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

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

    Look for these warning signs of vitamin B12 deficiency. You could be experiencing both mental and physical symptoms. ... or completely vegan, there is one potential complication you need to watch ...

  3. How to recognize the signs and symptoms of vitamin B12 ... - AOL

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    Vitamin B12 deficiency causes symptoms like fatigue, poor memory, a swollen tongue, and canker sores. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...

  4. Vitamin B12 Is a Power Nutrient. Here's How to Know If You're ...

    www.aol.com/vitamin-b12-power-nutrient-heres...

    Running a vitamin B12 deficit puts you in danger of fatigue, anemia, muscle weakness, and even symptoms of depression. But don’t let supplement companies try to sell you on a megadose of vitamin ...

  5. Vitamin B12 deficiency - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12_deficiency

    Vitamin B 12 deficiency can be determined, but not always. [14] This means it measures forms of vitamin B 12 that are "active" and can be used by the body, as well as the "inactive" forms, which cannot. [150] Vitamin B 12 deficiency can be found within normal levels, so clinical symptoms should be taken into account when a diagnosis is made. [2]

  6. Pernicious anemia - Wikipedia

    en.wikipedia.org/wiki/Pernicious_anemia

    Neuropsychiatric symptoms can precede hematological signs and are often the presenting manifestation of the disease. [55] Vitamin B 12 serum levels are used to detect its deficiency, but do not distinguish its causes. Vitamin B 12 levels can be falsely high or low and data for sensitivity and specificity vary widely.

  7. Vitamin B12 - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12

    [2] [4] Plants do not need cobalamin and carry out the reactions with enzymes that are not dependent on it. [5] Vitamin B 12 is the most chemically complex of all vitamins, [6] and for humans the only vitamin that must be sourced from animal-derived foods or supplements. [2] [7] Only some archaea and bacteria can synthesize vitamin B 12. [8]