This Is What Happens to Your Body When You Drink a Gallon of Water a Day

Age-old stories and advice would have us believe drinking a gallon of water a day will solve every problem we have—from weight loss to anti-aging. But is it a myth? I can't imagine it would help much more than the frequency of my trips to the bathroom. So before trying it myself and subsequently carrying a gallon-size water bottle around with me all day, I decided to ask experts in fitness, nutrition, and skin what that water would really affect.

Turns out it's not a cure-all for any and every body-related issue. But there are a few surprising things that added hydration helps with, such as a faster metabolism, a better workout, and a clearer complexion. Below, top trainers, estheticians, and nutritionists discuss the truth behind the water bottle, including the answer to the question: Is drinking too much water bad for you?