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  2. 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. [151] Vitamin B 12 deficiency can be found within normal levels, so clinical symptoms should be taken into account when a diagnosis is made. [2]

  3. Vitamin B12 Is a Power Nutrient. Here's How to Know If ... - AOL

    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 ...

  4. 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.

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

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

    The Good Housekeeping Institute tested more than 30 brands of B12 supplements, and chose Nature made B12 1000mcg as the best overall option, and Garden of Life Vitamin Code Raw B12 as the best ...

  6. These High-Quality Vitamin B12 Supplements Can Help ... - AOL

    www.aol.com/lifestyle/high-quality-vitamin-b12...

    The following vitamin B12 supplements all feature highly-absorbable forms of the vital vitamin. Keep reading on to find out if you are showing signs of B12 deficiency and if a supplement is right ...

  7. Vitamin B12 - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12

    [6] [15] [26] Vitamin B 12 deficiency can also cause symptoms of mania and psychosis. [27] [28] Among other problems, weakened immunity, reduced fertility and interruption of blood circulation in women may occur. [29] The main type of vitamin B12 deficiency anemia is pernicious anemia, [30] characterized by a triad of symptoms: