B vitamins can be confusing. There are eight of them, and some numbers are skipped. B vitamins consist of: B1, B2, B3, B5, B6, B7, B9, and B12. B12 (cobalamin) is usually the vitamin that gets all the ...

In the early 20th century, the deadliest nutrient-related disease in US history ravaged the American South. Pellagra, a disease caused by a deficiency in niacin and/or tryptophan, is marked by the ...