Are multivitamins dangerous?

Many of you have probably heard the recent press release on a study that links multivitamins with adverse health effects. There is, of course, a deeper side to the story which is pretty well summarized in this article: http://www.huffingtonpost.com/dr-mark-hyman/vitamin-dangers_b_1018430.html

A couple of key points :

Remember that correlation is not causation. There was an association, not a proven causal relationship. That takes a different study design.
Iron is a problem in anyone who doesn’t need it (anyone who does not menstruate basically).

Vitamins are not all the same. There are issues of quality involving synthetic vs. natural types, active forms of B vitamins, contamination by heavy metals, inaccurate label claims, on and on.

The truth is that there are common nutritional deficiencies in most people’s diets and a huge body of research supporting the clinical use of nutrients to enhance health.

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