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  1. Vitamin B-12 - Mayo Clinic

    Aug 13, 2025 · There's no proof that taking vitamin B-12 supplements or injections boosts energy or improves athletic performance. Most people get enough vitamin B-12 from a balanced diet. …

  2. Vitamin B12: Overview, Uses, Side Effects, Precautions ... - WebMD

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

  3. Vitamin B12 Dosage: How Much Should You Take per Day?

    Jun 9, 2025 · The ideal dose of vitamin B12 varies based on your sex, age, and reasons for taking it. This article examines the scientific evidence behind recommended dosages for B12 for …

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

    2 days ago · 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.

  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. 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.

  7. 5 Best B12 Supplements – Forbes Health

    Vitamin B12 is crucial for the body’s functioning, and not getting enough of it may lead to a range of symptoms and conditions, from weakness and fatigue to anemia and even dementia.

  8. Vitamin B12: MedlinePlus Medical Encyclopedia

    Vitamin B12 is a water-soluble vitamin. Water-soluble vitamins dissolve in water. After the body uses what it needs of these vitamins, leftover amounts leave the body through the urine. The …

  9. 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, …

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

    Oct 13, 2025 · Vitamin B12 is necessary for healthy blood cells and brain and nerve cell development. The RDA for vitamin B12 for adults 19 and older is 2.4 micrograms per day. …