Do you need to drink eight glasses of water a day to stay properly hydrated?

The idea that everyone needs to drink eight glasses of water a day to stay properly hydrated is a common myth. While drinking water is important for overall health, the amount needed varies from person to person based on factors such as age, weight, activity level, and climate.

The National Academies of Sciences, Engineering, and Medicine recommends a general guideline of about 3.7 liters (125 ounces) for men and 2.7 liters (91 ounces) of total water intake per day for women. This includes all sources of water, such as beverages and food.

However, this guideline is just a starting point, and individual needs may vary. Some people may need more water, especially if they are physically active, live in a hot climate, or are breastfeeding. Others may need less water if they are older or have certain medical conditions that affect their fluid intake.

In addition to drinking water, staying hydrated can also involve consuming other fluids such as tea, coffee, milk, juice, and sports drinks, as well as eating foods with high water content like fruits and vegetables.