Our bodies are made up of 70% water, so it is critical to every bodily function, including brain function. The effect on your brain of dehydration happens really quickly, too, with researchers determining that even just two hours of heavy exercise without water can cause cognitive decline. In studies, it was found that dehydration impacted functions like complex problem-solving, coordination, and attention the most.
You don’t have to stress about drinking a certain amount every day, but pay attention to your thirst as it is an excellent indicator of the need for water. Try to drink consistently throughout the day to keep levels steady and your brain happy.