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  1. 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 …

  2. 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.

  3. Signs and Symptoms of Vitamin B12 Deficiency - Healthline

    Dec 14, 2023 · Vitamin B12 is an essential nutrient that your body needs for processes like DNA synthesis, energy production, and central nervous system function (1). Studies suggest that up to …

  4. 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 …

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

    Aug 21, 2025 · 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.

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

    Dec 28, 2025 · Andrews: Vitamin B12 supports your body's natural processes of energy production, such as the metabolism of carbs, protein, fats, and ultimately ATP (adenosine triphosphate). ATP is …

  7. How Much Vitamin B12 Should I Take Per Day? - GoodRx

    Feb 2, 2026 · You can get vitamin B12 from your diet or take it as a supplement. Learn how much vitamin B12 you should take per day and if it’s possible to take too much.

  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 largest and …

  9. Vitamin B12 - Health Professional Fact Sheet

    Vitamin B12 overview for health professionals. Research health effects, dosing, sources, deficiency symptoms, side effects, and interactions here.

  10. What Happens to Your Body When You Take Vitamin B12 - EatingWell

    Oct 13, 2025 · Vitamin B12 is a water-soluble vitamin that contains the mineral cobalt, and is sometimes called cobalamin. It is naturally found in many animal-based foods and is added to fortified foods, like …