Antioxidants – This is the video on ANTIOXIDANTS which are require to protect body against toxix effects of free radicals along with NEET PG MCQs.

Definition of Antioxidants – 00:26 minutes
Mechanism of Action of Antioxidantv – 00:43 minutes
Types of Antioxidant System/ Classification of Antioxidant System – 01:20 minutes
Enzymes Antioxidant System/ Free radical scavenging enzymes – 01:35 minutes
Vitamins Antioxidant System/ Vitamins as antioxidants – 03:02 minutes
Vitamin E as an antioxidants – 03:36 minutes
Minerals antioxidant system – 04:26 minutes
Interrelationship between antioxidant system – 05:09 minutes
antioxidant paradox – 06:32 minutes
NEET PG MCQs – 07:32 minutes

Antioxidants are the compounds that protect the body against toxic effect of free radicals.
The protective mechanisms of antioxidants serve to scavange (remove) the free radicals.
Types of Antioxidant System
There are three main types of antioxidant systems:
1. Enzymes antioxidant system
2. Vitamins antioxidant system
3. Minerals antioxidant system
Enzymes Antioxidant System
Following antioxidant enzymes destroy the superoxide radical and H2O2.
The protective action of these enzymes need not be independent. They may function cooperatively.
1. Superoxide dismutase (SOD) (Chain Breaking Antioxidant)
2. Catalase
3. Glutathione peroxidase
Vitamins Antioxidant System
Few vitamins have antioxidant activity and help in detoxification of free radical. These vitamins are:
1. Tocopherol (vitamin E) (Most Powerful Chain Breaking Antioxidant)
2. β carotenes (vitamin A)
3. Ascorbic acid (vitamin C).

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