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https://www.researchgate.net/publication/335525839/figure/tbl2/AS:798008098705408@1567271365891/Correlation-between-age-vitamin-B12-folate-and-ferritin-levels-among-male-and-female.png For individuals with conditions that affect B12 absorption, such as pernicious anemia or gastrointestinal disorders, monitoring helps to track the progression of the disease and the effectiveness of treatment Variant:5AM-SINGLE gluten-free Can Vitamin B12 Deficiency Be a Sign of Cancer? | American Cancer Society
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