Losing as little as 2% of your body’s water content can significantly impair your physical performance.
Mild dehydration (fluid loss of 1–3%) can impair energy levels, impair mood, and lead to major reductions in memory and brain performance.
Drinking water may help reduce headaches and headache symptoms. However, more high quality research is needed to confirm this potential benefit.
Drinking plenty of water may help prevent and relieve constipation, especially in people who generally don’t drink enough water.
Increased water intake appears to decrease the risk of kidney stone formation.
Hangovers are partly caused by dehydration, and drinking water can help reduce some of the main symptoms of hangovers.