Vitamin D pills ‘could stop colds or flu’

Vitamin D supplements could spare more than three million people from colds or flu each year, researchers claim according to BBC.

The sunshine vitamin is vital for healthy bones, but also has a role in the immune system.

The analysis, argues food should be fortified with the vitamin.

Vitamin D should be taken for improved bone and muscle health.

The immune system uses vitamin D to make antimicrobial weapons that puncture holes in bacteria and viruses.

But as vitamin D is made in the skin while out in the sun, many people have low levels during winter.

Trials on using supplements to prevent infections have given mixed results, so the researchers pooled data on 11,321 people from 25 separate trials to try to get a definitive answer.

The team looked at respiratory tract infections – which covers a wide range of illnesses from a sniffle to flu to pneumonia.

Overall, the study said one person would be spared infection for every 33 taking vitamin D supplements.

That is more effective than flu vaccination, which needs to treat 40 to prevent one case, although flu is far more serious than the common cold.

There were greater benefits for those taking pills daily or weekly – rather than in monthly super-doses – and in people who were deficient in the first place.

Why is vitamin D important?

Its main function is to regulate the amount of calcium and phosphate in the body, which are vital for the growth and maintenance of healthy bones, teeth and muscles.

In extreme cases, low levels can lead to rickets in children – where the bones become soft and weak and misshapen as they continue to grow.

In adults, vitamin D deficiency can lead to osteomalacia – causing severe bone pain and muscle aches.

But there is a balance – too much vitamin D can lead to high levels of calcium in the blood which can cause heart and kidney problems.

Anyone with a chronic condition or taking medication should seek advice from their doctor.

One of the researchers, Prof Adrian Martineau, said: that 70% have at least one acute respiratory infection each year, then daily or weekly vitamin D supplements will mean 3.25 million fewer people would get at least one acute respiratory infection a year.”

He already advises everyone to take vitamin D supplements in autumn and winter for the sake of healthy bones and muscles.

 They are recommended all year round for some people who get little sunlight on their skin.

However, there is considerable debate about the importance of the latest study.

Prof Louis Levy, the head of nutrition science, said: “The evidence on vitamin D and infection is inconsistent and this study does not provide sufficient evidence to support recommending vitamin D for reducing the risk of respiratory tract infections.”

But Prof Martin Hewison, said the findings were “striking”.

“I agree with the authors that this study supports a new indication for vitamin D beyond its established benefits for bone health,” he added.

And the research which funded the study, said the findings were “worthy of serious further debate”.

 Prof Martineau said: “Vitamin D fortification of foods provides a steady, low-level intake of vitamin D that has virtually eliminated profound vitamin D deficiency.

“By demonstrating this new benefit of vitamin D, our study strengthens the case for introducing food fortification to improve vitamin D levels in countries where profound vitamin D deficiency is common.”

 

N.H.Kh

 

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