Oxidative stress in the outside world is the chemistry that causes things to rust. Inside your body, oxidative stress causes damage to the proteins that keep the cells and their membranes running. Glutathione protects your cells against free radicals that cause oxidative stress.
Free radicals, formed when oxygen interacts with molecules, must be neutralized or they will cause cells to “rust”, meaning they will die or perform poorly. Studies have shown that oxidative stress increases with aging, and over time, free radicals can lead to degenerative diseases: heart disease, memory problems, cancer, diabetes, arthritis.