Researchers analyzing hundreds of studies say vitamin D supplements won’t protect healthy, middle-aged adults from osteoporosis. And even worse, they say the supplements may increase the risk of death from other diseases.
From multivitamins and melatonin to fiber and fish oil, Americans who are trying to boost their health and immunity have a plethora of supplements to choose from. An estimated 58% of U.S.
Figuring out all the factors that can affect a person's vitamin D levels is complicated.