You’ve heard the facts: The human body is made up of approximately 80% water. Water is made of hydrogen and oxygen. We need clean water to survive. But when it comes to your day-to-day life, are you getting enough water, or are you forcing your body to run on empty?

Without enough water, your body doesn’t function as well as it should. Some possible effects of drinking too little water include:

• Feeling tired
• Being unable to concentrate
• Lacking energy to do everyday activities
• Headaches

Many adults feel these symptoms every day, and don’t even realize that they’re really suffering from dehydration. Hydrating your body can make a huge difference in the way you feel—no prescriptions required.

Water needs vary for …