Did you know that 80% of the brain is made up of water! A good reason to keep hydrated for us to function like we all should. Not drinking enough water can affect concentration, cause foamy urine, give you a dry tongue, can cause headaches and even affect short-term memory. We can get water from food as well as from the tap. It is now seen as a myth that we need to drink 8 glasses of water a day if we eat enough fruit and vegetables. But people drink this much to feel good and give clear glowing skin.