Ionized water that is both safe and functional Ionized water, which is produced by separating the water molecules of pure water into cationic and anionic levels, contains no impurities at all, unlike other similar cleansing cleaners. It does not even contain food additives such as preservatives and stabilizers, which are approved by the Ministry of Health, Labor, and Welfare for the safe supply of food in amounts that do not affect the human body. This is because food additives are also organic substances that are oxidized and decomposed by bacteria.