Do you really need 8 glasses of water a day?

Hydration needs vary by person, diet, activity, climate, and overall health.

The "8 glasses" rule is a myth with no scientific basis—hydration needs vary by person, and food and other drinks count toward them.

Hydration needs are highly individual and are met through a variety of foods and beverages, not just plain water.

There's no universal requirement for eight glasses—hydration needs vary by person, climate, and diet, and much fluid already comes from food and other drinks.