Medically reviewed by Maggie Moon, MS, RD Vitamin B12 supports red blood cells, nerve health, and DNA production, with adults ...

From preventing anemia and shoring up energy to keeping you sharp and focused, there are many reasons why vitamin B12 is considered a key nutrient. Note: The U.S. Food and Drug Administration (FDA) ...

Your body needs vitamin B12 for maintaining metabolism, producing DNA and red blood cells, keeping the nervous system healthy, and more (1, 2). Fortunately, most people get enough of this ...

This essential vitamin is generally considered safe, even at high doses. However, most people get enough B12 through diet alone, and unnecessary supplementing may lead to negative side effects.

Research shows that some vitamins and minerals can interfere with sleep, especially if you're not taking the right amounts.

Vitamin B12 deficiency is behind most things you care about. For example, it supports the nervous system - a complex network that takes in information through your senses, processes the information ...