Magnesium is a popular supplement for sleep, but doctors say you should avoid combining it with over-the-counter sleep aids.

IF YOU KNOW anyone who's deficient in a B vitamin, you may see them taking a vitamin B-complex supplement. They're being touted as a cure to all your vitamin B related needs—but do you really need it?

Medically reviewed by Sohaib Imtiaz, MD Beef is an excellent source of vitamin B12 (cobalamin). Roasted or cooked boneless beef loin weighing about 114 grams, which is the amount people usually eat in ...

Vitamin B12 is typically well-tolerated, but in very rare cases, there are serious side effects to be aware of. Learn more about them here.

Vitamin B12 shots and supplements are popular among those looking for a quick fix for weight loss. In fact, some even claim that increasing your intake of vitamin B12 can help fight fatigue, boost ...