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The daily dose most likely to prevent harmful side effects in the general population is known as a Tolerable Upper Intake Level (UL)
Bradshaw WG, Baum MJ, Awh CC
J Clin Endocrinol Metab (2010) 95(5):2195202
There are many varieties of the vitamin, including: B1 (thiamine) B2 (riboflavin) B3 (niacin) B5 (pantothenic acid) B6 B7 (biotin) B12 Folic acid Food is the best source of this nutrient
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