Michael Mosley doesn't believe in supplements except for one

According to Michael Mosley, you can get most of what you need from a healthy diet. That is why, on the whole, he doesn't believe in vitamins and supplements.

However, there is one he counts as an exception to that rule, and he has admitted he takes it all year round. For the TV doctor, the one vitamin that is worth your while is vitamin D.

According to the NHS, vitamin D helps regulate the amount of calcium and phosphate in the body. These are needed to keep our bones, teeth and muscles healthy.

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As we get older, a deficiency in vitamin D can cause bone pain. The official advice is that everyone should consider taking a daily vitamin D supplement during the autumn and winter.

This is the advice that Mr Mosley previously followed, but has recently upped it to take one every day throughout the whole year. He wrote in his column in the Daily Mail: "I eat a lot of oily fish and eggs, both rich in vitamin D, and I also go outside for lots of walks, so my vitamin D levels should be well topped up. However, this year I am going to keep taking those supplements."

He went on to justify his decision by citing research studies on ageing, explaining: "That's partly because, surprise surprise, each year I get older and studies have shown that as we age our bodies become less effective at absorbing vitamin D from food and our skin also becomes less efficient at converting sunlight into this nutrient." For the latest health and Covid news, sign up to our newsletter here

Recent studies also suggests the supplement may also play a key role in reducing and preventing the risk of diseases like dementia and colon cancer. He said: "That, and the fact older people tend to spend more time indoors or in the shade, means that vitamin D deficiency is very common in the over 60s, even in the summer months, particularly if you have darker skin."

Dr Mosley said the advice on how much you take differs. The NHS recommends 10 micrograms (mcg) - or 400 international units (IU) of vitamin D a day. He said the National Institutes of Health in the US recommends 15 mcg - and 20 mcg if you're over 70.

But he added: "I take 25 mcg (1,000 IU), which is within the limits of what's considered safe (anything under 100 mcg a day for adults or 50 mcg for children, according to the NHS) but closer to the sort of doses studies show you need to take to ward off infections, cancers, and maybe even dementia."