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Vitamin E may have various roles as a vitamin. [1] Many biological functions have been postulated, including a role as a lipid-soluble antioxidant. [1] In this role, vitamin E acts as a radical scavenger, delivering a hydrogen (H) atom to free radicals. At 323 kJ/mol, the O-H bond in tocopherols is about 10% weaker than in most other phenols. [23]
α-Tocopherol (alpha-tocopherol) is a type of vitamin E.Its E number is "E307". Vitamin E exists in eight different forms, four tocopherols and four tocotrienols.All feature a chromane ring, with a hydroxyl group that can donate a hydrogen atom to reduce free radicals and a hydrophobic side chain, along with an aromatic ring is situated near the carbonyls in the fatty acyl chains of the ...
As a potent antioxidant, vitamin E protects cell membranes from oxidative damage, and its deficiency primarily affects tissues with high fatty acid content, especially the nervous system. Clinically, patients may present with spinocerebellar ataxia , polyneuropathy , muscle weakness, and retinopathy .
However, the roles and importance of the various forms of vitamin E are presently unclear, [98] [99] and it has even been suggested that the most important function of α-tocopherol is as a signaling molecule, with this molecule having no significant role in antioxidant metabolism.
Vitamin A acts as a regulator of cell and tissue growth and differentiation. Vitamin D provides a hormone-like function, regulating mineral metabolism for bones and other organs. The B complex vitamins function as enzyme cofactors (coenzymes) or the precursors for them. Vitamins C and E function as antioxidants. [7]
Pumpkin. Pumpkins are packed with fiber and plenty of antioxidant power in the form of carotenoids, vitamin C and other phytonutrients. And a study in The BMJ found that having higher levels of ...
Vitamin E was named "tocopherol" (from the Greek words tokos, meaning childbirth, and phero, meaning to bring forth) due to its presumed role in aiding conception. Subsequent research identified eight molecules in the vitamin E family, divided into tocopherols and tocotrienols: alpha, beta, delta, and gamma forms. [18]
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