Physical Sunscreen or Chemical Sunscreen – Which is Healthier?
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Our Verdict
When comparing physical sunscreens to chemical sunscreens, we picked the physical sunscreens.
Why?
It’s easy to vote against chemical sunscreens, because it has “chemical” in the name, which tends to be offputting PR-wise no matter how healthy something is.
But in this case, there’s actual science here too!
Physical sunscreens physically block the UV rays.
- On the simplest of levels, mud is a physical sunscreen, as you can see widely used by elephants, hippos, pigs, and other animals.
- On a more sophisticated level, modern physical sunscreens often use tiny zinc particles (or similar) to block the UV rays in a way that isn’t so obvious to the naked eye—so we can still see our skin, and it looks just like we applied an oil or other moisturizer.
Chemical sunscreens interact with the UV rays in a way that absorbs them.
- Specifically, they usually convert it into relatively harmless thermal energy (heat)
- However, this can cause problems if there’s too much heat!
- Additionally, chemical sunscreens can get “used up” in a way that physical sunscreens can’t* becoming effectively deactivated once the chemical reaction has run its course and there is no more reagent left unreacted.
- Worse, some of the reagents, when broken down by the UV rays, can potentially cause harm when absorbed by the skin.
*That said, physical sunscreens will still need “topping up” because we are a living organism and our body can’t resist redistributing and using stuff—plus, depending on the climate and our activities, we can lose some externally too.
Further reading
We wrote about sunscreens (of various kinds) here:
And you can also read specifically about today’s topic in more detail, here:
What’s The Difference Between Physical And Chemical Sunscreens?
Take care!
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Widen the Window – by Dr. Elizabeth Stanley
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Firstly, about the title… That “window” that the author bids us “widen” is not a flowery metaphor, but rather, is referring to the window of exhibited resilience to stress/trauma; the “window” in question looks like an “inverted U” bell-curve on the graph.
In other words: Dr. Stanley’s main premise here is that we respond best to moderate stress (i.e: in that window, the area under the curve!), but if there is too little or too much, we don’t do so well. The key, she argues, is widening that middle part (expanding the area under the curve) in which we perform optimally. That way, we can still function in a motivated fashion without extrinsic threats, and we also don’t collapse under the weight of overwhelm, either.
The main strength of this book, however, lies in its practical exercises to accomplish that—and more.
“And more”, because the subtitle also promised recovery from trauma, and the author delivers in that regard too. In this case, it’s about widening that same window, but this time to allow one’s parasympathetic nervous system to recognize that the traumatic event is behind us, and no longer a threat; we are safe now.
Bottom line: if you would like to respond better to stress, and/or recover from trauma, this book is a very good tool.
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Reading At Night: Good Or Bad For Sleep? And Other Questions
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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
❝Would be interested in your views about “reading yourself to sleep”. I find that current affairs magazines and even modern novels do exactly the opposite. But Dickens – ones like David Copperfield and Great Expectations – I find wonderfully effective. It’s like entering a parallel universe where none of your own concerns matter. Any thoughts on the science that may explain this?!❞
Anecdotally: this writer is (like most writers) a prolific reader, and finds reading some fiction last thing at night is a good way to create a buffer between the affairs of the day and the dreams of night—but I could never fall asleep that way, unless I were truly sleep-deprived. The only danger is if I “one more chapter” my way deep into the night! For what it’s worth, bedtime reading for me means a Kindle self-backlit with low, soft lighting.
Scientifically: this hasn’t been a hugely researched area, but there are studies to work from. But there are two questions at hand (at least) here:
- one is about reading, and
- the other is about reading from electronic devices with or without blue light filters.
Here’s a study that didn’t ask the medium of the book, and concluded that reading a book in bed before going to sleep improved sleep quality, compared to not reading a book in bed:
Here’s a study that concluded that reading on an iPad (with no blue light filter) that found no difference in any metrics except EEG (so, there was no difference on time spent in different sleep states or sleep onset latency), but advised against it anyway because of the EEG readings (which showed slow wave activity being delayed by approximately 30 minutes, which is consistent with melatonin production mechanics):
Here’s another study that didn’t take EEG readings, and/but otherwise confirmed no differences being found:
We’re aware this goes against general “sleep hygiene” advice in two different ways:
- General advice is to avoid electronic devices before bedtime
- General advice is to not do activities besides sleep (and sex) in bed
…but, we’re committed to reporting the science as we find it!
Enjoy!
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A Supplement To Rival St. John’s Wort Against Depression
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Do You Feel The SAMe?
S-Adeonsyl-L-Methionone (SAMe) is a chemical found naturally in the body, and/but enjoyed widely as a supplement. The main reasons people take it are:
- Improve mood (antidepressant effect)
- Improve joints (reduce osteoarthritis symptoms)
- Improve liver (detoxifying effect)
Let’s see what the science says for each of those claims…
Does it improve mood?
It seems to perform comparably to St. John’s Wort (which is good; it performs comparably to Prozac).
Best of all, it does this with fewer contraindications (St. John’s Wort has so many contraindications).
Here’s how they stack up:
This looks very promising, though it’d be nice to see a larger body of research, to be sure.
Does it reduce osteoarthritis symptoms?
The good news: it performs comparably to ibuprofen, with fewer side effects!
The bad news: it also performs comparably to placebo!
Read into that what you will about ibuprofen’s usefulness vs OA symptoms.
Read all about it:
S-Adenosylmethionine for osteoarthritis of the knee or hip
If you were hoping for something for OA or similar symptoms, you might like our previous main features:
- Avoiding/Managing Osteoarthritis
- Managing Chronic Pain (Realistically!)
- The 7 Approaches To Pain Management
- (Science-Based) Alternative Pain Relief
Does it help against liver disease?
According to adverts for SAMe: absolutely!
According to science: we don’t know
The science for this is so weak that it’d be unworthy of mention if it weren’t for the fact that SAMe is so widely sold as good against hepatotoxicity.
To be clear: maybe it really is great! Science hasn’t yet disproved its usefulness either.
It is popularly assumed to be beneficial due to there being an association between lower levels of SAMe in the body (remember, it is also produced inside our bodies) and development of liver disease, especially cholestasis.
Here’s an example of what pretty much every study we found was like (inconclusive research based mostly on mice):
S-adenosylmethionine in liver health, injury, and cancer
For other options for liver health, consider:
Is it safe?
Safety trials have been done ranging from 3 months to 2 years, with no serious side effects coming to light. So, it appears quite safe.
That said, as with anything, there are contraindications, such as:
- if you have bipolar disorder, skip this unless directed by your health care provider, because it may worsen the symptoms of mania
- if you are on SSRIs or other serotonergic drugs, it may interact with those
- if you are immunocompromised, you might want to skip it can increase the risk of P. carinii growth in such cases
As always, do speak with your doctor/pharmacist for personalized advice.
Summary
SAMe’s evidence-based qualities seem to stack up as follows:
- Against depression: good
- Against osteoarthritis: weak
- Against liver disease: unknown
As for safety, it has been found quite safe for most people.
Where can I get it?
We don’t sell it, but here is an example product on Amazon, for your convenience
Enjoy!
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The Immunostimulant Superfood –
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First, what this book is not: a “detox cleanse” book of the kind that claims you can flush out the autism if you just eat enough celery.
What it rather is: an overview brain chemistry, gut microbiota, and the very many other bodily systems that interact with these “two brains”.
She also does some mythbusting of popular misconceptions (for example with regard to tryptophan), and explains with good science just what exactly such substances as gluten and casein can and can’t do.
The format is less of a textbook and more a multipart (i.e., chapter-by-chapter) lecture, in pop-science style though, making it very readable. There are a lot of practical advices too, and options to look up foods by effect, and what to eat for/against assorted mental states.
Bottom line: anyone who eats food is, effectively, drugging themselves in one fashion or another—so you might as well make a conscious choice about how to do so.
Click here to check out This Is Your Brain On Food, and choose what kind of day you have!
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Should Men Over 50 Get PSA?
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? 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
❝Loved the information on prostate cancer. Do recommend your readers get a PSA or equivalent test annually for over 50 yr old men.❞
(This is about: Prostate Health: What You Should Know)
Yep, or best yet, the much more accurate PSE test! But if PSA test is what’s available, it’s a lot better than nothing. And, much as it’s rarely the highlight of anyone’s day, a prostate exam by a suitably qualified professional is also a good idea.
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The Plant-Based Diet Revolution – by Dr. Alan Desomond
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Is this just another gut-healthy cooking guide? Not entirely…
For a start, it’s not just about giving you a healthy gut; it also covers a healthy heart and a healthy brain. There’s lots of science in here!
It’s also aimed as a transitional guide to eating more plants and fewer animal products, if you so choose. And if you don’t so choose, at least having the flexibility to cook both ways.
The recipes themselves (organized into basics, breakfasts, lunches, mains, desserts) are clear and easy while also being calculated to please readers (and their families) who are used to eating more meat. There are, for instance, plenty of healthy proteins, healthy fats, and comfort foods.
The “28 days” of the title refers to a meal plan using the recipes from the book; it’s not a big feature of the book though, so use it or don’t, but the cooking advice itself is more than worth the price of the book and the recipes are certainly great.
Bottom line: if you’re thinking of taking a “Meatless Mondays” approach to making your diet healthier, this book can help you do that in style!
Click here to check out The Plant-Based Diet Revolution, and upgrade your culinary repertoire!
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