Yes, blue light from your phone can harm your skin. A dermatologist explains
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Social media is full of claims that everyday habits can harm your skin. It’s also full of recommendations or advertisements for products that can protect you.
Now social media has blue light from our devices in its sights.
So can scrolling on our phones really damage your skin? And will applying creams or lotions help?
Here’s what the evidence says and what we should really be focusing on.
Remind me, what actually is blue light?
Blue light is part of the visible light spectrum. Sunlight is the strongest source. But our electronic devices – such as our phones, laptops and TVs – also emit it, albeit at levels 100-1,000 times lower.
Seeing as we spend so much time using these devices, there has been some concern about the impact of blue light on our health, including on our eyes and sleep.
Now, we’re learning more about the impact of blue light on our skin.
How does blue light affect the skin?
The evidence for blue light’s impact on skin is still emerging. But there are some interesting findings.
1. Blue light can increase pigmentation
Studies suggest exposure to blue light can stimulate production of melanin, the natural skin pigment that gives skin its colour.
So too much blue light can potentially worsen hyperpigmentation – overproduction of melanin leading to dark spots on the skin – especially in people with darker skin.
2. Blue light can give you wrinkles
Some research suggests blue light might damage collagen, a protein essential for skin structure, potentially accelerating the formation of wrinkles.
A laboratory study suggests this can happen if you hold your device one centimetre from your skin for as little as an hour.
However, for most people, if you hold your device more than 10cm away from your skin, that would reduce your exposure 100-fold. So this is much less likely to be significant.
3. Blue light can disrupt your sleep, affecting your skin
If the skin around your eyes looks dull or puffy, it’s easy to blame this directly on blue light. But as we know blue light affects sleep, what you’re probably seeing are some of the visible signs of sleep deprivation.
We know blue light is particularly good at suppressing production of melatonin. This natural hormone normally signals to our bodies when it’s time for sleep and helps regulate our sleep-wake cycle.
By suppressing melatonin, blue light exposure before bed disrupts this natural process, making it harder to fall asleep and potentially reducing the quality of your sleep.
The stimulating nature of screen content further disrupts sleep. Social media feeds, news articles, video games, or even work emails can keep our brains active and alert, hindering the transition into a sleep state.
Long-term sleep problems can also worsen existing skin conditions, such as acne, eczema and rosacea.
Sleep deprivation can elevate cortisol levels, a stress hormone that breaks down collagen, the protein responsible for skin’s firmness. Lack of sleep can also weaken the skin’s natural barrier, making it more susceptible to environmental damage and dryness.
Can skincare protect me?
The beauty industry has capitalised on concerns about blue light and offers a range of protective products such as mists, serums and lip glosses.
From a practical perspective, probably only those with the more troublesome hyperpigmentation known as melasma need to be concerned about blue light from devices.
This condition requires the skin to be well protected from all visible light at all times. The only products that are totally effective are those that block all light, namely mineral-based suncreens or some cosmetics. If you can’t see the skin through them they are going to be effective.
But there is a lack of rigorous testing for non-opaque products outside laboratories. This makes it difficult to assess if they work and if it’s worth adding them to your skincare routine.
What can I do to minimise blue light then?
Here are some simple steps you can take to minimise your exposure to blue light, especially at night when it can disrupt your sleep:
- use the “night mode” setting on your device or use a blue-light filter app to reduce your exposure to blue light in the evening
- minimise screen time before bed and create a relaxing bedtime routine to avoid the types of sleep disturbances that can affect the health of your skin
- hold your phone or device away from your skin to minimise exposure to blue light
- use sunscreen. Mineral and physical sunscreens containing titanium dioxide and iron oxides offer broad protection, including from blue light.
In a nutshell
Blue light exposure has been linked with some skin concerns, particularly pigmentation for people with darker skin. However, research is ongoing.
While skincare to protect against blue light shows promise, more testing is needed to determine if it works.
For now, prioritise good sun protection with a broad-spectrum sunscreen, which not only protects against UV, but also light.
Michael Freeman, Associate Professor of Dermatology, Bond University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Brave – by Dr. Margie Warrell
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Whether it’s the courage to jump out of a plane or the courage to have a difficult conversation, bravery is an important quality that we often don’t go far out of our way to grow. At least, not as adults.
Rather than viewing bravery as a static attribute—you either have it or you don’t—psychologist Dr. Margie Warrell makes the case for its potential for lifelong development.
The book is divided into five sections:
- Live purposefully
- Speak bravely
- Work passionately
- Dig deep
- Dare boldly
…and each has approximately 10 chapters, each a few pages long, the kind that can easily make this a “chapter-a-day” daily reader.
As a quick clarification: that “speak bravely” section isn’t about public speaking, but is rather about speaking up when it counts. Life is too short for regrets, and our interactions with others tend to be what matters most in the long-run. It makes a huge difference to our life!
Dr. Warrell gives us tools to reframe our challenges and tackle them. Rather than just saying “Feel the fear and do it anyway”, she also delivers the how, in all aspects. This is one of the main values the book brings, as well as a sometimes-needed reminder of how and why being brave is something to which we should always aspire… and hold.
Bottom line: if you’d like to be more brave—in any context—this book can help. We only get one life; might as well live it.
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Healing Back Pain – by Dr. John Sarno
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Often when we review books with titles like this one, we preface it with a “what it’s not: a think-yourself-better book”.
In this case… It is, in fact, a think-yourself-better book. However, its many essay-length rave reviews caught our attention, and upon reading, we can report: its ideas are worth reading.
The focus of this book is on TMS, or “Tension Myoneural Syndrome”, to give it its full name. The author asserts (we cannot comment on the accuracy) that many cases of TMS are misdiagnosed as other things, from sciatica to lupus. When other treatments fail, or are simply not available (no cure for lupus yet, for example) or are unenticing (risky surgeries, for example), he offers an alternative approach.
Dr. Sarno lays out the case for TMS being internally fixable, since our muscles and nerves are all at the command of our brain. Rather than taking a physical-first approach, he takes a psychological-first approach, before building into a more holistic model.
The writing style is… A little dated and salesey and unnecessarily padded, to be honest, but the content makes it worthwhile.
Bottom line: if you have back pain, then the advice of this book, priced not much more than a box of top brand painkillers, seems a very reasonable thing to try.
Click here to check out Healing Back Pain, and see if it works for you!
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Scattered Minds – by Dr. Gabor Maté
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This was not the first book that Dr. Maté sat down to write, by far. But it was the first that he actually completed. Guess why.
Writing from a position of both personal and professional experience and understanding, Dr. Maté explores the inaptly-named Attention Deficit Disorder (if anything, there’s often a surplus of attention, just, to anything and everything rather than necessarily what would be most productive in the moment), its etiology, its presentation, and its management.
This is a more enjoyable book than some others by the same author, as while this condition certainly isn’t without its share of woes (often, for example, a cycle of frustration and shame re “why can’t I just do the things; this is ruining my life and it would be so easy if I could just do the things!”), it’s not nearly so bleak as entire books about trauma, addiction, and so forth (worthy as those books also are).
Dr. Maté frames it specifically as a development disorder, and one whereby with work, we can do the development later that (story of an ADHDer’s life) we should have done earlier but didn’t. In terms of practical advice, he includes a program for effecting this change, including as an adult.
The style is easy-reading, in small chapters, with ADHD’d-up readers in mind, giving a strong sense of speeding pleasantly through the book.
Bottom line: when it’s a book by Dr. Gabor Maté, you know it’s going to be good, and this is no exception. Certainly read it if you, anyone you care about, or even anyone you just spend a lot of time around, has ADHD or similar.
Click here to check out Scattered Minds, and unscatter yours!
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CBD Against Diabetes!
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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
❝CBD for diabetes! I’ve taken CBD for body pain. Did no good. Didn’t pay attention as to diabetes. I’m type 1 for 62 years. Any ideas?❞
Thanks for asking! First up, for reference, here’s our previous main feature on the topic of CBD:
CBD Oil: What Does The Science Say?
There, we touched on CBD’s effects re diabetes:
in mice / in vitro / in humans
In summary, according to the above studies, it…
- lowered incidence of diabetes in non-obese diabetic mice. By this they mean that pancreatic function improved (reduced insulitis and reduced inflammatory Th1-associated cytokine production). Obviously this has strong implications for Type 1 Diabetes in humans—but so far, just that, implications (because you are not a mouse).
- attenuated high glucose-induced endothelial cell inflammatory response and barrier disruption. Again, this is promising, but it was an in vitro study in very controlled lab conditions, and sometimes “what happens in the Petri dish, stays in the Petri dish”—in order words, these results may or may not translate to actual living humans.
- Improved insulin response ← is the main take-away that we got from reading through their numerical results, since there was no convenient conclusion given. Superficially, this may be of more interest to those with type 2 diabetes, but then again, if you have T1D and then acquire insulin resistance on top of that, you stand a good chance of dying on account of your exogenous insulin no longer working. In the case of T2D, “the pancreas will provide” (more or less), T1D, not so much.
So, what else is there out there?
The American Diabetes Association does not give a glowing review:
❝There’s a lot of hype surrounding CBD oil and diabetes. There is no noticeable effect on blood glucose (blood sugar) or insulin levels in people with type 2 diabetes. Researchers continue to study the effects of CBD on diabetes in animal studies. ❞
~ American Diabetes Association
Source: ADA | CBD & Diabetes
Of course, that’s type 2, but most research out there is for type 2, or else have been in vitro or rodent studies (and not many of those, at that).
Here’s a relatively more recent study that echoes the results of the previous mouse study we mentioned; it found:
❝CBD-treated non-obese diabetic mice developed T1D later and showed significantly reduced leukocyte activation and increased FCD in the pancreatic microcirculation.
Conclusions: Experimental CBD treatment reduced markers of inflammation in the microcirculation of the pancreas studied by intravital microscopy. ❞
~ Dr. Christian Lehmann et al.
Read more: Experimental cannabidiol treatment reduces early pancreatic inflammation in type 1 diabetes
…and here’s a 2020 study (so, more recent again) that was this time rats, and/but still more promising, insofar as it was with rats that had full-blown T1D already:
Read in full: Two-weeks treatment with cannabidiol improves biophysical and behavioral deficits associated with experimental type-1 diabetes
Finally, a paper in July 2023 (so, since our previous article about CBD), looked at the benefits of CBD against diabetes-related complications (so, applicable to most people with any kind of diabetes), and concluded:
❝CBDis of great value in the treatment of diabetes and its complications. CBD can improve pancreatic islet function, reduce pancreatic inflammation and improve insulin resistance. For diabetic complications, CBD not only has a preventive effect but also has a therapeutic value for existing diabetic complications and improves the function of target organs❞
…before continuing:
❝However, the safety and effectiveness of CBD are still needed to prove. It should be acknowledged that the clinical application of CBD in the treatment of diabetes and its complications has a long way to go.
The dissecting of the pharmacology and therapeutic role of CBD in diabetes would guide the future development of CBD-based therapeutics for treating diabetes and diabetic complications❞
~ Ibid.
Now, the first part of that is standard ass-covering, and the second part of that is standard “please fund more studies please”. Nevertheless, we must also not fail to take heed—little is guaranteed, especially when it comes to an area of research where the science is still very young.
In summary…
It seems well worth a try, and with ostensibly nothing to lose except the financial cost of the CBD.
If you do, you might want to keep careful track of a) your usual diabetes metrics (blood sugar levels before and after meals, insulin taken), and b) when you took CBD, what dose, etc, so you can do some citizen science here.
Lastly: please remember our standard disclaimer; we are not doctors, let alone your doctors, so please do check with your endocrinologist before undertaking any such changes!
Want to read more?
You might like our previous main feature:
How To Prevent And Reverse Type 2 Diabetes ← obviously this will not prevent or reverse Type 1 Diabetes, but avoiding insulin resistance is good in any case!
If you’re not diabetic and you’ve perhaps been confused throughout this article, then firstly thank you for your patience, and secondly you might like this quick primer:
The Sweet Truth About Diabetes: Debunking Diabetes Myths! ← this gives a simplified but fair overview of types 1 & 2
(for space, we didn’t cover the much less common types 3 & 4; perhaps another time we will)
Meanwhile, take care!
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Should You Soak Your Nuts?
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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
❝hi. how many almonds should one eat per day? do they need to be soaked? thank you.❞
Within reason, however many you like! Given that protein is an appetite suppressant, you’ll probably find it’s not too many.
Dr. Michael Greger, of “How Not To Die” fame, suggests aiming for 30g of nuts per day. Since almonds typically weigh about 1g each, that means 30 if it’s all almonds.
And if you’re wondering about 10 almonds? The name’s a deliberate reference to an old internet hoax about 10 almonds being the equivalent of an aspirin for treating a headache. It’s a reminder to be open-mindedly skeptical about information circulating wildly, and look into the real, evidence-based, science of things.
- Sometimes, the science validates claims, and we’re excited to share that!
- Sometimes, the science just shoots claims down, and it’s important to acknowledge when that happens too.
On which note, about soaking…
Short version: soaking can improve the absorption of some nutrients, but not much more than simply chewing thoroughly. See:
- A review of the impact of processing on nutrient bioaccessibility and digestion of almonds
- Mastication of almonds: effects of lipid bioaccessibility, appetite, and hormone response
Soaking does reduce certain “antinutrients” (compounds that block absorption of other nutrients), such as phytic acid. However, even a 24-hour soak reduces them only by about 5%:
If you don’t want to take 24-hours to get a 5% benefit, there’s good news! A 12-hour soak can result in 4% less phytic acid in chopped (but not whole) almonds:
The Effect of Soaking Almonds and Hazelnuts on Phytate and Mineral Concentrations
Lest that potentially underwhelming benefit leave a bitter taste in your mouth, one good thing about soaking almonds (if you don’t like bitter tastes, anyway) is that it will reduce their bitterness:
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I can’t afford olive oil. What else can I use?
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If you buy your olive oil in bulk, you’ve likely been in for a shock in recent weeks. Major supermarkets have been selling olive oil for up to A$65 for a four-litre tin, and up to $26 for a 750 millilitre bottle.
We’ve been hearing about the health benefits of olive oil for years. And many of us are adding it to salads, or baking and frying with it.
But during a cost-of-living crisis, these high prices can put olive oil out of reach.
Let’s take a look at why olive oil is in demand, why it’s so expensive right now, and what to do until prices come down.
Joyisjoyful/Shutterstock Remind me, why is olive oil so good for you?
Including olive oil in your diet can reduce your risk of developing type 2 diabetes and improve heart health through more favourable blood pressure, inflammation and cholesterol levels.
This is largely because olive oil is high in monounsaturated fatty acids and polyphenols (antioxidants).
Some researchers have suggested you can get these benefits from consuming up to 20 grams a day. That’s equivalent to about five teaspoons of olive oil.
Why is olive oil so expensive right now?
A European heatwave and drought have limited Spanish and Italian producers’ ability to supply olive oil to international markets, including Australia.
This has been coupled with an unusually cold and short growing season for Australian olive oil suppliers.
The lower-than-usual production and supply of olive oil, together with heightened demand from shoppers, means prices have gone up.
We’ve seen unfavourable growing conditions in Europe and Australia. KaMay/Shutterstock How can I make my olive oil go further?
Many households buy olive oil in large quantities because it is cheaper per litre. So, if you have some still in stock, you can make it go further by:
- storing it correctly – make sure the lid is on tightly and it’s kept in a cool, dark place, such as a pantry or cabinet. If stored this way, olive oil can typically last 12–18 months
- using a spray – sprays distribute oil more evenly than pourers, using less olive oil overall. You could buy a spray bottle to fill from a large tin, as needed
- straining or freezing it – if you have leftover olive oil after frying, strain it and reuse it for other fried dishes. You could also freeze this used oil in an airtight container, then thaw and fry with it later, without affecting the oil’s taste and other characteristics. But for dressings, only use fresh oil.
I’ve run out of olive oil. What else can I use?
Here are some healthy and cheaper alternatives to olive oil:
- canola oil is a good alternative for frying. It’s relatively low in saturated fat so is generally considered healthy. Like olive oil, it is high in healthy monounsaturated fats. Cost? Up to $6 for a 750mL bottle (home brand is about half the price)
- sunflower oil is a great alternative to use on salads or for frying. It has a mild flavour that does not overwhelm other ingredients. Some studies suggest using sunflower oil may help reduce your risk of heart disease by lowering LDL (bad) cholesterol and raising HDL (good) cholesterol. Cost? Up to $6.50 for a 750mL bottle (again, home brand is about half the price)
- sesame oil has a nutty flavour. It’s good for Asian dressings, and frying. Light sesame oil is typically used as a neutral cooking oil, while the toasted type is used to flavour sauces. Sesame oil is high in antioxidants and has some anti-inflammatory properties. Sesame oil is generally sold in smaller bottles than canola or sunflower oil. Cost? Up to $5 for a 150mL bottle.
There are plenty of alternative oils you can use in salads or for frying. narai chal/Shutterstock How can I use less oil, generally?
Using less oil in your cooking could keep your meals healthy. Here are some alternatives and cooking techniques:
- use alternatives for baking – unless you are making an olive oil cake, if your recipe calls for a large quantity of oil, try using an alternative such as apple sauce, Greek yoghurt or mashed banana
- use non-stick cookware – using high-quality, non-stick pots and pans reduces the need for oil when cooking, or means you don’t need oil at all
- steam instead – steam vegetables, fish and poultry to retain nutrients and moisture without adding oil
- bake or roast – potatoes, vegetables or chicken can be baked or roasted rather than fried. You can still achieve crispy textures without needing excessive oil
- grill – the natural fats in meat and vegetables can help keep ingredients moist, without using oil
- use stock – instead of sautéing vegetables in oil, try using vegetable broth or stock to add flavour
- try vinegar or citrus – use vinegar or citrus juice (such as lemon or lime) to add flavour to salads, marinades and sauces without relying on oil
- use natural moisture – use the natural moisture in ingredients such as tomatoes, onions and mushrooms to cook dishes without adding extra oil. They release moisture as they cook, helping to prevent sticking.
Lauren Ball, Professor of Community Health and Wellbeing, The University of Queensland and Emily Burch, Accredited Practising Dietitian and Lecturer, Southern Cross University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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