Oxidative stress is an imbalance of free radicals and antioxidants in your body that leads to cell damage . It plays a role in many conditions like cancer, Alzheimer's disease and heart disease. Toxins like pollution and cigarette smoke can cause oxidative stress, while foods rich in antioxidants can help reduce it. Oxidative stress is a phenomenon caused by an imbalance between production and accumulation of oxygen reactive species (ROS) in cells and tissues and the ability of a biological system to detoxify these reactive products. ROS can play, and in fact they do it, several physiological roles (i.e., cell signaling), and they are normally generated as by-products of oxygen metabolism; despite this, environmental stressors (i.e., UV, ionizing radiations, pollutants, and heavy metals) and xenobiotics (i.e., antiblastic drugs) contribute to greatly increase ROS production, therefore causing the imbalance that leads to cell and tissue damage (oxidative stre ss )....
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