Is Vitamin C Worth The Hype? (Doctorly Investigates)

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Double Board-Certified Dermatologists Dr. Muneeb Shah & Dr. Luke Maxfield weigh in on vitamin C; is it worth the hype?

Yes it is, but…

There are some caveats, for example:

  • It’s best to apply vitamin C on clean, dry skin and let it set before layering other products.
  • Avoid mixing with oxidants like benzoyl peroxide (cancels out antioxidant effects).
  • Avoid combining with copper (may negate brightening benefits).
  • Do not use with hypochlorous acid (oxidative reactions cancel out benefits).
  • Be cautious with retinol due to irritation risks.

However, used correctly, it does give very worthy benefits, and they recommend:

  • Morning use: acts as an antioxidant, pairs well with sunscreen for better protection from sun and environmental damage.
  • Night use: maximizes functions like improving tone, collagen production, texture, and reducing wrinkles.

That’s not to say that at night it stops being an antioxidant or during the day it isn’t critical for collagen synthesis, but it is to say: because of the different things our bodies typically encounter and/or do during the day or night, those are the best times to get the most out of those benefits.

They also review some popular products; here are some notes on their comments about them:

  • Skinceuticals C E Ferulic: research-backed, $180, effective but potentially irritating.
  • Skinceuticals Phloretin CF: includes 0.5% salicylic acid, good for acne-prone skin.
  • Dermatology Vitamin C E Ferulic: relatively more affordable ($70), fragrance-free, includes peptides and ceramides.
  • Drunk Elephant C-Firma: powder-to-serum formula, sued for patent infringement.
  • Paula’s Choice C15 Booster: reformulated, fragrance-free, similar to Skinceuticals.
  • Neutrogena Vitamin C Capsules: stabilized 20% ascorbic acid, single-use, travel-friendly.
  • La Roche-Posay Vitamin C Serum: contains fragrance and alcohol, not ideal for sensitive skin.
  • Matter of Fact Vitamin C Serum: includes ascorbic acid and ferulic acid, oily texture for dry skin.
  • Medik8 Super C Ferulic: stable 30% ethyl ascorbic acid, lightweight texture.
  • Naturium Vitamin C Complex: multi-form Vitamin C with niacinamide, alpha arbutin, and turmeric.
  • Timeless Vitamin C Serum: affordable ($20), 20% ascorbic acid with E and ferulic acid.

For more on all of this, enjoy:

Click Here If The Embedded Video Doesn’t Load Automatically!

Want to learn more?

You might also like:

More Than Skin-Deep: Six Ways To Eat For Healthier Skin ← this one’s about a lot more than just vitamin C 😎

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  • Daily, Weekly, Monthly: Habits Against Aging

    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.

    Dr. Anil Rajani has advice on restoring/retaining youthfulness. Two out of three of the sections are on skincare specifically, which may seem a vanity, but it’s also worth remembering that our skin is a very large and significant organ, and makes a big difference for the rest of our physical health, as well as our mental health. So, it’s worthwhile to look after it:

    The recommendations

    Daily: meditation practice

    Meditation reduces stress, which reduction in turn protects telomere length, slowing the overall aging process in every living cell of the body.

    Weekly: skincare basics

    Dr. Rajani recommends a combination of retinol and glycolic acid. The former to accelerate cell turnover, stimulate collagen production, and reduce wrinkles; the latter, to exfoliate dead cells, allowing the retinol to do its job more effectively.

    We at 10almonds would like to add: wearing sunscreen with SPF50 is a very good thing to do on any day that your phone’s weather app says the UV index is “moderate” or higher.

    Monthly: skincare extras

    Here are the real luxuries; spa visits, microneedling (stimulates collagen production), and non-ablative laser therapy. He recommends creating a home spa if possible for monthly skincare treatments, investing in high-quality devices for long-term benefits.

    For more on all of these things, enjoy:

    Click Here If The Embedded Video Doesn’t Load Automatically!

    Want to learn more?

    You might also like to read:

    Take care!

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  • Spoon-Fed – by Dr. Tim Spector

    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.

    Dr. Spector looks at widespread beliefs about food, and where those often scientifically disproven beliefs come from. Hint, there’s usually some manner of “follow the money”.

    From calorie-counting to cholesterol content, from fish to bottled water, to why of all the people who self-report having an allergy, only around half turn out to actually have one when tested, Dr. Spector sets the record straight.

    The style is as very down-to-earth and not at all self-aggrandizing; the author acknowledges his own mistakes and limitations along the way. In terms of pushing any particular agenda, his only agenda is clear: inform the public about bad science, so that we demand better science going forwards. Along the way, he gives us lots of information that can inform our personal health choices based on better science than indiscriminate headlines wildly (and sometimes intentionally) misinterpreting results.

    Read this book, and you may find yourself clicking through to read the studies for yourself, next time you see a bold headline.

    Bottom line: this book looks at a lot of what’s wrong with what a lot of people believe about healthy eating. Regular 10almonds readers might not find a lot that’s new here, but it could be a great gift for a would-be health-conscious friend or relative

    Click here to check out Spoon-Fed, and bust some myths!

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  • Constipation increases your risk of a heart attack, new study finds – and not just on the toilet

    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.

    If you Google the terms “constipation” and “heart attack” it’s not long before the name Elvis Presley crops up. Elvis had a longstanding history of chronic constipation and it’s believed he was straining very hard to poo, which then led to a fatal heart attack.

    We don’t know what really happened to the so-called King of Rock “n” Roll back in 1977. There were likely several contributing factors to his death, and this theory is one of many.

    But after this famous case researchers took a strong interest in the link between constipation and the risk of a heart attack.

    This includes a recent study led by Australian researchers involving data from thousands of people.

    Elvis Presley was said to have died of a heart attack while straining on the toilet. But is that true? Kraft74/Shutterstock

    Are constipation and heart attacks linked?

    Large population studies show constipation is linked to an increased risk of heart attacks.

    For example, an Australian study involved more than 540,000 people over 60 in hospital for a range of conditions. It found constipated patients had a higher risk of high blood pressure, heart attacks and strokes compared to non-constipated patients of the same age.

    A Danish study of more than 900,000 people from hospitals and hospital outpatient clinics also found that people who were constipated had an increased risk of heart attacks and strokes.

    It was unclear, however, if this relationship between constipation and an increased risk of heart attacks and strokes would hold true for healthy people outside hospital.

    These Australian and Danish studies also did not factor in the effects of drugs used to treat high blood pressure (hypertension), which can make you constipated.

    Man sitting on toilet, clutching tummy with one hand, holding toilet roll in other
    Researchers have studied thousands of people to see if there’s a link between constipation and heart attacks. fongbeerredhot/Shutterstock

    How about this new study?

    The recent international study led by Monash University researchers found a connection between constipation and an increased risk of heart attacks, strokes and heart failure in a general population.

    The researchers analysed data from the UK Biobank, a database of health-related information from about half a million people in the United Kingdom.

    The researchers identified more than 23,000 cases of constipation and accounted for the effect of drugs to treat high blood pressure, which can lead to constipation.

    People with constipation (identified through medical records or via a questionnaire) were twice as likely to have a heart attack, stroke or heart failure as those without constipation.

    The researchers found a strong link between high blood pressure and constipation. Individuals with hypertension who were also constipated had a 34% increased risk of a major heart event compared to those with just hypertension.

    The study only looked at the data from people of European ancestry. However, there is good reason to believe the link between constipation and heart attacks applies to other populations.

    A Japanese study looked at more than 45,000 men and women in the general population. It found people passing a bowel motion once every two to three days had a higher risk of dying from heart disease compared with ones who passed at least one bowel motion a day.

    How might constipation cause a heart attack?

    Chronic constipation can lead to straining when passing a stool. This can result in laboured breathing and can lead to a rise in blood pressure.

    In one Japanese study including ten elderly people, blood pressure was high just before passing a bowel motion and continued to rise during the bowel motion. This increase in blood pressure lasted for an hour afterwards, a pattern not seen in younger Japanese people.

    One theory is that older people have stiffer blood vessels due to atherosclerosis (thickening or hardening of the arteries caused by a build-up of plaque) and other age-related changes. So their high blood pressure can persist for some time after straining. But the blood pressure of younger people returns quickly to normal as they have more elastic blood vessels.

    As blood pressure rises, the risk of heart disease increases. The risk of developing heart disease doubles when systolic blood pressure (the top number in your blood pressure reading) rises permanently by 20 mmHg (millimetres of mercury, a standard measure of blood pressure).

    The systolic blood pressure rise with straining in passing a stool has been reported to be as high as 70 mmHg. This rise is only temporary but with persistent straining in chronic constipation this could lead to an increased risk of heart attacks.

    Doctor wearing white coat checking patient's blood pressure
    High blood pressure from straining on the toilet can last after pooing, especially in older people. Andrey_Popov/Shutterstock

    Some people with chronic constipation may have an impaired function of their vagus nerve, which controls various bodily functions, including digestion, heart rate and breathing.

    This impaired function can result in abnormalities of heart rate and over-activation of the flight-fight response. This can, in turn, lead to elevated blood pressure.

    Another intriguing avenue of research examines the imbalance in gut bacteria in people with constipation.

    This imbalance, known as dysbiosis, can result in microbes and other substances leaking through the gut barrier into the bloodstream and triggering an immune response. This, in turn, can lead to low-grade inflammation in the blood circulation and arteries becoming stiffer, increasing the risk of a heart attack.

    This latest study also explored genetic links between constipation and heart disease. The researchers found shared genetic factors that underlie both constipation and heart disease.

    What can we do about this?

    Constipation affects around 19% of the global population aged 60 and older. So there is a substantial portion of the population at an increased risk of heart disease due to their bowel health.

    Managing chronic constipation through dietary changes (particularly increased dietary fibre), increased physical activity, ensuring adequate hydration and using medications, if necessary, are all important ways to help improve bowel function and reduce the risk of heart disease.

    Vincent Ho, Associate Professor and clinical academic gastroenterologist, Western Sydney University

    This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • Anxiety Attack vs Panic Attack: Do You Know The Difference?
  • HRT Side Effects & Troubleshooting

    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.

    This is Dr. Heather Hirsch. She’s a board-certified internist, and her clinical expertise focuses on women’s health, particularly in midlife and menopause, and its intersection with chronic diseases (ranging from things associated with sexual health, to things like osteoporosis and heart disease).

    So, what does she want us to know?

    HRT can be life-changingly positive, but it can be a shaky start

    Hormone Replacement Therapy (HRT), and in this context she’s talking specifically about the most common kind, Menopausal Hormone Therapy (MHT), involves taking hormones that our body isn’t producing enough of.

    If these are “bioidentical hormones” as used in most of the industrialized world and increasingly also in N. America, then this is by definition a supplement rather than a drug, for what it’s worth, whereas some non-bioidentical hormones (or hormone analogs, which by definition function similarly to hormones but aren’t the same thing) can function more like drugs.

    We wrote a little about his previously:

    Hormone Replacement Therapy: A Tale Of Two Approaches

    For most people most of the time, bioidentical hormones are very much the best way to go, as they are not only more effective, but also have fewer side effects.

    That said, even bioidentical hormones can have some undesired effects, so, how to deal with those?

    Don’t worry; bleed happy

    A reprise of (usually quite light) menstrual bleeding is the most common side effect of menopausal HRT.

    This happens because estrogen affects* the uterus, leading to a build-up and shedding of the uterine lining.

    *if you do not have a uterus, estrogen can effect uterine tissue. That’s not a typo—here we mean the verb “effect”, as in “cause to be”. It will not grow a new uterus, but it can cause some clumps of uterine tissue to appear; this means that it becomes possible to get endometriosis without having a uterus. This information should not be too shocking, as endometriosis is a matter of uterine tissue growing inconveniently, often in places where it shouldn’t, and sometimes quite far from the uterus (if present, or its usual location, if absent). However, the risk of this happening is far lower than if you actually have a uterus:

    What you need to know about endometriosis

    Back to “you have a uterus and it’s making you wish you didn’t”:

    This bleeding should, however, be light. It’ll probably be oriented around a 28-day cycle even if you are taking your hormones at the same dose every day of the month, and the bleeding will probably taper off after about 6 months of this.

    If the bleeding is heavier, all the time, or persists longer than 6 months, then speak to your gynecologist about it. Any of those three; it doesn’t have to be all three!

    Bleeding outside of one’s normal cycle can be caused by anything from fibroids to cancer; statistically speaking it’s probably nothing too dire,but when your safety is in question, don’t bet on “probably”, and do get it checked out:

    When A Period Is Very Late (i.e., Post-Menopause)

    Dr. Hirsch recommends, as possible remedies to try (preferably under your gynecologist’s supervision):

    • lowering your estrogen dose
    • increasing your progesterone dose
    • taking progesterone continuously instead of cyclically

    And if you’re not taking progesterone, here’s why you might want to consider taking this important hormone that works with estrogen to do good things, and against estrogen to rein in some of estrogen’s less convenient things:

    Progesterone Menopausal HRT: When, Why, And How To Benefit

    (the above link contains, as well as textual information, an explanatory video from Dr. Hirsch herself)

    Get the best of the breast

    Calm your tits. Soothe your boobs. Destress your breasts. Hakuna your tatas. Undo the calamity beleaguering your mammaries.

    Ok, more seriously…

    Breast tenderness is another very common symptom when starting to take estrogen. It can worry a lot of people (à la “aagh, what is this and is it cancer!?”), but is usually nothing to worry about. But just to be sure, do also check out:

    Keeping Abreast Of Your Cancer Risk: How To Triple Your Breast Cancer Survival Chances

    Estrogen can cause feelings of breast fullness, soreness, nipple irritation, and sometimes lactation, but this later will be minimal—we’re talking a drop or two now and again, not anything that would feed a baby.

    Basically, it happens when your body hasn’t been so accustomed to normal estrogen levels in a while, and suddenly wakes up with a jolt, saying to itself “Wait what are we doing puberty again now? I thought we did menopause? Are we pregnant? What’s going on? Ok, checking all systems!” and then may calm down not too long afterwards when it notes that everything is more or less as it should be already.

    If this persists or is more than a minor inconvenience though, Dr. Hirsch recommends looking at the likely remedies of:

    • Adjust estrogen (usually the cause)
    • Adjust progesterone (less common)
    • If it’s progesterone, changing the route of administration can ameliorate things

    What if it’s not working? Is it just me?

    Dr. Hirsch advises the most common reasons are simply:

    • wrong formulation (e.g. animal-derived estrogen or hormone analog, instead of bioidentical)
    • wrong dose (e.g. too low)
    • wrong route of administration (e.g. oral vs transdermal; usually transdermal estradiol is most effective but many people do fine on oral; progesterone meanwhile is usually best as a pessary/suppository, but many people do fine on oral)

    Writer’s example: in 2022 there was an estrogen shortage in my country, and while I had been on transdermal estradiol hemihydrate gel, I had to go onto oral estradiol valerate tablets for a few months, because that’s what was available. And the tablets simply did not work for me at all. I felt terrible and I have a good enough intuitive sense of my hormones to know when “something wrong is not right”, and a good enough knowledge of the pharmacology & physiology to know what’s probably happening (or not happening). And sure enough, when I got my blood test results, it was as though I’d been taking nothing. It was such a relief to get back on the gel once it became available again!

    So, if something doesn’t seem to be working for you, speak up and get it fixed if at all possible.

    See also: What You Should Have Been Told About Menopause Beforehand

    Want to know more from Dr. Hirsch?

    You might like this book of hers, which we haven’t reviewed yet, but present here for your interest:

    Unlock Your Menopause Type: A Personalized Guide to Managing Your Menopausal Symptoms and Enhancing Your Health – by Dr. Heather Hirsch

    Enjoy!

    Don’t Forget…

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    Learn to Age Gracefully

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  • The Art and Science of Connection – by Kasley Killam, MPH

    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.

    We can eat well, exercise well, and even sleep well, and we’ll still have a +53% increased all-cause mortality if we lack social connection—even if we technically have support and access to social resources, just not the real human connection itself. And as we get older, it gets increasingly easy to find ourselves isolated.

    The author is a social scientist by profession, and it shows. None of what she shares in the book is wishy-washy; it has abundant scientific references coming thick and fast, and a great deal of clarity with regard to terms, something often not found in books of this genre that lean more towards the art than the science.

    On which note, for the reader who may be thinking “I am indeed quite alone”, she also offers proven techniques for remedying that; not in the way that many books use the word “proven” to mean “we got some testimonials”, but rather, proven in the sense of “we did science to it and based on these 17 large population-based retrospective cohort studies, we can say with 99% confidence that this is an effective tool to mediate improved social bonds and social health outcomes”.

    To this end, it’s a very practical book also, and should bestow upon any isolated reader a sense of confidence that in fact, things can be better. A particular strength is that it also looks at many different scenarios, so for the “what if I…” people with clear reasons why social connection is not abundantly available, yes, she has such cases covered too.

    Bottom line: if you’d like to live more healthily for longer, social health is an underrated and oft-forgotten way of greatly increasing those things, by science.

    Click here to check out The Art And Science Of Social Connection, and get connected!

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  • Mythbusting The Mask Debate

    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.

    Mythbusting The Mask Debate

    We asked you for your mask policy this respiratory virus season, and got the above-depicted, below-described, set of responses:

    • A little under half of you said you will be masking when practical in indoor public places
    • A little over a fifth of you said you will mask only if you have respiratory virus symptoms
    • A little under a fifth of you said that you will not mask, because you don’t think it helps
    • A much smaller minority of you (7%) said you will go with whatever people around you are doing
    • An equally small minority of you said that you will not mask, because you’re not concerned about infections

    So, what does the science say?

    Wearing a mask reduces the transmission of respiratory viruses: True or False?

    True…with limitations. The limitations include:

    • The type of mask
      • A homemade polyester single-sheet is not the same as an N95 respirator, for instance
    • How well it is fitted
      • It needs to be a physical barrier, so a loose-fitting “going through the motions” fit won’t help
    • The condition of the mask
      • And if applicable, the replaceable filter in the mask
    • What exactly it has to stop
      • What kind of virus, what kind of viral load, what kind of environment, is someone coughing/sneezing, etc

    More details on these things can be found in the link at the end of today’s main feature, as it’s more than we could fit here!

    Note: We’re talking about respiratory viruses in general in this main feature, but most extant up-to-date research is on COVID, so that’s going to appear quite a lot. Remember though, even COVID is not one beast, but many different variants, each with their own properties.

    Nevertheless, the scientific consensus is “it does help, but is not a magical amulet”:

    Wearing a mask is actually unhygienic: True or False?

    False, assuming your mask is clean when you put it on.

    This (the fear of breathing more of one’s own germs in a cyclic fashion) was a point raised by some of those who expressed mask-unfavorable views in response to our poll.

    There have been studies testing this, and they mostly say the same thing, “if it’s clean when you put it on, great, if not, then well yes, that can be a problem”:

    ❝A longer mask usage significantly increased the fungal colony numbers but not the bacterial colony numbers.

    Although most identified microbes were non-pathogenic in humans; Staphylococcus epidermidis, Staphylococcus aureus, and Cladosporium, we found several pathogenic microbes; Bacillus cereus, Staphylococcus saprophyticus, Aspergillus, and Microsporum.

    We also found no associations of mask-attached microbes with the transportation methods or gargling.

    We propose that immunocompromised people should avoid repeated use of masks to prevent microbial infection.❞

    Source: Bacterial and fungal isolation from face masks under the COVID-19 pandemic

    Wearing a mask can mean we don’t get enough oxygen: True or False?

    False, for any masks made-for-purpose (i.e., are by default “breathable”), under normal conditions:

    However, wearing a mask while engaging in strenuous best-effort cardiovascular exercise, will reduce VO₂max. To be clear, you will still have more than enough oxygen to function; it’s not considered a health hazard. However, it will reduce peak athletic performance:

    Effects of wearing a cloth face mask on performance, physiological and perceptual responses during a graded treadmill running exercise test

    …so if you are worrying about whether the mask will impede you breathing, ask yourself: am I engaging in an activity that requires my peak athletic performance?

    Also: don’t let it get soaked with water, because…

    Writer’s anecdote as an additional caveat: in the earliest days of the COVID pandemic, I had a simple cloth mask on, the one-piece polyester kind that we later learned quite useless. The fit wasn’t perfect either, but one day I was caught in heavy rain (I had left it on while going from one store to another while shopping), and suddenly, it fitted perfectly, as being soaked through caused it to cling beautifully to my face.

    However, I was now effectively being waterboarded. I will say, it was not pleasant, but also I did not die. I did buy a new mask in the next store, though.

    tl;dr = an exception to “no it won’t impede your breathing” is that a mask may indeed impede your breathing if it is made of cloth and literally soaked with water; that is how waterboarding works!

    Want up-to-date information?

    Most of the studies we cited today were from 2022 or 2023, but you can get up-to-date information and guidance from the World Health Organization, who really do not have any agenda besides actual world health, here:

    Coronavirus disease (COVID-19): Masks | Frequently Asked Questions

    At the time of writing this newsletter, the above information was last updated yesterday.

    Take care!

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    Learn to Age Gracefully

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