B vitamins

B vitamins

The B vitamins are eight water-soluble vitamins that play important roles in cell metabolism. Historically, the B vitamins were once thought to be a single vitamin, referred to as vitamin B (much like how people refer to vitamin C or vitamin D). Later research showed that they are chemically distinct vitamins that often coexist in the same foods. Supplements containing all eight are generally referred to as a vitamin B complex. Individual B vitamin supplements are referred to by the specific name of each vitamin (e.g. B1, B2, B3 etc ).

List of B vitamins

* Vitamin B1 (thiamine)
* Vitamin B2 (riboflavin)
* Vitamin B3 (niacin, includes nicotinic acid and nicotinamide)
* Vitamin B5 (pantothenic acid)
* Vitamin B6 (pyridoxine, pyridoxal, and pyridoxamine)
* Vitamin B7 (biotin), also known as vitamin H
* Vitamin B9 (folic acid), also, vitamin M
* Vitamin B12 (various cobalamins; commonly cyanocobalamin in vitamin supplements)

Former or unclassified vitamins

* "Vitamin B4 (adenine, DNA metabolite) is no longer classified as a vitamin because it is synthesized by the human body"]


External links

* [http://home.howstuffworks.com/vitamin-b.htm How B Vitamins Work] at HowStuffWorks

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