Vitamin B12 is a vital nutrient with numerous health benefits. Learn more about what it does in the body and how to get enough of it.

Vitamin B12 deficiency develops gradually and affects both the blood and nervous system. It causes anemia, fatigue, numbness, ...

Pitcher Roger Clemens is feeling the heat. A former trainer has said he injected the seven-time Cy Young winner with steroids and human growth hormone, but Clemens says the only injections he received ...

It's the latest celebrity craze, with everyone from Madonna and Victoria Beckham to Justin Timberlake and Katy Perry supposedly getting a boost from vitamin B12. But what does it do, and do you need ...

Medically reviewed by Lindsay Cook, PharmD The recommended intake of vitamin B12 for people older than 14 is 2.4 micrograms a ...

Ever get that tingly feeling in your feet and hands? Are you a little more tired than usual? Unusually fatigued? Does even your brain feel drained? Have a migraine headache, too? It could be you're ...

This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. Since the dawn of the Internet (and probably well before), there have been several solutions sold for weight management — including ...

Posh claims it kept her in her usual incredible shape throughout pregnancy, while Chelsea Handler suggested it gave her libido a boost. Others have been known to use injections to help boost their ...