Can You Reverse Gray Hair? A Dermatologist Explains
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Betteridge’s Law of Headlines states “any headline that ends in a question mark can be answered by the word no“—it’s not really a universal truth, but it’s true surprisingly often, and, as board certified dermatologist “The Beauty MD” Dr. Sam Ellis explains, it’s true in this case.
But, all is not lost.
Physiological Factors
Hair color is initially determined by genes and gene expression, instructing the body to color it with melanin (brown and black) and/or pheomelanin (blonde and red). If and when the body produces less of those pigments, our hair will go gray.
Factors that affect if/when our hair will go gray include:
- Genetics: primary determinant, essentially a programmed change
- Age: related to the above, but critically, the probability of going gray in any given year increases with age
- Ethnicity: the level of melanin in our skin is an indicator of how long we are likely to maintain melanin in our hair. Black people with the darkest skintones will thus generally go gray last, whereas white people with the lightest skintones will generally go gray first, and so on for a spectrum between the two.
- Medical conditions: immune conditions such as vitiligo, thyroid disease, and pernicious anemia promote an earlier loss of pigmentation
- Stress: oxidative stress, mainly, so factors like smoking will cause earlier graying. But yes, also chronic emotional stress does lead to oxidative stress too. Interestingly, this seems to be more about norepinephrine than cortisol, though.
- Nutrient deficiencies: the body can make a lot of things, but it needs the raw ingredients. Not having the right amounts of important vitamins and minerals will result in a loss of pigmentation (amongst other more serious problems). Vitamins B6, B9, and B12 are talked about in the video, as are iron and zinc. Copper is also needed for some hair colors. Selenium is needed for good hair health in general (but not too much, as an excess of selenium paradoxically causes hair loss), and many related things will stop working properly without adequate magnesium. Hair health will also benefit a lot from plenty of vitamin B7.
So, managing the above factors (where possible; obviously some of the above aren’t things we can influence) will result in maintaining one’s hair pigment for longer. As for texture, by the way, the reason gray hair tends to have a rougher texture is not for the lack of pigment itself, but is due to decreased sebum production. Judicious use of exogenous hair oils (e.g. argan oil, coconut oil, or whatever your preference may be) is a fine way to keep your grays conditioned.
However, once your hair has gone gray, there is no definitive treatment with good evidence for reversing that, at present. Dye it if you want to, or don’t. Many people (including this writer, who has just a couple of streaks of gray herself) find gray hair gives a distinguished look, and such harmless signs of age are a privilege not everyone gets to reach, and thus may be reasonably considered a cause for celebration
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Are you over 75? Here’s what you need to know about vitamin D
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Vitamin D is essential for bone health, immune function and overall wellbeing. And it becomes even more crucial as we age.
New guidelines from the international Endocrine Society recommend people aged 75 and over should consider taking vitamin D supplements.
But why is vitamin D so important for older adults? And how much should they take?
OPPO Find X5 Pro/Unsplash Young people get most vitamin D from the sun
In Australia, it is possible for most people under 75 to get enough vitamin D from the sun throughout the year. For those who live in the top half of Australia – and for all of us during summer – we only need to have skin exposed to the sun for a few minutes on most days.
The body can only produce a certain amount of vitamin D at a time. So staying in the sun any longer than needed is not going to help increase your vitamin D levels, while it will increase your risk of skin cancer.
But it’s difficult for people aged over 75 to get enough vitamin D from a few minutes of sunshine, so the Endocrine Society recommends people get 800 IU (international units) of vitamin D a day from food or supplements.
Why you need more as you age
This is higher than the recommendation for younger adults, reflecting the increased needs and reduced ability of older bodies to produce and absorb vitamin D.
Overall, older adults also tend to have less exposure to sunlight, which is the primary source of natural vitamin D production. Older adults may spend more time indoors and wear more clothing when outdoors.
As we age, our skin also becomes less efficient at synthesising vitamin D from sunlight.
The kidneys and the liver, which help convert vitamin D into its active form, also lose some of their efficiency with age. This makes it harder for the body to maintain adequate levels of the vitamin.
All of this combined means older adults need more vitamin D.
Deficiency is common in older adults
Despite their higher needs for vitamin D, people over 75 may not get enough of it.
Studies have shown one in five older adults in Australia have vitamin D deficiency.
In higher-latitude parts of the world, such as the United Kingdom, almost half don’t reach sufficient levels.
This increased risk of deficiency is partly due to lifestyle factors, such as spending less time outdoors and insufficient dietary intakes of vitamin D.
It’s difficult to get enough vitamin D from food alone. Oily fish, eggs and some mushrooms are good sources of vitamin D, but few other foods contain much of the vitamin. While foods can be fortified with the vitamin D (margarine, some milk and cereals), these may not be readily available or be consumed in sufficient amounts to make a difference.
In some countries such as the United States, most of the dietary vitamin D comes from fortified products. However, in Australia, dietary intakes of vitamin D are typically very low because only a few foods are fortified with it.
Why vitamin D is so important as we age
Vitamin D helps the body absorb calcium, which is essential for maintaining bone density and strength. As we age, our bones become more fragile, increasing the risk of fractures and conditions like osteoporosis.
Keeping bones healthy is crucial. Studies have shown older people hospitalised with hip fractures are 3.5 times more likely to die in the next 12 months compared to people who aren’t injured.
People over 75 often have less exposure to sunlight. Aila Images/Shutterstock Vitamin D may also help lower the risk of respiratory infections, which can be more serious in this age group.
There is also emerging evidence for other potential benefits, including better brain health. However, this requires more research.
According to the society’s systematic review, which summarises evidence from randomised controlled trials of vitamin D supplementation in humans, there is moderate evidence to suggest vitamin D supplementation can lower the risk of premature death.
The society estimates supplements can prevent six deaths per 1,000 people. When considering the uncertainty in the available evidence, the actual number could range from as many as 11 fewer deaths to no benefit at all.
Should we get our vitamin D levels tested?
The Endocrine Society’s guidelines suggest routine blood tests to measure vitamin D levels are not necessary for most healthy people over 75.
There is no clear evidence that regular testing provides significant benefits, unless the person has a specific medical condition that affects vitamin D metabolism, such as kidney disease or certain bone disorders.
Routine testing can also be expensive and inconvenient.
In most cases, the recommended approach to over-75s is to consider a daily supplement, without the need for testing.
You can also try to boost your vitamin D by adding fortified foods to your diet, which might lower the dose you need from supplementation.
Even if you’re getting a few minutes of sunlight a day, a daily vitamin D is still recommended.
Elina Hypponen, Professor of Nutritional and Genetic Epidemiology, University of South Australia and Joshua Sutherland, PhD Candidate – Nutrition and Genetic Epidemiology, University of South Australia
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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I’m So Effing Tired – by Dr. Amy Shah
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It’s easy sometimes to feel like we know more or less what we should be doing… If only we had the energy to get going!
- We know we want a better diet… But we don’t have the time/energy to cook so will go for the quickest option even when it’s not the best?
- We know we should exercise… But feel we just need to crash out on the couch for a bit first?
- We would dearly love to get better sleep… But our responsibilities aren’t facilitating that?
…and so on. Happily, Dr. Amy Shah is here with ways to cut through the Gordian Knot that is this otherwise self-perpetuating cycle of exhaustion.
Most of the book is based around tackling what Dr. Shah calls “the energy trifecta“:
- Hormone levels
- Immune system
- Gut health
You’ll note (perhaps with relief) that none of these things require an initial investment of energy that you don’t have… She’s not asking you to hit the gym at 5am, or magically bludgeon your sleep schedule into its proper place, say.
Instead, what she gives is practical, actionable, easy changes that don’t require much effort, to gently slide us back into the fast lane of actually having energy to do stuff!
In short: if you’ve ever felt like you’d like to implement a lot of very common “best practice” lifestyle advice, but just haven’t had the energy to get going, there’s more value in this handbook than in a thousand motivational pep talks.
Click here to check out “I’m So Effing Tired” and get on a better track of life!
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Type 2 Diabetic Foot Problems
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It’s Q&A Day!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
This newsletter has been growing a lot lately, and so have the questions/requests, and we love that! 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
Q: I’d like to know more about type 2 diabetic foot problems
You probably know that the “foot problems” thing has less to do with the feet and more to do with blood and nerves. So, why the feet?
The reason feet often get something like the worst of it, is because they are extremities, and in the case of blood sugars being too high for too long too often, they’re getting more damage as blood has to fight its way back up your body. Diabetic neuropathy happens when nerves are malnourished because the blood that should be keeping them healthy, is instead syrupy and sluggish.
We’ll definitely do a main feature sometime soon on keeping blood sugars healthy, for both types of diabetes plus pre-diabetes and just general advice for all.
In the meantime, here’s some very good advice on keeping your feet healthy in the context of diabetes. This one’s focussed on Type 1 Diabetes, but the advice goes for both:
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Reclaiming Body Trust – by Hilary Kinavey & Dana Sturtevant
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Authored by a therapist and a dietician, this book draws from both of their extensive professional clinical experiences, to explore how we can (often early in our lives) be led into disordered thinking when it comes to food and our bodies, and how we can “take back that which has been stolen from us”.
More prosaically: the presented goal here is for us to each figure out where we are with our own body, and how we might build our relationship with same going forwards, in the way that will work the best for us.
The style is relaxed and conversational, while taking care to cover topics that are often tricky with no less seriousness. Chapter headings such as “Your coping is rooted in wisdom”, “What does grief have to do with it?” and “Allowing for pleasure and satisfaction” give an idea of the flavors at hand here.
Bottom line: if you think your relationship with food and your body could be better, not only are you probably right, but also, this book can help.
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From immunotherapy to mRNA vaccines – the latest science on melanoma treatment explained
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More than 16,000 Australians will be diagnosed with melanoma each year. Most of these will be caught early, and can be cured by surgery.
However, for patients with advanced or metastatic melanoma, which has spread from the skin to other organs, the outlook was bleak until the advent of targeted therapies (that attack specific cancer traits) and immune therapies (that leverage the immune system). Over the past decade, these treatments have seen a significant climb in the number of advanced melanoma patients surviving for at least five years after diagnosis, from less than 10% in 2011 to around 50% in 2021.
While this is great news, there are still many melanoma patients who cannot be treated effectively with current therapies. Researchers have developed two exciting new therapies that are being evaluated in clinical trials for advanced melanoma patients. Both involve the use of immunotherapy at different times and in different ways.
The first results from these trials are now being shared publicly, offering insight into the future of melanoma treatment.
Svitlana Hulko/Shutterstock Immunotherapy before surgery
Immunotherapy works by boosting the power of a patient’s immune system to help kill cancer cells. One type of immunotherapy uses something called “immune checkpoint inhibitors”.
Immune cells carry “immune checkpoint” proteins, which control their activity. Cancer cells can interact with these checkpoints to turn off immune cells and hide from the immune system. Immune checkpoint inhibitors block this interaction and help keep the immune system activated to fight the cancer.
Results from an ongoing phase 3 trial using immune checkpoint inhibitors were recently published in the New England Journal of Medicine.
This trial used two types of immune checkpoint inhibitors: nivolumab, which blocks an immune checkpoint called PD-1, and ipilimumab, which blocks CTLA-4.
More than 16,000 Australians are diagnosed with melanoma each year. Delovely Pics/Shutterstock Some 423 patients (including many from Australia) were enrolled in the trial, and participants were randomly assigned to one of two groups.
The first group had surgery to remove their melanoma, and were then given immunotherapy (nivolumab) to help kill any remaining cancer cells. Giving a systemic (whole body) therapy such as immunotherapy after surgery is a standard way of treating melanoma. The second group received immunotherapy first (nivolumab plus ipilimumab) and then underwent surgery. This is a new approach to treating these cancers.
Based on previous observations, the researchers had predicted that giving patients immunotherapy while the whole tumour was still present would activate the tumour-fighting abilities of the patient’s immune system much better than giving it once the tumour had been removed.
Sure enough, 12 months after starting therapy, 83.7% of patients who received immunotherapy before surgery remained cancer-free, compared to 57.2% in the control group who received immunotherapy after surgery.
Based on these results, Australian of the year Georgina Long – who co-led the trial with Christian Blank from The Netherlands Cancer Institute – has suggested this method of immunotherapy before surgery should be considered a new standard of treatment for higher risk stage 3 melanoma. She also said a similar strategy should be evaluated for other cancers.
The promising results of this phase 3 trial suggest we might see this combination treatment being used in Australian hospitals within the next few years.
mRNA vaccines
Another emerging form of melanoma therapy is the post-surgery combination of a different checkpoint inhibitor (pembrolizumab, which blocks PD-1), with a messenger RNA vaccine (mRNA-4157).
While checkpoint inhibitors like pembrolizumab have been around for more than a decade, mRNA vaccines like mRNA-4157 are a newer phenomenon. You might be familiar with mRNA vaccines though, as the biotechnology companies Pfizer-BioNTech and Moderna released COVID vaccines based on mRNA technology.
mRNA-4157 works basically the same way – the mRNA is injected into the patient and produces antigens, which are small proteins that train the body’s immune system to attack a disease (in this case, cancer, and for COVID, the virus).
However, mRNA-4157 is unique – literally. It’s a type of personalised medicine, where the mRNA is created specifically to match a patient’s cancer. First, the patient’s tumour is genetically sequenced to figure out what antigens will best help the immune system to recognise their cancer. Then a patient-specific version of mRNA-4157 is created that produces those antigens.
The latest results of a three-year, phase 2 clinical trial which combined pembrolizumab and mRNA-4157 were announced this past week. Overall, 2.5 years after starting the trial, 74.8% of patients treated with immunotherapy combined with mRNA-4157 post-surgery remained cancer-free, compared to 55.6% of those treated with immunotherapy alone. These were patients who were suffering from high-risk, late-stage forms of melanoma, who generally have poor outcomes.
It’s worth noting these results have not yet been published in peer-reviewed journals. They’re available as company announcements, and were also presented at some cancer conferences in the United States.
Based on the results of this trial, the combination of pembrolizumab and the vaccine progressed to a phase 3 trial in 2023, with the first patients being enrolled in Australia. But the final results of this trial are not expected until 2029.
It is hoped this mRNA-based anti-cancer vaccine will blaze a trail for vaccines targeting other types of cancer, not just melanoma, particularly in combination with checkpoint inhibitors to help stimulate the immune system.
Despite these ongoing advances in melanoma treatment, the best way to fight cancer is still prevention which, in the case of melanoma, means protecting yourself from UV exposure wherever possible.
Sarah Diepstraten, Senior Research Officer, Blood Cells and Blood Cancer Division, WEHI (Walter and Eliza Hall Institute of Medical Research) and John (Eddie) La Marca, Senior Research Officer, Blood Cells and Blood Cancer, WEHI (Walter and Eliza Hall Institute of Medical Research)
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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If you’re worried about inflammation, stop stressing about seed oils and focus on the basics
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You’ve probably seen recent claims online seed oils are “toxic” and cause inflammation, cancer, diabetes and heart disease. But what does the research say?
Overall, if you’re worried about inflammation, cancer, diabetes and heart disease there are probably more important things to worry about than seed oils.
They may or may not play a role in inflammation (the research picture is mixed). What we do know, however, is that a high-quality diet rich in unprocessed whole foods (fruits, vegetables, nuts, seeds, grains and lean meats) is the number one thing you can to do reduce inflammation and your risk of developing diseases.
Rather than focusing on seed oils specifically, reduce your intake of processed foods more broadly and focus on eating fresh foods. So don’t stress out too much about using a bit of seed oils in your cooking if you are generally focused on all the right things.
What are seed oils?
Seed oils are made from whole seeds, such as sunflower seeds, flax seeds, chia seeds and sesame seeds. These seeds are processed to extract oil.
The most common seed oils found at grocery stores include sesame oil, canola oil, sunflower oil, flaxseed oil, corn oil, grapeseed oil and soybean oil.
Seed oils are generally affordable, easy to find and suitable for many dishes and cuisines as they often have a high smoke point.
However, most people consume seed oils in larger amounts through processed foods such as biscuits, cakes, chips, muesli bars, muffins, dipping sauces, deep-fried foods, salad dressings and margarines.
These processed foods are “discretionary”, meaning they’re OK to have occasionally. But they are not considered necessary for a healthy diet, nor recommended in our national dietary guidelines, the Australian Guide for Healthy Eating.
Seed oils often have a high smoke point.
Gleb Usovich/ShutterstockI’ve heard people say seed oils ‘promote inflammation’. Is that true?
There are two essential types of omega fatty acids: omega-3 and omega-6. These are crucial for bodily functions, and we must get them through our diet since our bodies cannot produce them.
While all oils contain varying levels of fatty acids, some argue an excessive intake of a specific omega-6 fatty acid in seed oils called “linoleic acid” may contribute to inflammation in the body.
There is some evidence linoleic acid can be converted to arachidonic acid in the body and this may play a role in inflammation. However, other research doesn’t support the idea reducing dietary linoleic acid affects the amount of arachidonic acid in your body. The research picture is not clear cut.
But if you’re keen to reduce inflammation, the best thing you can do is aim for a healthy diet that is:
- high in antioxidants (found in fruits and vegetables)
- high in “healthy”, unsaturated fatty acids (found in fatty fish, some nuts and olive oil, for example)
high in fibre (found in carrots, cauliflower, broccoli and leafy greens) and prebiotics (found in onions, leeks, asparagus, garlic and legumes)
low in processed foods.
If reducing inflammation is your goal, it’s probably more meaningful to focus on these basics than on occasional use of seed oils.
Choose foods high in fibre (like many vegetables) and prebiotics (like legumes).
Kiian Oksana/ShutterstockWhat about seed oils and heart disease, cancer or diabetes risk?
Some popular arguments against seed oils come from data from single studies on this topic. Often these are observational studies where researchers do not make changes to people’s diet or lifestyle.
To get a clearer picture, we should look at meta-analyses, where scientists combine all the data available on a topic. This helps us get a better overall view of what’s going on.
A 2022 meta-analysis of randomised controlled trials investigated the relationship between supplementation with omega-6 fatty acid (often found in seed oils) and cardiovascular disease risk (meaning disease relating to the heart and blood vessels).
The researchers found omega-6 intake did not affect the risk for cardiovascular disease or death but that further research is needed for firm conclusions. Similar findings were observed in a 2019 review on this topic.
The World Health Organization published a review and meta-analysis in 2022 of observational studies (considered lower quality evidence compared to randomised controlled trials) on this topic.
They looked at omega-6 intake and risk of death, cardiovascular disease, breast cancer, mental health conditions and type 2 diabetes. The findings show both advantages and disadvantages of consuming omega-6.
The findings reported that, overall, higher intakes of omega-6 were associated with a 9% reduced risk of dying (data from nine studies) but a 31% increased risk of postmenopausal breast cancer (data from six studies).
One of the key findings from this review was about the ratio of omega-3 fatty acids to omega-6 fatty acids. A higher omega 6:3 ratio was associated with a greater risk of cognitive decline and ulcerative colitis (an inflammatory bowel condition).
A higher omega 3:6 ratio was linked to a 26% reduced risk of depression. These mixed outcomes may be a cause of confusion among health-conscious consumers about the health impact of seed oils.
Overall, the evidence suggests that a high intake of omega-6 fatty acids from seed oils is unlikely to increase your risk of death and disease.
However, more high-quality intervention research is needed.
The importance of increasing your omega-3 fatty acids
On top of the mixed outcomes, there is clear evidence increasing the intake of omega-3 fatty acids (often found in foods such as fatty fish and walnuts) is beneficial for health.
While some seed oils contain small amounts of omega-3s, they are not typically considered rich sources.
Flaxseed oil is an exception and is one of the few seed oils that is notably high in alpha-linolenic acid (sometimes shortened to ALA), an omega-3 fatty acid.
If you are looking to increase your omega-3 intake, it’s better to focus on other sources such as fatty fish (salmon, mackerel, sardines), chia seeds, hemp seeds, walnuts, and algae-based supplements. These foods are known for their higher omega-3 content compared to seed oils.
The bottom line
At the end of the day, it’s probably OK to include small quantities of seed oils in your diet, as long as you are mostly focused on eating fresh, unprocessed foods.
The best way to reduce your risk of inflammation, heart disease, cancer or diabetes is not to focus so much on seed oils but rather on doing your best to follow the Australian Guide for Healthy Eating.
Lauren Ball, Professor of Community Health and Wellbeing, The University of Queensland and Emily Burch, Lecturer, Southern Cross University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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