Which of the following is/are a dietaryantioxidant(s)?
A. Vitamin C
B. Lipoic acid
C. Vitamin K
D. Beta-carotene
E. Vitamin E
Ans. A,B,D,E
Dietary antioxidants include the micronutrients vitamin C, vitamin E,
beta-carotene and the polyphenols. Beta-carotene and vitamins E and C have been
well studied, possess strong antioxidant activities and are well absorbed, with
a relatively high bioavailability. On the other hand, the polyphenols are a
complex family of molecules, ubiquitous in plants, and include the flavonoids
and phenolic acids.Commonly occurring flavonoids are quercetin derivatives
(onion, apple), catechins (tea), anthocyanins (berries) and hesperitin
derivatives (citrus fruits), while commonly occurring phenolic acids are
caffeic acid, occurring in many fruit and vegetable and chlorogenic acid
(coffee).
