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?
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.
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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Colloidal Gold’s Impressive Claims
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All That Glitters…
Today we’ll be examining colloidal gold supplementation.
This issue of 10almonds brought to you by the writer suddenly getting lots of advertisements for this supplement. It’s not a new thing though, and has been around in one form or another since pretty much forever.
Colloidal gold is…
- Gold, as in the yellow metal
- Colloidal, as in “very tiny insoluble particles dispersed though another substance (such as water)”
What are the claims made for it?
Honestly, just about everything is claimed for it. But to go with some popular claims:
- Reduces inflammation
- Supports skin health
- Boosts immune function
- Combats aging
- Improves cognitive function
So, what does the science say?
Does it do those things?
The short and oversimplified answer is: no
However, there is a little bit of tangential merit, so we’re going to talk about the science of it, and how the leap gets made between what the science says and what the advertisements say.
First… What makes gold so special, in general? Historically, three things:
- It’s quite rare
- It’s quite shiny
- It’s quite unreactive
- The first is about supply and demand, so that’s not very important to us in this article.
- The second is an aesthetic quality, which actually will have a little bit of relevance, but not much.
- The third has been important historically (because it meant that shiny gold stayed shiny, because it didn’t tarnish), and now also important industrially too, as gold can be used in many processes where we basically need for nothing to happen (i.e., a very inert component is needed)
That third quality—its unreactivity—has become important in medicine.
When scientists need a way to deliver something (without the delivering object getting eaten by the body’s “eat everything” tendencies), or otherwise not interact chemically with anything around, gold is an excellent choice.
Hence gold teeth, and gold fillings, by the way. They’re not just for the bling factor; they were developed because of their unreactivity and thus safety.
So, what about those health claims we mentioned above?
Here be science (creative interpretations not included)
The most-backed-by-science claim from that list is “reduces inflammation”.
Websites selling colloidal gold cite studies such as:
Gold nanoparticles reduce inflammation in cerebral microvessels of mice with sepsis
A promising title!The results of the study showed:
❝20 nm cit-AuNP treatment reduced leukocyte and platelet adhesion to cerebral blood vessels, prevented BBB failure, reduced TNF- concentration in brain, and ICAM-1 expression both in circulating polymorphonuclear (PMN) leukocytes and cerebral blood vessels of mice with sepsis. Furthermore, 20 nm cit-AuNP did not interfere with the antibiotic effect on the survival rate of mice with sepsis.❞
That “20 nm cit-AuNP” means “20 nm citrate-covered gold nanoparticles”
So it is not so much the antioxidant powers of gold being tested here, as the antioxidant powers of citrate, a known antioxidant. The gold was the carrying agent, whose mass and unreactivity allowed it to get where it needed to be.
The paper does say the words “Gold nanoparticles have been demonstrated to own important anti-inflammatory properties“ in the abstract, but does not elaborate on that, reference it, or indicate how.
Websites selling colloidal gold also cite papers such as:
Anti-inflammatory effect of gold nanoparticles supported on metal oxides
Another promising title! However the abstract mentions:
❝The effect was dependent on the MOx NPs chemical nature
[…]
The effect of Au/TiO2 NPs was not related to Au NPs size❞
MOx NPs = mineral oxide nanoparticles. In this case, the gold was a little more than a carrying agent, though, because the gold is described and explained as being a catalytic agent (i.e., its presence helps the attached mineral oxides react more quickly).
We said that was the most-backed claim, and as you can see, it has some basis but is rather tenuous since the gold by itself won’t do anything; it just helps the mineral oxides.
Next best-backed claim builds from that, which is “supports skin health”.
Sometimes colloidal gold is sold as a facial tonic. By itself it’ll distribute (inert) gold nanoparticles across your skin, and may “give you a healthy glow”, because that’s what happens when you put shiny wet stuff on your face.
Healthwise, if the facial tonic also contains some of the minerals we mentioned above, then it may have an antioxidant effect. But again, no minerals, no effect.
The claim that it “combats aging” is really a tag-on to the “antioxidant” claim.
As for the “supports immune health” claim… Websites selling colloid gold cite studies such as:
To keep things brief: gold can fight infectious diseases in much the same way that forks can fight hunger. It’s an inert carrying agent.
As for “improves cognitive function”? The only paper we could find cited was that mouse sepsis study again, this time with the website saying “researchers found that rats treated with colloidal gold showed improved spatial memory and learning ability“ whereas the paper cited absolutely did not claim that, not remotely, not even anything close to that. It wasn’t even rats, it was mice, and they did not test their memory or learning.
Is it safe?
Colloidal gold supplementation is considered very safe, precisely because gold is one of the least chemically reactive substances you could possibly consume. It is special precisely because it so rarely does anything.
However, impurities could be introduced in the production process, and the production process often involves incredibly harsh reagents to get the gold ions, and if any of those reagents are left in the solution, well, gold is safe but sodium borohydride and chloroauric acid aren’t!
Where can I get some?
In the unlikely event that our research review has given you an urge to try it, here’s an example product on Amazon
Take care!
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Exercise and Fat Loss (5 Things You Need To Know)
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It’s easy to think “I’ll eat whatever; I can always burn it off later”, and if it’s an odd occasion, then that’s fine; indeed, a fit and healthy body can usually weather small infrequent dietary indiscretions easily. But…
You can’t outrun a bad diet
Exercise can create a calorie deficit, but over time, the body balances this out by adjusting one’s metabolism, leading to a plateau in fat loss—and as you might know, you can’t out-exercise a bad diet. On the contrary, dietary adjustments are crucial for fat loss and body recomposition.
About that calorie deficit in the first place, by the way: extreme calorie deficits through exercise alone can lead to muscle loss, reduced energy, and thus sabotage long-term fat loss because having muscle mass increases one’s base metabolic rate (while having fat does not).
Another thing to bear in mind about exercise is that longer workouts without adequate rests in between can cause burnout, injury, or weight gain due to the body doing its best to conserve energy.
So, a good diet is a necessary condition for both muscle maintenance and fat loss.
Five Key Diet Tips:
- Include foods you love: don’t feel obliged cut out favorite foods that are a little unhealthy; incorporate them in moderation for sustainability.
- Keep adjustments small: avoid making drastic dietary changes all at once; make gradual tweaks to prevent feeling deprived.
- Prioritize protein: focus on including a protein source in every meal to increase satiety and aid in muscle building.
- Avoid low-calorie diets: drastically cutting calories can lead to muscle loss, metabolic adaptation, and overeating.
- Embrace diet evolution: changes may not feel sustainable at first, but adjustments over time help achieve long-term balance. You can always “adjust course” as you go.
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 to read:
Are You A Calorie-Burning Machine?
Take care!
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Enjoy Bitter Foods For Your Heart & Brain
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When Bitter Is Better
A good general rule of thumb for “does this food contain a lot of healthy polyphenols?” is:
“is this (edible) plant bitter/astringent/pungent”?
If it is, it’s probably rich in polyphenols:
Deciphering the role of bitter and astringent polyphenols in promoting well-being
…which is why it’s no surprise that black coffee and bitter chocolate score highly, as do hot peppers and even garlic.
See also: Our Top 5 Spices: How Much Is Enough For Benefits?
Even fruits, generally considered something sweet to eat, often contain more polyphenols when they are bitter—many berries are great examples of this!
Read more: Goji Berries: Which Benefits Do They Really Have?
You can read more about the science of this here:
Sensory Nutrition and Bitterness and Astringency of Polyphenols
Important for multiple reasons (including heart and brain health)
Polyphenols have many benefits, and they’re most well known for their heart-healthy properties, but their antioxidant effect (and other mechanisms) also means these foods are generally neuroprotectants too:
The science of this is not all as obvious as you might think!
It is reasonable to expect “ok, this has antioxidant effect, so it will reduce oxidative damage to brain cells too”, and while that is true (and yes, polyphenols do cross the blood-brain barrier), they also help in other ways, including through the gut:
What if I don’t like bitter/astringent/pungent foods?
If you do not have a medical condition that proscribes them (do check with your doctor if unsure), the best advice is to simply eat them anyway, and your tastes will adapt.
It will also help if you avoid sweet foods (though this too is also a good general rule of thumb!), as this will move the balance of where your brain’s “set range” is for “good taste”.
Bonus tip: dark chocolate (80%+ cocoa if possible, 95% if you can get it) and chilli peppers go great with each other. Here’s an example of a chilli chocolate product on Amazon; it’s 70% cocoa (which is not bad, but could be better). You might be able to get a higher percentage locally, especially if you ask your local chocolatière, or make it yourself!
Enjoy!
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How to Read a Book – by Mortimer J. Adler and Charles Van Doren
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Are you a cover-to-cover person, or a dip-in-and-out person?
Mortimer Adler and Charles van Doren have made a science out of getting the most from reading books.
They help you find what you’re looking for (Maybe you want to find a better understanding of PCOS… maybe you want to find the definition of “heuristics”… maybe you want to find a new business strategy… maybe you want to find a romantic escape… maybe you want to find a deeper appreciation of 19th century poetry, maybe you want to find… etc).
They then help you retain what you read, and make sure that you don’t miss a trick.
Whether you read books so often that optimizing this is of huge value for you, or so rarely that when you do, you want to make it count, this book could make a real difference to your reading experience forever after.
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How Useful Is Peppermint, Really?
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Peppermint For Digestion & Against Nausea
Peppermint is often enjoyed to aid digestion, and sometimes as a remedy for nausea, but what does the science say about these uses?
Peppermint and digestion
In short: it works! (but beware)
Most studies on peppermint and digestion, that have been conducted with humans, have been with regard to IBS, but its efficacy seems quite broad:
❝Peppermint oil is a natural product which affects physiology throughout the gastrointestinal tract, has been used successfully for several clinical disorders, and appears to have a good safety profile.❞
However, and this is important: if your digestive problem is GERD, then you may want to skip it:
❝The univariate logistic regression analysis showed the following risk factors: eating 1–2 meals per day (OR = 3.50, 95% CI: 1.75–6.98), everyday consumption of peppermint tea (OR = 2.00, 95% CI: 1.14–3.50), and eating one, big meal in the evening instead of dinner and supper (OR = 1.80, 95% CI: 1.05–3.11).
The multivariate analysis confirmed that frequent peppermint tea consumption was a risk factor (OR = 2.00, 95% CI: 1.08–3.70).❞
~ Dr. Jarosz & Dr. Taraszewska
Source: Risk factors for gastroesophageal reflux disease: the role of diet
Peppermint and nausea
Peppermint is also sometimes recommended as a nausea remedy. Does it work?
The answer is: maybe
The thing with nausea is it is a symptom with a lot of possible causes, so effectiveness of remedies may vary. But for example:
- Aromatherapy for treatment of postoperative nausea and vomiting ← no better than placebo
- The Effect of Combined Inhalation Aromatherapy with Lemon and Peppermint on Nausea and Vomiting of Pregnancy: A Double-Blind, Randomized Clinical Trial ← initially no better than placebo, then performed better on subsequent days
- The Effects of Peppermint Oil on Nausea, Vomiting and Retching in Cancer Patients Undergoing Chemotherapy: An Open Label Quasi-Randomized Controlled Pilot Study ← significant benefit immediately
Summary
Peppermint is useful against wide variety of gastrointestinal disorders, including IBS, but very definitely excluding GERD (in the case of GERD, it may make things worse)
Peppermint may help with nausea, depending on the cause.
Where can I get some?
Peppermint tea, and peppermint oil, you can probably find in your local supermarket (as well as fresh mint leaves, perhaps).
For the “heavy guns” that is peppermint essential oil, here’s an example product on Amazon for your convenience
Enjoy!
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The Metabolism Reset Diet – by Alan Christianson
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The liver is an incredible organ that does a very important job, but what’s not generally talked about is how we can help it… Beyond the obvious “try to not poison it too much with alcohol, tobacco, etc”. But what can we do that’s actually positive for it?
That’s what Alan Christianson offers in this book.
Now, usually when someone speaks of a “four week cleanse” as this book advertises on its front cover, it’s a lot of bunk. The liver cleanses itself, and the liver and kidneys between them (along with some other organs and processes) detoxify your body for you. No amount of celery juice will do that. However, this book does better than that:
What it’s about, is not really about trying to do a “detox” at all, so much as supporting your liver function by:
- Giving your liver what it needs to regenerate (mostly: protein)
- Not over-taxing your liver while it does so
The liver is a self-regenerating organ (the mythological story of Prometheus aside, here in real life it can regenerate up to 80% of itself, given the opportunity), so whatever the current state of your liver, it’s probably not too late to fix it.
Maybe you’ve been drinking a little too much, or maybe you’ve been taking some meds that have hobbled it a bit (some medications strain the liver rather), or maybe your diet hasn’t been great. Christianson invites you to draw a line under that, and move forwards:
The book gives an overview of the science involved, and explains about the liver’s role in metabolism (hence the promised weight loss benefits) and our dietary habits’ impact on liver function. This is about what we eat, and also about when we eat it, and how and when our body metabolizes that.
Christianson also provides meal ideas and recipes. If we’re honest (and we always are), the science/principles part of the book are worth a lot more than the meal-plan part of the book, though.
In short: a great book for understanding how the liver works and how we can help it do its job effectively.
Click here to check out “The Metabolism Reset Diet” on Amazon today!
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