p‐Coumaric acid in cereals: presence, antioxidant and antimicrobial effects
2015
Boz, Hüseyin
Coumaric acid is a hydroxy derivative of cinnamic acid and naturally occurs in three isomers (ortho‐, meta‐ and para‐); p‐coumaric acid is one of the most commonly occurring isomer in nature. p‐coumaric acid, classified as a phytochemical and nutraceutical, is found in various edible plants, such as carrots, tomatoes and cereals. p‐coumaric acid (4‐hydroxy‐cinnamic acid) occurs widely in the cell walls of graminaceous plants. It decreases low‐density lipoprotein (LDL) peroxidation, shows antioxidant and antimicrobial activities and plays an important role in human health. It is found in the endosperm of kernels at a limited level; however, the amount of p‐coumaric acid increases significantly in peripheral tissues. In terms of cereal types, it appears that pericarp fractions in barley, wheat, oat and corn are the fractions richest in p‐coumaric acid. It is both a good antioxidant and a good antimicrobial; therefore, it is natural alternative instead of synthetic additives, nowadays.
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