7 years ago
2
Vitamin D supplements may prevent millions of winter infections
Taking vitamin D could lead to 3 million fewer respiratory infections – like colds and flu – in the UK every year, but some say the evidence isn’t clear
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https://www.newscientist.com
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So, might as well pass the salt as there is no sure thing here.
No-one can patent Vitamin D, so it's just not that interesting.