Water contained in blood and in all cells of the organism and around it, is the most importance and essential substance for human life and the environment where all body reactions take place. Water keep the acids balance, regulate the blood pressure and body temperature and frees the organism from impurities.

To drink enough water every day is necessary (1,5 to 2 litres) to keep the hydration levels and a good health. However, an excessive water consumption may be harmful. In anorexic conditions, for instance, and believing the myth that drinking plenty litres of water makes you thinner, people underweight may be intoxicated due to the excessive consumption of this liquid, since it leads to the sodium reduction in the body, something that, in the end, may be a cause of death.