Taking too many vitamins and supplements may cause health problems, including vitamin toxicity, interactions, gastrointestinal distress, and kidney damage.

Plus, which ones you should never take together.

Supplements may seem harmless, but experts warn that overdoing them can lead to real health risks—and subtle warning signs ...

Add Yahoo as a preferred source to see more of our stories on Google. Overwhelmed by too many toys? Why the kiddie clutter is bad for families' mental health — and what to do about it. (Photo ...