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  2. 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 ]

  3. The Top Signs You Have a Vitamin B12 Deficiency - AOL

    www.aol.com/top-sign-vitamin-b12-deficiency...

    Symptoms “A B12 deficiency can cause physical and neurological symptoms, and research is also growing to support that it can also cause psychological issues as well,” says Shapiro.

  4. 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. Skip to main content. 24/7 Help. For premium support please call: 800 ...

  5. 12 Foods That Can Cause a Headache or Migraine - AOL

    www.aol.com/12-foods-cause-headache-migraine...

    2. Chocolate. Here’s yet another of the fine things that make life nice, but is actually bad news. That chocolate bar you had may be the cause of that throbbing headache you have.

  6. 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]

  7. 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]