Of all the health benefits, the most prominent is the antioxidant property of hydrogen. Oxidative stress is caused by free radicals in your cells. Free radicals are unstable atoms that constantly search for other atoms to bind. They attack molecules in the mitochondrion — the energy center of the cell — and other vital organelles in the cells. By damaging all the important machinery of a cell, it halts its growth as well as normal functioning. Free radicals are either produced by our cells as a by-product of metabolism or by air pollutants, X-rays exposure, cigarette smoking, and industrial chemical wastes. They are a major cause of disease and inflammation in your body. Persistent oxidative stress leads to severe diseases including cancer. Hydrogen (H2) neutralizes free radicals in the cell. Each hydrogen molecule destroys two free radicals produced during day-to-day stress. The positive anti-oxidant response has been reported in different scientific studies. For example, a study investigated the beneficial effects of hydrogen water in patients undergoing radiotherapy against liver cancer. The results indicated that people who consumed hydrogen-rich water had lower levels of free radicals in their blood³.