Oxidation reactions in the body can produce free radicals, while antioxidants terminate these reactions. Elevated rates of oxidants and insufficient antioxidants in the body cause oxidative stress. A constant supply of external sources of antioxidants should be part of one‘s daily diet, to reduce oxidative stress and related damage. This is why everyone should not only care about the quantity of the water we drink, but also about the quality. Both are essential for our wellbeing.