Hydrogen water is derived from infusing additional hydrogen gas (H2, also known as molecular hydrogen) into water at high pressure. The solubility of molecular hydrogen in water ranges from 0.5 ~ 1.6 mg/L.* The antioxidant power of H2 exceeds the equivalent amount (by volume or weight) of any other antioxidant substance. According to International Hydrogen Standards Association (IHSA), the recommended daily consumption for healthy individuals is a minimum of 500ml of Hydrogen water with 1-3 mg/litre of dissolved Hydrogen.