This document discusses antioxidants and various antioxidant-rich foods. It is authored by Dr. Hemraj Rana, an Ayurvedic physician. It defines free radicals and their causes like pollution, radiation, diet, stress etc. It explains that antioxidants can donate electrons to free radicals without becoming unstable themselves. Oxidative stress occurs from an imbalance between free radicals and antioxidants. It links several diseases to oxidative stress. The document discusses the antioxidant benefits of berries like strawberries, blueberries and blackberries. It also outlines the health benefits of amla, noni, aloe vera and recommends a daily dosage of the antioxidant supplement. It provides Dr. Rana's contact information for more details.