Question

Which of the vitamins listed below does not exhibit anti-oxidant activity

• A. Vitamin E
• B. Vitamin D
• C. Vitamin C
• D. \(\beta\)-carotene

Hint:

Antioxidant Vitamins ACE: Vitamin A ($\beta$-carotene), Vitamin C (Ascorbic acid), Vitamin E (Tocopherol). Vitamin D regulates Calcium absorption.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Nutritional antioxidants scavenge reactive oxygen species (ROS) and inhibit free radical lipid peroxidation chain reactions in biological tissues.

Step 2: Detailed Explanation:
Evaluating the antioxidant properties of vitamins:
1. Vitamin E (Tocopherols): Major fat-soluble chain-breaking antioxidant protecting cell membrane lipids against peroxidation.
2. Vitamin C (Ascorbic Acid): Primary water-soluble antioxidant scavenging aqueous free radicals and regenerating oxidized vitamin E.
3. \(\beta\)-Carotene (Provitamin A): Potent carotenoid singlet oxygen and radical quencher.
4. Vitamin D (Calciferol): Functions in calcium-phosphate homeostasis and bone mineralization, not as a direct biological antioxidant.

Step 3: Final Answer:
Therefore, Vitamin D does not exhibit direct antioxidant activity, corresponding to option (B).