
Vitamin B12 Deficiency: Causes, Symptoms, and Treatment - WebMD
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 B-12 - Mayo Clinic
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 …
Vitamin B12 - Wikipedia
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 …
Vitamin B12 - Consumer - Office of Dietary Supplements
Vitamin B12 helps keep nerve and blood cells healthy. Learn how much you need, good sources, deficiency symptoms, and health effects here.
Vitamin B12: MedlinePlus Medical Encyclopedia
Vitamin B12, like the other B vitamins, is important for protein metabolism. It helps in the formation of red blood cells and in the maintenance of the nervous system.
What Happens to Your Body When You Take Vitamin B12 - EatingWell
Oct 13, 2025 · Vitamin B12 is essential for numerous body functions. Read on for what vitamin B12 is, the benefits, potential risks, side effects and more.
8 Foods Naturally High in Vitamin B12 - Verywell Health
Dec 15, 2025 · Vitamin B12 supports energy, red blood cell formation, nerve function, and DNA production. A deficiency can cause fatigue, weakness, headaches, and trouble concentrating. …