Drinking water boosts brain power
Drinking water can help boost your brain's processing power and reaction time, according to new research from the University of East London and the University of Westminster. The study concluded that drinking water when you feel thirsty can not only raise the brain’s performance level on mental tests, but also can boost mood—people were found to be more tense, sad and confused when dehydrated.
In this study, 34 participants were given mental tests, either after eating a cereal bar and drinking a glass of water or just eating the cereal bar without the water. They were assessed via three measurements – a thirst scale, a mood scale and a computer-administered scale that measured reaction time, verbal recognition memory, visual memory and learning. Those who drank three cups of water before completing the test had a 14 percent increased reaction time, which the study authors used as evidence that water can increase cognitive performance.
But before you run out and start guzzling H2O, know that the study also found that drinking water can have negative effects as well. Some participants who drank water before an "attention flexibility" test using visual imagery scored lower than those who did not drink water.