Harvard Health Letter

The importance of staying hydrated

Stay hydrated gradually, throughout the day. Drink fluids, or eat water-rich foods.

Images: Thinkstock

A healthy person needs 30 to 50 ounces of fluid per day.

Drinking fluids is crucial to staying healthy and maintaining the function of every system in your body, including your heart, brain, and muscles. Fluids carry nutrients to your cells, flush bacteria from your bladder, and prevent constipation.

To continue reading this article, you must login.
  • Research health conditions
  • Check your symptoms
  • Prepare for a doctor's visit or test
  • Find the best treatments and procedures for you
  • Explore options for better nutrition and exercise
Learn more about the many benefits and features of joining Harvard Health Online »