Who Screens The Sunscreens?
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We Screen The Sunscreens!
Yesterday, we asked you what your sunscreen policy was, and got a spread of answers. Apparently this one was quite polarizing!
One subscriber who voted for “Sunscreen is essential to protect us against skin aging and cancer” wrote:
❝My mom died of complications from melanoma, so we are vigilant about sun and sunscreen. We are a family of campers and hikers and gardeners—outdoors in all seasons—and we never burn❞
Our condolences with regard to your mom! Life is so precious, and when something like that happens, it tends to stick with us. We’re glad you and your family are taking care of yourselves.
Of the subscribers who voted for “I put some on if I think I might otherwise get sunburned”, about half wrote to express uncertainties:
- uncertainty about how safe it is, and
- uncertainty about how helpful it is
…so we’re going to tackle those questions in a moment. But what of those who voted for “Sunscreen is full of harmful chemicals that can cause cancer”?
Of those, only one wrote a message, which was to say one has to be very careful of what is in the formula.
Let’s take a look, then…
Sunscreen is full of harmful chemicals that can cause cancer: True or False?
False—according to current best science. Research is ongoing!
There are four main chemicals (found in most sunscreens) that people tend to worry about:
- Abobenzone
- Oxybenzone
- Octocrylene
- Ecamsule
Now, these two sound like four brands of rocket fuel, but then, dihydrogen monoxide (DHMO), which is also found in most sunscreens, sounds like a deadly toxin too. That’s water, by the way.
But what of these four chemicals? Well, as we say, research is ongoing, but we found a study that measured all four, to see how much got into the blood, and what adverse effects, if any, this caused.
We’ll skip to their conclusion:
❝In this preliminary study involving healthy volunteers, application of 4 commercially available sunscreens under maximal use conditions resulted in plasma concentrations that exceeded the threshold established by the FDA for potentially waiving some nonclinical toxicology studies for sunscreens. The systemic absorption of sunscreen ingredients supports the need for further studies to determine the clinical significance of these findings. These results do not indicate that individuals should refrain from the use of sunscreen.❞
Now, “exceeded the threshold established by the FDA for potentially waiving some nonclinical toxicology studies for sunscreens” sounds alarming, so why did they close with the words “These results do not indicate that individuals should refrain from the use of sunscreen”?
Let’s skip back up to a line from the results:
❝The most common adverse event was rash, which developed in 1 participant with each sunscreen.❞
This was most probably due to the oxybenzone, which can cause allergic skin reactions in some people.
Let us take a moment to remember the most common adverse event that occurs from not wearing sunscreen: sunburn!
You can read the full study here:
None of those ingredients have been found to be carcinogenic, even at the maximal blood plasma concentrations studied, from applications 4x/day to 75% of the body.
UVA rays, on the other hand, are absolutely very much known to cause cancer, and the effect is cumulative.
Sunscreen is essential to protect us against skin aging and cancer: True or False?
True, unequivocally, unless we live indoors and/or otherwise never go about under sunlight.
“But our ancestors—” lived under the same sun we do, and either used sunscreen or got advanced skin aging and cancer.
Sunscreen of times past ranged from mud to mineral lotions, but it’s pretty much always existed. Even non-human animals that have skin and don’t have fur or feathers, tend to take mud-baths in sunny parts of the world.
If you’d like to avoid oxybenzone and other chemicals, though, you might have your reasons. Maybe you’re allergic, or maybe you read that it’s a potential endocrine disruptor with estrogen-like and anti-androgenic properties that you don’t want.
There are other options, to include physical blockers containing zinc and titanium dioxide, which are generally recognized as safe and effective ingredients.
If you’re interested, you can even make your own sunscreen that blocks both UVA and UVB rays (UVA is what causes skin cancer; UVB is “milder” and is what causes sunburn):
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Yes, you do need to clean your tongue. Here’s how and why
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Has your doctor asked you to stick out your tongue and say “aaah”? While the GP assesses your throat, they’re also checking out your tongue, which can reveal a lot about your health.
The doctor will look for any changes in the tongue’s surface or how it moves. This can indicate issues in the mouth itself, as well as the state of your overall health and immunity.
But there’s no need to wait for a trip to the doctor. Cleaning your tongue twice a day can help you check how your tongue looks and feels – and improve your breath.
What does a healthy tongue look like?
Our tongue plays a crucial role in eating, talking and other vital functions. It is not a single muscle but rather a muscular organ, made up of eight muscle pairs that help it move.
The surface of the tongue is covered by tiny bumps that can be seen and felt, called papillae, giving it a rough surface.
These are sometimes mistaken for taste buds – they’re not. Of your 200,000-300,000 papillae, only a small fraction contain taste buds. Adults have up to 10,000 taste buds and they are invisible to the naked eye, concentrated mainly on the tip, sides and back of the tongue. https://www.youtube.com/embed/uYvpUl7li9Y?wmode=transparent&start=0
A healthy tongue is pink although the shade may vary from person to person, ranging from dark to light pink.
A small amount of white coating can be normal. But significant changes or discolouration may indicate a disease or other issues.
How should I clean my tongue?
Cleaning your tongue only takes around 10-15 seconds, but it’s is a good way to check in with your health and can easily be incorporated into your teeth brushing routine.
You can clean your tongue by gently scrubbing it with a regular toothbrush. This dislodges any food debris and helps prevent microbes building up on its rough textured surface.
Or you can use a special tongue scraper. These curved instruments are made of metal or plastic, and can be used alone or accompanied by scrubbing with your toothbrush.
Your co-workers will thank you as well – cleaning your tongue can help combat stinky breath. Tongue scrapers are particularly effective at removing the bacteria that commonly causes bad breath, hidden in the tongue’s surface.
What’s that stuff on my tongue?
So, you’re checking your tongue during your twice-daily clean, and you notice something different. Noting these signs is the first step. If you observe any changes and they worry you, you should talk to your GP.
Here’s what your tongue might be telling you.
White coating
Developing a white coating on the tongue’s surface is one of the most common changes in healthy people. This can happen if you stop brushing or scraping the tongue, even for a few days.
In this case, food debris and microbes have accumulated and caused plaque. Gentle scrubbing or scraping will remove this coating. Removing microbes reduces the risk of chronic infections, which can be transferred to other organs and cause serious illnesses.
Yellow coating
This may indicate oral thrush, a fungal infection that leaves a raw surface when scrubbed.
Oral thrush is common in elderly people who take multiple medications or have diabetes. It can also affect children and young adults after an illness, due to the temporary suppression of the immune system or antibiotic use.
If you have oral thrush, a doctor will usually prescribe a course of anti-fungal medication for at least a month.
Black coating
Smoking or consuming a lot of strong-coloured food and drink – such as tea and coffee, or dishes with tumeric – can cause a furry appearance. This is known as a black hairy tongue. It’s not hair, but an overgrowth of bacteria which may indicate poor oral hygiene.
Pink patches
Pink patches surrounded by a white border can make your tongue look like a map – this is called “geographic tongue”. It’s not known what causes this condition, which usually doesn’t require treatment.
Pain and inflammation
A red, sore tongue can indicate a range of issues, including:
- nutritional deficiencies such as folic acid or vitamin B12
- diseases including pernicious anaemia, Kawasaki disease and scarlet fever
- inflammation known as glossitis
- injury from hot beverages or food
- ulcers, including cold sores and canker sores
- burning mouth syndrome.
Dryness
Many medications can cause dry mouth, also called xerostomia. These include antidepressants, anti-psychotics, muscle relaxants, pain killers, antihistamines and diuretics. If your mouth is very dry, it may hurt.
What about cancer?
White or red patches on the tongue that can’t be scraped off, are long-standing or growing need to checked out by a dental professional as soon as possible, as do painless ulcers. These are at a higher risk of turning into cancer, compared to other parts of the mouth.
Oral cancers have low survival rates due to delayed detection – and they are on the rise. So checking your tongue for changes in colour, texture, sore spots or ulcers is critical.
Dileep Sharma, Professor and Head of Discipline – Oral Health, University of Newcastle
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Chocolate & Health
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Chocolate & Health: Fact or Fiction?
“Chocolate Is Good For The Heart”
“When making chocolate chip cookies, you don’t measure using cups, you measure by heart”
…but how good is chocolate when it comes to heart health?
First, what is heart health?
A healthy heart typically has a low resting pulse rate and a strong, steady beat. This is affected strongly by exercise habits, and diet plays only a support role (can’t exercise without energy from food!).
It is also important to have blood pressure within a healthy range (with high blood pressure being a more common problem than low, so things that lower blood pressure are generally considered good).
- Flavanols, flavonoids, and polyphenols in chocolate contribute to lower blood pressure
- Dark chocolate is best for these, as milk chocolate contains much less cocoa solids and more unhelpful fats
- White chocolate contains no cocoa solids and is useless for this
- Some of the fats in most commercial chocolate can contribute to atherosclerosis which raises blood pressure and ultimately can cause heart attacks.
- If you’re diabetic, you will probably not get the usual heart-related benefits from chocolate (sorry)
The Verdict: dark chocolate, in moderation, can support good heart health.
“Chocolate Is Good For The Brain”
Chocolate has been considered a “brain food”… why?
- The brain uses more calories than any other organ (chocolate has many calories)
- The heart benefits we listed above mean improved blood flow—including to your brain
- Chocolate contains phenylethylamine, a powerful chemical that has a similar effect to amphetamines… But it’s metabolized in digestion and never makes it to the central nervous system (so basically, this one’s a miss; we had a good run with the other two, though!)
The Verdict: dark chocolate, in moderation, can support good brain health
“Chocolate Is An Aphrodisiac”
“If chocolate be the food of love, pass me that cocoa; I’m starving”
Most excitingly, chocolate contains phenylethylamine, the “molecule of love” or, more accurately, lust. It has an effect similar to amphetamines, and while we can synthesize it in the body, we can also get it from certain foods. But…
Our body is so keen to get it that most of it is metabolized directly during digestion and doesn’t make it to the brain. Also, chocolate is not as good a source as cabbage—do with that information what you will!
However!
Chocolate contains theobromine and small amounts of caffeine, both stimulants and both generally likely to improve mood; it also contains flavonoids which in turn stimulate production of nitric oxide, which is a relaxant. All in all, things that are convivial to having a good time.
On the other hand…
That relaxation comes specifically with a reduction in blood pressure—something typically considered good for the health for most people most of the time… but that means lowering blood pressure in all parts of your body, which could be the opposite of what you want in intimate moments.
Chocolate also contains zinc, which is essential for hormonal health for most people—the body uses it to produce testosterone and estrogen, respectively. Zinc supplements are popularly sold to those wishing to have more energy in general and good hormonal health in particular, and rightly so. However…
This approach requires long-term supplementation—you can’t just pop a zinc tablet / bar of chocolate / almond before bed and expect immediate results. And if your daily zinc supplementation takes the form of a 3.5oz (100g) bar of chocolate, then you may find it has more effects on your health, and not all of them good!
The Verdict: dark chocolate, in moderation, may promote “the mood”, but could be a double-edged sword when it comes to “the ability”.
“Chocolate Is Good During Menstruation”
The popular wisdom goes that chocolate is rich in iron (of which more is needed during menstruation), and indeed, if you eat 7oz (150g) of dark chocolate made with 85% cocoa, you’ll get a daily a dose of iron (…and nearly 1,000 calories).
More bang-for-buck dietary sources of iron include chickpeas and broccoli, but for some mysterious reason, these are not as commonly reported as popular cravings.
The real explanation for chocolate cravings is more likely that eating chocolate—a food high in sugar and fat along with a chemical bombardment of more specialized “hey, it’s OK, you can relax now” molecules (flavanols/flavonoids, polyphenols, phenylamines, even phenylethylamine, etc) gives a simultaneous dopamine kick (the body’s main “reward” chemical) with a whole-body physiological relaxation… so, little wonder we might crave it in times of stress and discomfort!
The Verdict: it helps, not because it serves a special nutritional purpose, but rather, because the experience of eating chocolate makes us feel good.
Fun fact: Tiramisu (this writer’s favorite dessert) is literally Italian for “pick-me-up”
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New News From The Centenarian Blue Zones
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From Blue To Green…
We sometimes write about supercentenarians, which word is usually used in academia to refer to people who are not merely over 100 years of age, but over 110 years. These people can be found in many countries, but places where they have been found to be most populous (as a percentage of the local population) have earned the moniker “Blue Zones”—of which Okinawa and Sardinia are probably the most famous, but there are others too.
This is in contrast to, for example “Red Zones”, a term often used for areas where a particular disease is endemic, or areas where a disease is “merely” epidemic, but particularly rife at present.
In any case, back to the Blue Zones, where people live the longest and healthiest—because the latter part is important too! See also:
- Lifespan: how long we live
- Healthspan: how long we stay healthy (portmanteau of “healthy lifespan”)
Most of our readers don’t live in a Blue Zone (in fact, many live in a COVID Red Zone, a diabetes Red Zone, and a heart disease Red Zone), but that doesn’t mean we can’t all take tips from the Blue Zones and apply them, for example:
- The basics: The Blue Zones’ Five Pillars Of Longevity
- Going beyond: The Five Key Traits Of Healthy Aging
You may be wondering… How much good will this do me? And, we do have an answer for that:
When All’s Said And Done, How Likely Are You To Live To 100?
Now that we’re all caught-up…
The news from the Blues
A team of researchers did a big review of observational studies of centenarians and near-centenarians (aged 95+). Why include the near-centenarians, you ask? Well, most of the studies are also longitudinal, and if we’re doing an observational study of the impact of lifestyle factors on a 100-year-old, it’s helpful to know what they’ve been doing recently. Hence nudging the younger-end cutoff a little lower, so as to not begin each study with fresh-faced 100-year-olds whom we know nothing about.
Looking at thousands of centenarians (and near-centenarians, but also including some supercentenarians, up the age of 118), the researchers got a lot of very valuable data, far more than we have room to go into here (do check out the paper at the bottom of this article, if you have time; it’s a treasure trove of data), but one of the key summary findings was a short list of four factors they found contributed the most to extreme longevity:
- A diverse diet with low salt intake: in particular, a wide variety of plant diversity, including protein-rich legumes, though fish featured prominently also. On average they got 57% and 65% of their energy intake from carbohydrates, 12% to 32% from protein, and 27% to 31% from fat. As for salt, they averaged 1.6g of sodium per day, which is well within the WHO’s recommendation of averaging under 2g of sodium per day. As a matter of interest, centenarians in Okinawa itself averaged 1.1g of sodium per day.
- Low medication use: obviously there may be a degree of non-causal association here, i.e. the same people who just happened to be healthier and therefore lived longer, correspondingly took fewer medications—they took fewer medications because they were healthier; they weren’t necessarily healthier because they took fewer medications. That said, overmedication can be a big problem, especially in places with a profit motive like the US, and can increase the risk of harmful drug interactions, and side effects that then need more medications to treat the side effects, as well as direct iatrogenic damage (i.e. this drug treats your condition, but as the cost of harming you in some other way). Naturally, sometimes we really do need meds, but it’s a good reminder to do a meds review with one’s doctor once in a while, and see if everything’s still of benefit.
- Getting good sleep: not shocking, and this one’s not exactly news. But what may be shocking is that 68% of centenarians reported consistently getting enough good-quality sleep. To put that into perspective, only 35% of 10almonds readers reported regularly getting sleep in the 7–9 hours range.
- Rural living environment: more than 75% of the centenarians and near-centenarians lived in rural areas. This is not usually something touted as a Blue Zones thing on lists of Blue zones things, but this review strongly highlighted it as very relevant. In the category of things that are more obvious once it’s pointed out, though, this isn’t necessarily such a difference between “country folk” and “city folk”, so much as the ability to regularly be in green spaces has well-established health benefits physically, mentally, and both combined (such as: neurologically).
And showing that yes, even parks in cities make a significant difference:
Want to know more?
You can read the study in full here:
A systematic review of diet and medication use among centenarians and near-centenarians worldwide
Take care!
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Our Top 5 Spices: How Much Is Enough For Benefits?
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A spoonful of pepper makes the… Hang on, no, that’s not right…
We know that spices are the spice of life, and many have great health-giving qualities. But…
- How much is the right amount?
- What’s the minimum to get health benefits?
- What’s the maximum to avoid toxicity?
That last one always seems like a scary question, but please bear in mind: everything is toxic at a certain dose. Oxygen, water, you-name-it.
On the other hand, many things have a toxicity so low that one could not physically consume it sufficiently faster than the body eliminates it, to get a toxic build-up.
Consider, for example, the €50 banknote that was nearly withdrawn from circulation because one of the dyes used in it was found to be toxic. However, the note remained in circulation after scientists patiently explained that a person would have to eat many thousands of them to get a lethal dose.
So, let’s address these questions in reverse order:
What’s the maximum to avoid toxicity?
In the case of the spices we’ll look at today, the human body generally* has high tolerance for them if eaten at levels that we find comfortable eating.
*IMPORTANT NOTE: If you have (or may have) a medical condition that may be triggered by spices, go easier on them (or if appropriate, abstain completely) after you learn about that.
Check with your own physician if unsure, because not only are we not doctors, we’re specifically not your doctors, and cannot offer personalized health advice.
We’re going to be talking in averages and generalizations here. Caveat consumator.
For most people, unless you are taking the spice in such quantities that you are folding space and seeing the future, or eating them as the main constituents of your meal rather than an embellishment, you should be fine. Please don’t enter a chilli-eating contest and sue us.
What is the minimum to get health benefits and how much should we eat?
The science of physiology generally involves continuous rather than discrete data, so there’s not so much a hard threshold, as a point at which the benefits become significant. The usefulness of most nutrients we consume, be they macro- or micro-, will tend to have a bell curve.
In other words, a tiny amount won’t do much, the right amount will have a good result, and usefulness will tail off after that point. To that end, we’re going to look at the “sweet spot” of peaking on the graph.
Also note: the clinical dose is the dose of the compound, not the amount of the food that one will need to eat to get that dose. For example, food x containing compound y will not usually contain that compound at 100% rate and nothing else. We mention this so that you’re not surprised when we say “the recommended dose is 5mg of compound, so take a teaspoon of this spice”, for example.
Further note: we only have so much room here, so we’re going to list only the top benefits, and not delve into the science of them. You can see the related main features for more details, though!
The “big 5” health-giving spices, with their relevant active compound:
- Black pepper (piperine)
- Hot pepper* (capsaicin)
- Garlic (allicin)
- Ginger (gingerol)
- Turmeric (curcumin**)
*Cayenne pepper is very high in capsaicin; chilli peppers are also great
**not the same thing as cumin, which is a completely different plant. Cumin does have some health benefits of its own, but not in the same league as the spices above, and there’s only so much we have room to cover today.
Black pepper
- Benefits: antioxidant, anti-cancer, boosts bioavailability of other nutrients, aids digestion
- Dosage: 5–20mg for benefits
- Suggestion: ½ teaspoon of black pepper is sufficient for benefits. However, this writer’s kitchen dictum in this case is “if you can’t see the black pepper in/on the food, add more”—but that’s more about taste!
- Related main feature: Black Pepper’s Anti-Cancer Arsenal (And More)
Hot Pepper
- Benefits: anti-inflammatory, metabolism accelerator
- Dosage: 6mg gives benefits, 500mg is a common dose in capsules
- Suggestion: if not making a spicy dish, consider using a teaspoon of cayenne as part of the seasoning for rice or potatoes
- Related main feature: Capsaicin For Weight Loss And Against Inflammation
Garlic
- Benefits: heart health, blood sugar balancing, anti-cancer
- Dosage: 4–8µg for benefits
- Suggestion: 1–2 cloves daily is generally good. However, cooking reduces allicin content (and so does oxidation after cutting/crushing), so you may want to adjust accordingly if doing those things.
- Related main feature: The Many Health Benefits Of Garlic
Ginger
- Benefits: anti-inflammatory, antioxidant, anti-nausea
- Dosage: 3–4g for benefits
- Suggestion: 1 teaspoon grated raw ginger or ½ a teaspoon powdered ginger, can be used in baking or as part of the seasoning for a stir-fry
- Related main feature: Ginger Does A Lot More Than You Think
Turmeric
- Benefits: anti-inflammatory, anti-cancer
- Dosage: 500–2000mg for benefits
- Suggestion: ¼ teaspoon per day is sufficient for benefits; ½ teaspoon dropped into the water when cooking rice will infuse the rice with turmeric (which is very water-soluble), turn the rice a pretty golden color, and not affect the flavor. Throw in some black pepper as it increases the bioavailability of curcumin up to 2000%
- Related main feature: Why Curcumin (Turmeric) Is Worth Its Weight In Gold
Closing notes
The above five spices are very healthful for most people. Personal physiology can and will vary, so if in doubt, a) check with your doctor b) start at lowest doses and establish your tolerance (or lack thereof).
Enjoy, and stay well!
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The Power of When – by Dr. Michael Breus
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There’s a lot more to one’s circadian rhythm than just when one wakes and sleeps. This book goes into that quite deeply!
For example, those items in the subtitle? You could do them all at the same time, but it probably wouldn’t be optimal (although honestly, that does sound like quite a good life!). Rather, there are distinct times of day that we’re going to be better at certain things, and there are distinct times of day when certain things are going to be better for us.
Of course, some items are not so simple as a one-size fits all, so Dr. Breus outlines for us how to figure out our own chronotype (within four main schemas), and how to make that work for us as well as possible.
They style is easy-reading pop-science, with frequent summaries, bullet-points, quizzes, and so forth, making it easy to understand, learn, and apply.
Bottom line: if you feel like your sleep could use a do-over, then this book can help you get it into order—and the rest of your daily activities too!
Click here to check out The Power of When, and optimize your health!
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The Origin of Everyday Moods – by Dr. Robert Thayer
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First of all, what does this title mean by “everyday moods”? By this the author is referring to the kinds of moods we have just as a matter of the general wear-and-tear of everyday life—not the kind that come from major mood disorders and/or serious trauma.
The latter kinds of mood take less explaining, in any case. Dr. Thayer, therefore, spends his time on the less obvious ones—which in turn are the ones that affect most of the most, every day.
Critical to Dr. Thayer’s approach is the mapping of moods by four main quadrants:
- High energy, high tension
- High energy, low tension
- Low energy, high tension
- Low energy, low tension
…though this can be further divided into 25 sectors, if we rate each variable on a scale of 0–4. But for the first treatment, it suffices to look at whether energy and tension are high or low, respectively, and which we’d like to have more or less of.
Then (here be science) how to go about achieving that in the most efficient, evidence-based ways. So, it’s not just a theoretical book; it has great practical value too.
The style of the book is accessible, and walks a fine line between pop-science and hard science, which makes it a great book for laypersons and academics alike.
Bottom line: if you’d like the cheat codes to improve your moods and lessen the impact of bad ones, this is the book for you.
Click here to check out The Origin of Everyday Moods, and manage yours!
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