Antioxidants are the most essential compounds for human health and keep him alive longer. The modern style of life now causes a lot of troubles for human because of causing oxidative stress which it is the main cause of hard diseases such as caner, cardiovascular etc., and the strongest free radicals scavenger are antioxidants. these free radicals generated by oxidative stress, and they don't removed by medicines. The only way to scavenge these free radicals are antioxidants which they exist in plant food, vegetable, fruits etc. This book explain in details the mechanism of the action of antioxidants from our food in protecting our health.