5 Things That Might Happen if You Drink a Gallon of Water a Day 1. You’ll Have to Pee All the Time. This one isn't too shocking: Drinking more water will mean more frequent urination.

Many people follow the 8×8 rule, which recommends drinking eight 8-ounce (237-ml) glasses, or about half a gallon (1.9 liters), of water daily.

One gallon. 16 cups. It sounds like a lot, but considering that your body is made up of 60 percent water, it sort of makes sense that you'd need about that much to keep things running smoothly.

As for actual health benefits, well, I’m no scientist, but I have been drinking as close to a gallon of water each day as I can all month (it’s hard!), and I don’t feel all that different.

One small study, of 14 young adults, found drinking 500ml of water increased resting energy expenditure (the amount of calories our body burns before exercise) by about 24%. While this may sound ...

5 Things That Might Happen if You Drink a Gallon of Water a Day 1. You’ll Have to Pee All the Time. This one isn't too shocking: Drinking more water will mean more frequent urination.