Common iron supplement side effects include gastrointestinal problems, decreased zinc absorption and interaction with certain ...

Is it safe to take a multivitamin daily for years? Here's what happens with long-term use, including potential benefits, risks, and how to choose the right one.

WASHINGTON - Over half of U.S. adults use multivitamins, mostly the pretty healthy people who also eat nutrient-fortified foods. Yet there's little evidence that most of the pills do any good - and ...