Oxidative stress is an imbalanced state in which free radicals (reactive oxygen species) exceed levels which are required for normal cell function and overwhelm endogenous antioxidant capacity and repair (Nordberg and Arner, 2001; Patel, 2002). Oxidative stress damages cell components including DNA, proteins, and lipids. In humans, it contributes to atherosclerosis, heart failure, cancer, Alzheimer’s disease, and aging.

Antioxidants found in foods, especially in plant foods, can delay or inhibit …

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