Are you dehydrated? So how much is enough? About six to eight glasses of water a day, according to the the British Dietetic Association and more in hot weather or after exercise. Less than that and you can become dehydrated, a condition that can lead to dizziness, fatigue, headaches and constipation. Dehydration can also affect the ability to concentrate: remember the brain is about 78% water, after all.
People who have adequate intake of water say they feel fresher and have fewer headaches.
The symptoms of dehydration can be hard to spot, but the most common signs include:
- Thirst – fatigue/lethargy
- Very dark yellow urine
- Poor concentration
- Dry skin