Page 111 - phytochemistry II -pharmD general

antioxidant This reaction produces oxidized α-tocopheroxyl radicals that can
be recycled back to the active reduced form through reduction by other
antioxidants, such as ascorbate, retinol. Vitamin E scavenges peroxyl radical
intermediates in lipid peroxidation and responsible for protecting Poly
Unsaturated Fatty Acid (PUFA) present in cell membrane and density
lipoprotein (LDL), against lipid peroxidation. A fat-soluble vitamin that can be
stored with fat in the liver and other tissues.
Functions of vitamin E: maintains normal conditions of cells, and healthy skin
and tissues, Protects red blood cells, antioxidation and enhance immunity.
Sources of vitamin E: wheat germ, nuts, seeds, whole grains, green leafy
vegetables, vegetable oil and fish-liver oil.

Phenolic phytochemicals
Polyphenols comprise a wide variety of molecules that have a polyphenol
structure (i.e., several hydroxyl groups on aromatic rings), but also molecules
with one phenol ring, such as phenolic acids and phenolic alcohols.
Polyphenols are divided into several classes, according to the number of
phenol rings that they contain and to the structural elements that bind these
rings to one another.
Current evidence strongly supports a contribution of polyphenols to the
prevention of cardiovascular diseases, cancers and osteoporosis and

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