Tocotrienols encompass all the compounds that happen naturally occur at higher levels in numerous vegetable oils. These span across palm oil, rice bran oil, wheat germ, barley and certain other types of seeds, nuts and grains, as well as the oils derived from these.
The vitamin E family has two closely related groups encompassing them. These comprise four Tocotrienols categorized as alpha, beta, gamma, delta as well as four Tocopherols- similarly categorized as alpha, beta, gamma, delta. The crical and the signiﬁcant chemical structural diﬀerence between the two is that Tocotrienols have unsaturated isoprenoid side chains with three carbon-carbon double bonds. Tocopherols, on the other hand, possess saturated side chains.