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Supplementation Guidelines In addition to the RDA, here are some general recommendations for vitamin B12 supplementation based on age: Vitamin B12 deficiency child treatment Diagnosis : Confirm deficiency with blood tests measuring B12, homocysteine, and methylmalonic acid (MMA)

Pure substance principle

[DOI] [PubMed] [Google Scholar] 59.Kang YA, Choi HR, Na JI, et al

This makes it harder for seniors to get enough B12 from food, even if they eat enough
