For reference, these are the Recommended Dietary Allowances (RDA) for vitamin B12 by sex and age group indicating the daily amount needed for healthy individuals ( Men 1418: 2.4 mcg Men 19+: 2.4 mcg Women 1418: 2.4 mcg Women 19+: 2.4 mcg During pregnancy: 2.4 mcg During lactation: 2.8 mcg SUMMARY The RDA for vitamin B12 for most people is 2.4 mcg per day
The same studies can be located independently on PubMed using the CAS number (221231-10-3) or the compound name
Get the details about this, as well as risks from too much folic acid, in the Folic Acid section of our B Vitamin Supplements Review, which includes our Top Picks for folic acid and folate, and other B vitamins
How Does Treatment Duration Differ
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[7] [9] Caution is advised in individuals with renal insufficiency or those on dialysis, as impaired clearance may increase the risk of accumulation and toxicity