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.

How Fast Will B-12 Work?

Published Sep,15 2011 | By Katie Strzeszewski

B-12 is a water-soluble vitamin that appears naturally in many animal-based foods. Vitamin B-12 controls your body’s ability to produce red blood cells and synthesize DNA, and it also impacts your neurological functioning.