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  1. 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.

  2. 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 …

  3. 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 …

  4. 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.

  5. Vitamin B12 - Consumer - Office of Dietary Supplements - Vitamin B12

    Vitamin B12 helps keep nerve and blood cells healthy. Learn how much you need, good sources, deficiency symptoms, and health effects here.

  6. We Asked a Doctor What Vitamin B12 Actually Does for Your Body

    3 days ago · 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, …

  7. 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. Vitamin B12: Purpose, benefits, and sources - Medical News Today

    Jun 11, 2025 · Vitamin B12 (cobalamin) is essential for the health of nerve tissue, brain function, and red blood cells. Sources include meat, eggs, and some yeast products.

  9. Vitamin B12 - The Nutrition Source

    Vitamin B12, or cobalamin, is naturally found in animal foods. It can also be added to foods or supplements. Vitamin B12 is needed to form red blood cells and DNA. It is also a key player in the …

  10. Vitamin B12 Deficiency: Symptoms, Causes & Treatment

    Sep 30, 2025 · Vitamin B12 deficiency is a treatable condition that happens if you aren’t consuming enough vitamin B12 in your diet or if your body isn’t absorbing it properly. Vitamin B12 deficiency can …