidney tissues in petri dishes:
Antiperspirant Induced DNA Damage in Canine Cells by Comet Assay
Which means that if you’re not a dog and/or if you don’t spray it directly onto your internal organs, this study’s data doesn’t apply to you.
In contrast, more modern systematic safety reviews have found…
❝Neither is there clear evidence to show use of aluminum-containing underarm antiperspirants or cosmetics increases the risk of Alzheimer’s Disease or breast cancer.
Metallic aluminum, its oxides, and common aluminum salts have not been shown to be either genotoxic or carcinogenic.❞
(however, one safety risk it did find is that we should avoid eating it excessively while pregnant or breastfeeding)
Alternatives like deodorant rocks have fewer chemicals and thus are safer: True or False?
True and False, respectively. That is, they do have fewer chemicals, but cannot in scientific terms be qualifiably, let alone quantifiably, described as safer than a product that was already found to be safe.
Deodorant rocks are usually alum crystals, by the way; that is to say, aluminum salts of various kinds. So if it was aluminum you were hoping to avoid, it’s still there.
However, if you’re trying to cut down on extra chemicals, then yes, you will get very few in deodorant rocks, compared to the very many in spray-on or roll-on deodorants!
Soap and water is a safe, simple, and sufficient alternative: True or False?
True or False, depending on what you want as a result!
- If you care that your deodorant also functions as an antiperspirant, then no, soap and water will certainly not have an antiperspirant effect.
- If you care only about washing off bacteria and eliminating odor for the next little while, then yes, soap and water will work just fine.
Bonus myths:
There is no difference between men’s and women’s deodorants, apart from the marketing: True or False?
False! While to judge by the marketing, the only difference is that one smells of “evening lily” and the other smells of “chainsaw barbecue” or something, the real difference is…
- The “men’s” kind is designed to get past armpit hair and reach the skin without clogging the hair up.
- The “women’s” kind is designed to apply a light coating to the skin that helps avoid chafing and irritation.
In other words… If you are a woman with armpit hair or a man without, you might want to ignore the marketing and choose according to your grooming preferences.
Hopefully you can still find a fragrance that suits!
Shaving (or otherwise depilating) armpits is better for hygiene: True or False?
True or False, depending on what you consider “hygiene”.
Consistent with popular belief, shaving means there is less surface area for bacteria to live. And empirically speaking, that means a reduction in body odor:
However, shaving typically causes microabrasions, and while there’s no longer hair for the bacteria to enjoy, they now have access to the inside of your skin, something they didn’t have before. This can cause much more unpleasant problems in the long-run, for example:
❝Hidradenitis suppurativa is a chronic and debilitating skin disease, whose lesions can range from inflammatory nodules to abscesses and fistulas in the armpits, groin, perineum, inframammary region❞
Read more: Hidradenitis suppurativa: Basic considerations for its approach: A narrative review
And more: Hidradenitis suppurativa: Epidemiology, clinical presentation, and pathogenesis
If this seems a bit “damned if you do; damned if you don’t”, this writer’s preferred way of dodging both is to use electric clippers (the buzzy kind, as used for cutting short hair) to trim hers down low, and thus leave just a little soft fuzz.
What you do with yours is obviously up to you; our job here is just to give the information for everyone to make informed decisions whatever you choose 🙂
Take care!
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Can You Gain Muscle & Lose Fat At The Same Time?
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
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 😎
❝Is it possible to lose fat and gain muscle at the same time, or do we need to focus on one and then the other, and if so, which order is best?❞
Contrary to popular belief, you can do both simultaneously! However, it’s not as easy as doing just one or the other, which is why most bodybuilders, for example, have a “building phase” and a “cutting phase”.
The reason it’s difficult is because of the diet. Growing muscle doesn’t just take protein and micronutrients; it takes energy as well, which must come from carbohydrates and/or fats. Therefore, it is tricky to eat enough to build muscle and to fuel the workouts that are required to build the muscle (you can’t hit the gym in a state of rabbit starvation* and expect to perform well at your workout), while at the same time not eating enough carbs/fats to have any excess to store as fat.
*So-called because rabbit-meat is very lean, such that when during times of famine, European peasants tried to subsist off mostly rabbits, their health quickly plummeted for lack of energy. It’s also been called “salmon starvation”, apparently, for the same reason:
In French it’s called “Mal de caribou” (caribou sickness), by the way. But you get the idea: eat too much lean protein without enough carbs/fats, and woe shall befall.
So, if you want to do both at once, you need to be incredibly on top of your macros, and the bad news is, only you (or a coach working directly with you) can work out what precise macros requirements your body has, because it depends on your body and your activities.
The easier “half-way house”
We will get to the “building phase” and “cutting phase” of bodybuilders, but first, here’s an option that’s very worthy of consideration, and it is: forget about your weight and just focus on health while incidentally doing regular resistance exercises and HIIT.
What will happen if you do this (assuming a healthy balanced diet, nothing special and without counting anything, but we’re talking at least mostly whole-foods, and at least mostly plants; the Mediterranean diet is great for this, as it is for most things) is:
- The dietary approach described will gradually improve your metabolic health if it wasn’t already good. If it was already good, it’ll likely just maintain it, rather than improve it.
- The resistance exercises will, if engaged with seriously (it has to be difficult to do, or your muscles won’t have any reason to grow), gradually build muscle. This will be very gradual, because you’re not eating for bodybuilding, nor optimizing your general lifestyle for same. Historically many women have feared lifting weights because they don’t want to “look like a weightlifter”, but the kinds of bodies that word brings to mind are not the kind that happen by accident (especially for women, with our different hormones guiding our bodies to a different composition); it takes a lot of single-minded dedication to specifically optimize size gains, for a long time.
- The high-intensity interval training (HIIT) will more rapidly improve your metabolic health, and unlike most forms of exercise, it will actually result in a gradual reduction of fat, if you have superfluous fat to lose. This is because whereas most forms of cardio exercise increase the heartrate for a while but then have a corresponding metabolic slump afterwards to make up for it, HIIT confuses the heart (in a good way) which results in it having to grow stronger, and not doing any compensatory metabolic slump:
How To Do HIIT (Without Wrecking Your Body) ← as well as the “how to”, this also gives some of the science behind it, too
This will, thus, result in gradual gain of muscle and loss of fat—or if you take it easier with the exercise, then you can easily settle into just maintaining your body composition as it is, but that wasn’t the question today.
So, there you have it, that’s how to do both at once! Now, if you want more dramatic results, then more dramatic methods are called for:
What bodybuilders (mostly) do
Matters of genetic predisposition and commonplace use of steroids aside, here’s how bodybuilders get that “lots of muscle, no fat” figure:
- First, get into “moderate” shape if not already there.
- Bulk up: eat amounts of food that will seem unreasonable to a non-bodybuilder; eating 2x or even 3x the “recommended” daily calorie amount is common; focus is typically on getting adequate (for bodybuilding purposes) protein while also carb-loading for workouts and getting at least enough fats for fat-soluble vitamins to work. In the gym, focus on doing sets of very few reps with the heaviest weights one can safely lift, while doing minimal cardio, and also sleeping a lot (9–12hrs per day), which is essential because this is putting a huge strain on the body and it needs a chance to recover and rebuild.
- Cut down: maintain protein intake (to at least mostly maintain muscles) while keeping carbs and fats low, doing cardio work (HIIT is still ideal) and running a calorie deficit for a short while (there is no use in trying to maintain a long-term calorie deficit; your body will try to save you from starvation by storing any fat it can and slowing your metabolism).
Phases 2 and 3 are then cycled, alternating every month, or every 6 weeks, or every 2 months or so, depending on personal preferences and scheduling considerations (bodybuilders will often have competitions they are working towards, so they need to time things to be at the end of a cutting phase to look their “best” by bodybuilder standards).
Disclaimer: bodybuilding is complex, and can be ruinous to the health if practised inexpertly, because of its extreme nature. We don’t recommend serious bodybuilding per se in general, but if you are going to do it, please consult with a professional bodybuilding coach, and do not rely on a few paragraphs from us that are intended only to give the most basic overview of how bodybuilders can approach the “gain muscle, lose fat” problem.
Want to know more?
We’ve written on some related topics previously; here’s a three-part series:
- How To Lose Weight (Healthily!)
- How To Build Muscle (Healthily!)
- How To Gain Weight (Healthily!) ← this one’s specifically about gaining healthy levels of fat, for any who want/need that
And also:
Can We Do Fat Redistribution? ← yes we can, but there are caveats
Take care!
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Calculate (And Enjoy) The Perfect Night’s Sleep
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This is Dr. Michael Breus, a clinical psychologist and sleep specialist, and he wants you to get a good night’s sleep, every night.
First, let’s assume you know a lot of good advice about how to do that already in terms of environment and preparation, etc. If you want a recap before proceeding, then we recommend:
Get Better Sleep: Beyond The Basics
Now, what does he want to add?
Wake up refreshed
Of course, how obtainable this is will depend on the previous night’s sleep, but there is something important we can do here regardless, and it’s: beat sleep inertia.
Sleep inertia is what happens when we wake up groggy (for reasons other than being ill, drugged, etc) rather than refreshed. It’s not actually related to how much sleep we have, though!
Rather, it pertains to whether we woke up during a sleep cycle, or between cycles:
- If we wake up between sleep cycles, we’ll avoid sleep inertia.
- If we wake up during a sleep cycle, we’ll be groggy.
Deep sleep generally occurs in 90-minute blocks, albeit secretly that is generally 3× 20 minute blocks in a trenchcoat, with transition periods between, during which the brainwaves change frequency.
REM sleep generally occurs in 20 minute blocks, and will usually arrive in series towards the end of our natural sleep period, to fit neatly into the last 90-minute cycle.
Sometimes these will appear a little out of order, because we are complicated organic beings, but those are the general trends.
In any case, the take-away here is: interrupt them at your peril. You need to wake up between cycles. There are two ways you can do this:
- Carefully calculate everything, and set a very precise alarm clock (this will work so long as you are correct in guessing how long it will take you to fall asleep)
- Use a “sunrise” lamp alarm clock, that in the hour approaching your set alarm time, will gradually increase the light. Because the body will not naturally wake up during a cycle unless a threat is perceived (loud noise, physical rousing, etc), the sunrise lamp method means that you will wake up between sleep cycles at some point during that hour (towards the beginning or end, depending on what your sleep balance/debt is like).
Do not sleep in (even if you have a sleep debt); it will throw everything out.
Caffeine will not help much in the morning
Assuming you got a reasonable night’s sleep, your brain has been cleansed of adenosine (a sleepy chemical), and if you are suffering from sleep inertia, the grogginess is due to melatonin (a different sleepy chemical).
Caffeine is an adenosine receptor blocker, so that will do nothing to mitigate the effects of melatonin in your brain that doesn’t have any meaningful quantity of adenosine in it in the morning.
Adenosine gradually accumulates in the brain over the course of the day (and then gets washed out while we sleep), so if you’re sleepy in the afternoon (for reasons other than: you just had a nap and now have sleep inertia again), then caffeine can block that adenosine in the afternoon.
Of course, caffeine is also a stimulant (it increases adrenaline levels and promotes vasoconstriction), but its effects at healthily small doses are modest for most people, and you’d do better by splashing cold water on your face and/or listening to some upbeat music.
Learn more: The Two Sides Of Caffeine
Time your naps correctly (if you take naps)
Dr. Breus has a lot to say about this, based on a lot of clinical research, but as it’s entirely consistent with what we’ve written before (based on the exact same research), to save space we’ll link to that here:
How To Be An Expert Nap-Artist (With No “Sleep-Hangovers”)
Calculate your bedtime correctly
Remember what we said about sleep cycles? This means that that famous “7–9 hours sleep” is actually “either 7½ or 9 hours sleep”—because those are multiples of 90 minutes, whereas 8 hours (for example) is not.
So, consider the time you want to get up (ideally, this should be relatively early, and the same time every day), and then count backwards either 7½ or 9 hours sleep (you choose), add 20–30 minutes to fall asleep, and that’s your bedtime.
So for example: if you want to have 7½ hours sleep and get up at 6am, then your bedtime is anywhere between 10pm and 10:10pm.
Remember how we said not to sleep in, even if you have a sleep debt? Now is the time to pay it off, if you have one. If you normally sleep 7½ hours, then make tonight a 9-hour sleep (plus 20–30 minutes to fall asleep). This means you’ll still get up at 6am, but your bedtime is now anywhere between 8:30pm and 8:40pm.
Want to know more from Dr. Breus?
You might like this excellent book of his that we reviewed a while back:
The Power of When – by Dr. Michael Breus
Enjoy!
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The Sun Exposure Dilemma
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The Sun Exposure Dilemma
Yesterday, we asked you about your policy on sun exposure, and got the above-pictured, below-described, set of answers:
- A little over a third of respondents chose “I recognize the risks, but I think the benefits outweigh them”
- A quarter of respondents chose “I am a creature of the shadows and I avoid the sun at all costs”
- A little over a fifth of respondents chose “I recognize the benefits, but I think the risks outweigh them”
- A little under a fifth of respondents chose “I’m a sun-lover! Give me that vitamin D and other benefits!”
All in all, this is perhaps the most even spread of answers we’ve had for Friday mythbuster polls—though the sample size was smaller than it often is.
Of those who added comments, common themes were to mention your local climate, and the importance of sunscreen and/or taking vitamin D supplements.
One subscriber mentioned having lupus and living in Florida, which is a particularly unfortunate combination:
Lupus Foundation | Lupus & UV exposure: What you need to know
Another subscriber wrote:
❝Use a very good sunscreen with a high SPF all the time. Reapply after swimming or as needed! I also wear polarized sunglasses anytime I’m outside.❞
…which are important things to note too, and a lot of people forget!
See also: Who Screens The Sunscreens? (on fearing chemical dangers, vs the protection given)
But, onto today’s science for the topic at hand…
We need to get plenty of sun to get plenty of vitamin D: True or False?
True or False, depending on so many factors—to the point that many people get it wildly wrong in either direction.
Whether we are getting enough vitamin D depends on many circumstances, including:
- The climate (and depending on latitude, time of year) where we live
- Our genes, and especially (but not only) our skintone
- The clothes we wear (or don’t)
- Our diet (and not just “how much vitamin D do we consume”)
- Chronic diseases that affect vitamin D metabolism and/or requirements and/or sensitivity to the sun
For a rundown on these factors and more, check out:
Should I be getting my vitamin D levels checked?
Notably, on the topic of whether you should stay in the sun for longer to get more vitamin D…
❝The body can only produce a certain amount of vitamin D at the time, so staying in the sun any longer than needed (which could be just a few minutes, in a sunny climate) is not going to help increase your vitamin D levels, while it will increase your risk of skin cancer.❞
In contrast, she does also note:
❝During winter, catching enough sun can be difficult, especially if you spend your days confined indoors. Typically, the required exposure increases to two to three hours per week in winter. This is because sunlight exposure can only help produce vitamin D if the UVB rays reach us at the correct angle. So in winter we should regularly spend time outside in the middle of the day to get our dose of vitamin D.❞
See also: Vitamin D & Calcium: Too Much Of A Good Thing?
We can skip the sun and get our vitamin D from diet/supplements: True or False?
True! However, vitamin D is not the only health benefit of sun exposure.
Not only is sunlight-induced serotonin production important for many things ranging from mood to circadian rhythm (which in turn affects many other aspects of health), but also…
While too much sun can cause skin cancer, too little sun could cause other kinds of cancer:
Benefits of Sunlight: A Bright Spot for Human Health
Additionally, according to new research, the circadian rhythm benefits we mentioned above may also have an impact on type 2 diabetes:
Can catching some rays help you fight off type 2 diabetes?
Which way to jump?
A lot of it depends on who you are, ranging from the factors we mentioned earlier, to even such things as “having many moles” or “having blonde hair”.
This latter item, blonde hair, is a dual thing: it’s a matter of genetic factors that align with being prone to being more sensitive to the sun, as well as being a lesser physical barrier to the sun’s rays than dark hair (that can block some UV rays).
So for example, if two people have comparably gray hair now, but one of them used to have dark hair and the other blonde, there will still be a difference in how they suffer damage, or don’t—and yes, even if their skin is visually of the same approximate skintone.
You probably already know for yourself whether you are more likely to burn or tan in the sun, and the former group are less resistant to the sun’s damage… But the latter group are more likely to spend longer in the sun, and accumulate more damage that way.
If you’d like a very comprehensive downloadable, here are the guidelines issued by the UK’s National Institute for Health and Care Excellence:
NICE Guidelines | Sunlight exposure: risks and benefits
…and skip to “At risk groups”, if you don’t want to read the whole thing; “Skin type” is also an important subsection, which also uses your hair and eye color as indicators.
Writer’s note: genetics are complicated and not everyone will fall neatly into categories, which is why it’s important to know the individual factors.
For example, I am quite light-skinned with slightly graying dark hair and gray-blue eyes, and/but also have an obscure Sámi gene that means my skin makes vitamin D easily, while simultaneously being unusually resistant to burning (I just tan). Basically: built for the midnight sun of the Arctic circle.
And yet! My hobbies include not getting skin cancer, so I tend to still be quite mindful of UV levels in different weathers and times of day, and make choices (schedule, clothing, sunscreen or not) accordingly.
Bottom line:
That big self-perpetuating nuclear explosion in the sky is responsible for many things, good and bad for our health, so be aware of your own risk factors, especially for vitamin D deficiency, and skin cancer.
- If you have a predisposition to both, that’s unfortunate, but diet and supplementation at least can help with the vitamin D while getting modest amounts of sun at most.
- Remember that you can only make so much vitamin D at once, so sunbathing for health benefits need only take a few minutes
- Remember that sunlight is important for our circadian rhythm, which is important for many things.
- That’s governed by specific photoreceptor cells, though, so we don’t need our skin to be exposed for that; we just need to be able to see sunlight.
- If you’re going to be out in the sun, and not covered up, sunscreen is your friend, and yes, that goes for clear cold days under the winter sun too.
- Most phone weather apps these days have a UV index score as part of the data they give. Get used to checking it as often as you’d check for rain.
Stay safe, both ways around!
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