Losing as little as 2% of your body’s water content can significantly impair physical performance.
Mild dehydration (fluid loss of 1-3%) can impair energy levels and mood, and lead to major reductions in memory and brain performance.
Drinking water can sometimes help relieve headache symptoms, especially in people who are dehydrated.
Drinking plenty of water can help prevent and relieve constipation, especially in people who generally do not drink enough water.
Increased water intake appears to decrease the risk of kidney stone formation. More research is needed in this area.
Hangovers are partly caused by dehydration, and drinking water can help reduce some of the main symptoms of hangovers.
Drinking plenty of water can help you lose weight. This is due to the fact that water can increase satiety and boost your metabolic rate. It is actually best to drink water cold, because then the body will use additional energy (calories) to heat the water to body temperature.