メチル基の位置によって8つの異なる型があり、それぞれの生物学的機能をもつ。
ヒトではD-α-トコフェロールがもっとも強い活性をもち、主に抗酸化物質として働くと考えられている。
抗酸化物質としての役割は、代謝によって生じる|フリーラジカルから細胞を守ることである。
フリーラジカルはDNAやタンパク質を攻撃することでガンの原因ともなりうる。

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100% Natural Vitamin E 400 IU

Vitamin E is a major antioxidant and the primary defense against lipid peroxidation.
It is particularly important in protecting the body`s cells from free radical / oxidative damage.

Vitamin E is the collective name for a set of 8 related tocopherols and tocotrienols, which are fat-soluble vitamins with antioxidant properties

It has been claimed that α-tocopherol is the most important lipid-soluble antioxidant, and that it protects cell membranes from oxidation by reacting with lipid radicals produced in the lipid peroxidation chain reaction. This would remove the free radical intermediates and prevent the oxidation reaction from continuing. The oxidised α-tocopheroxyl radicals produced in this process may be recycled back to the active reduced form through reduction by other antioxidants, such as ascorbate, retinol or ubiquinol.

The functions of the other forms of vitamin E are less well-studied, although γ-tocopherol (also written as gamma-tocopherol) is a nucleophile that may react with electrophilic mutagens, and tocotrienols may have a specialized role in protecting neurons from damage. However, the roles and importance of the various forms of vitamin E are presently unclear, and it has even been suggested that the most important function of vitamin E is as a signaling molecule, and that it has no significant role in antioxidant metabolism.

Most studies about Vitamin E have supplemented only alpha-tocopherol, but doing so leads to reduced serum gamma- and delta-tocopherol concentrations. For more info, read article tocopherol.

1 IU of vitamin E is the biological equivalent of about 0.667 mg d-alpha-tocopherol (2/3 mg exactly), or of 1 mg of dl-alpha-tocopherol acetate.


Directions:
As a dietary supplement, take one softgel daily, preferably with a meal.