Watch Out: Another mark against vitamin D

So here’s yet another mark against supposed benefits from extra vitamin D.

Observational studies have shown that low vitamin D levels are linked to a higher risk of upper respiratory infections in kids, particularly colds.

Ergo, some in the very populated vitamin D crowd have concluded, bring kids’ vitamin D levels up with artificial means such as high-dose vitamin D supplements, and you will reduce the number of colds kids get.

But according to a recent study in JAMA, that didn’t happen for a group of Canadian kids who were given high doses of vitamin D.

These researchers saw no effect on number of colds, number of sick days, nada.

And if it doesn’t work in high-risk kids, why does anyone think it will do much for adults?

Just asking.