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  1. Vitamin B12 Deficiency: Causes, Symptoms, and Treatment

    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. …

  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 …

  4. 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.

  5. 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.

  6. What Happens to Your Body When You Have a Vitamin B12 Deficiency

    Dec 9, 2025 · Signs of a vitamin B12 deficiency include anemia, neuropathy, and more. Vitamin B12 deficiency can cause symptoms of anemia, nerve problems, and sensory changes that …

  7. Recognizing and Treating Vitamin B12 Deficiency - Health

    3 days ago · Vitamin B12 deficiency causes fatigue, breathlessness, and pale skin. Autoimmune diseases and diet are common causes that require medical care.

  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. Vitamin B12 is the …

  9. Vitamin B12 Benefits, Potential Risks and If You're Getting Enough

    If you're considering a vitamin B12 supplement because of certain dietary restrictions, medical conditions or your age, this is what you need to know.

  10. Vitamin B12 Benefits and Side Effects: Dosage & Safety

    Aug 21, 2025 · Vitamin B12 (cobalamin) is an essential water-soluble vitamin that your body can’t make on its own. It supports core processes like red blood cell production, nerve protection, …