How a Glass of Water Can Help You Lose Weight

By Amanda Doyle
Reviewed by Claudia Levi, R.N.
August 28, 2025

If you’re looking for weight management strategies that are simple and straightforward, look no further than your kitchen tap. Past research suggests that people who drink water regularly and stay well hydrated throughout the day tend to eat less and consume fewer calories.

Other research suggests that drinking a glass of water directly before a meal — regardless of your hydration throughout the day — can help you eat smaller portions and fewer calories while feeling just as full as if you ate a larger, more calorie-dense meal.