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  2. Is It Possible to Take Too Much B12? Here's What ... - AOL

    www.aol.com/lifestyle/possible-too-much-b12-here...

    Registered dietitians explain what vitamin B12 is, how much you need, and the potential side effects of taking too much.

  3. Vitamin B12 deficiency - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12_deficiency

    6% (< 60 years old), 20% (> 60 years old) [4] Vitamin B12 deficiency, also known as cobalamin deficiency, is the medical condition in which the blood and tissue have a lower than normal level of vitamin B 12. [5] Symptoms can vary from none to severe. [1] Mild deficiency may have few or absent symptoms. [1]

  4. Vitamin B12 - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12

    Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. [2] It is one of eight B vitamins. It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. [3]

  5. Pernicious anemia - Wikipedia

    en.wikipedia.org/wiki/Pernicious_anemia

    Frequency. 1 per 1000 people [8] Pernicious anemia is a disease where not enough red blood cells are produced due to a deficiency of vitamin B 12. [5] Those affected often have a gradual onset. [5] The most common initial symptoms are feeling tired and weak. [4]

  6. Vitamin B12 for Weight Loss: Does It Work? - AOL

    www.aol.com/lifestyle/vitamin-b12-weight-loss...

    One in particular, vitamin B12 supplements, are often touted as a solution for weight management. Since the dawn of the Internet (and probably well before), there have been several solutions sold ...

  7. Can Metformin Cause Hair Loss? - AOL

    www.aol.com/metformin-cause-hair-loss-115700854.html

    Vitamin B12 deficiency is associated with a number of problems, including weakness, weight loss, constipation and — yes — hair loss. ... some men who use Proscar also report side effects such ...