Supplements Guide: Side Effects & Best Multivitamins

Vitamins and supplements like melatonin and fish oil offer health benefits but can cause side effects if misused. Learn about the impact of saw palmetto on blood pressure and find the best multivitamins for young women and adults over 50.

Vitamin B12 & Athletes

Published Jul,08 2011 | By Melissa Biscardi

The use of nutritional supplements by athletes for the purpose of improving performance is common. Commercial promotion of nutritional supplements claims a variety of performance-enhancing results. Typically, nutritional supplements have 100 percent to 500 percent of the daily recommended intake.

Melissa Biscardi has been writing health related articles since 2007. Her articles have appeared in such publications as "Alzheimer's Care Today" and "Topics in Geriatric Rehabilitation." Biscardi has a Bachelor of Science in nursing from Ryerson University in Toronto. She also completed a pre-doctoral internship focusing of prevention of neurotrauma in newborns at the Institute of Child Study.