Apr 30, 2017 · Vitamin B12 is essential for good health, but some people may not be getting enough. WebMD tells you about symptoms of a vitamin B12 deficiency and how it can be treated.

Vitamin B12, also known as cobalamin or extrinsic factor, is a water-soluble vitamin involved in metabolism. [2] One of eight B vitamins, it serves as a vital cofactor in DNA synthesis and both fatty …

Aug 13, 2025 · Vitamin B-12 is a vitamin the body uses to make and support healthy nerve cells. It's also used to make healthy red blood cells and the genetic material inside cells called DNA. Vitamin B-12 …

Learn more about Vitamin B12 uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Vitamin B12.

Oct 7, 2017 · Vitamin B12 is an important water-soluble vitamin that many people are deficient in. Here are nine signs and symptoms of vitamin B12 deficiency.

Jun 4, 2026 · Vitamin B12 is an essential nutrient. Here are the best food sources of vitamin B12, as well as fortified alternatives for vegetarian or vegan diets.

Feb 17, 2026 · Vitamin B12 is an essential nutrient your body can’t make, so you must get it from your diet or supplements. Here are 12 foods that are high in vitamin B12.

Apr 30, 2026 · Learn vitamin B12 benefits, who may need it, whether it boosts energy, dosage for adults and seniors, B12 shots, side effects, and what high B12 levels mean.

Apr 16, 2026 · Q: Why is vitamin B12 important for the body, and how do we know when we have a B12 deficiency? Andrews: Vitamin B12 supports your body's natural processes of energy production, …

Vitamin B12 deficiency, sometimes called cobalamin deficiency, happens when your body is either not getting enough or not absorbing enough vitamin B12 from the foods you eat. Vitamin B12 is an …