When you buy a bottle of vitamins from a nutrition store, you’ll probably notice a best-by date on the bottom of the jar. But that inscribed number isn’t a hard-and-fast rule—there is some nuance to ...

Add Yahoo as a preferred source to see more of our stories on Google. Witthaya Prasongsin/Getty Images When on a cleaning spree, you may sometimes find bottles and supplements that have passed their ...

Taking too much vitamin B6 can cause nerve damage and numbness in hands and feet. Niacin at high doses can cause flushing and ...