<unk> s (; TCP) are a class of organic chemical compounds (more precisely, various methylated phenols), many of which have vitamin E activity. Because the vitamin activity was first identified in 1936 from a dietary fertility factor in rats, it was named<unk> , from Greek τόκος tókos 'birth' and φέρειν phérein 'to bear or carry', that is 'to carry a pregnancy', with the ending -ol signifying its status as a chemical alcohol. α-Tocopherol is the main source found in supplements and in the European diet, where the main dietary sources are olive and sunflower oils, while γ-tocopherol is the most common form in the American diet due to a higher intake of soybean and corn oil.<unk> otrienols, which are related compounds, also have vitamin E activity. All of these various derivatives with vitamin activity may correctly be referred to as "vitamin E".<unk> s and<unk> otrienols are fat-soluble antioxidants but also seem to have many other functions in the body.
Tocopherol
Cholic acid
Folate
Lipoic acid
Pyridoxine
Pantothenic acid
Riboflavin
Niacin