Water is an essential nutrient that fulfils important functions in our bodies, such as the transport of nutrients, the elimination of waste products or the regulation of temperature. The daily water and liquids requirements set by the European Food Safety Authority (EFSA) are 2 to 2.5 liters per day for adult women and men respectively.
Normally one should drink between eight and ten glasses of liquid per day to maintain adequate hydration under normal conditions.
It is necessary to increase the requirements of fluids in times of heat or if we perform an intense physical exercise. There is a growing awareness among the population about the importance of being adequately hydrated throughout the day.
The most vulnerable population groups suffering from hypohydration are children, pregnant and lactating women and the elderly.
All non-alcoholic beverages containing more than 80% water and less than 50 mEq / l of salt are a source of hydration, which is especially relevant to specific environmental conditions of heat.
Dehydration can alter brain activity and functioning of certain neurotransmitter systems involved in the cognitive process, as well as hamper the permeability of the brain barrier.
Dehydration also impairs performance in exercise, sports particularly in warmer climates. Increasing daily water and fluid intake in patients with headaches.