6 Reasons to Drink More Water

Your brain needs a lot of oxygen to function at optimum levels, so drinking plenty of water ensures that it's getting all it needs. In fact, drinking eight to 10 cups of water per day can improve your levels of cognitive performance by as much as 30 percent.
The door swings both ways: Research shows that a dehydration level of just 1 percent of your body weight reduces thinking functions, so staying well-hydrated is super important for your mental performance .