Does drinking water help you lose weight?
The verdict
Modestly, yes. It helps most if you currently drink your calories or run under-hydrated.
Water before meals modestly reduces intake, especially if you run under-hydrated. Weak evidence.
Water is not a fat burner, and anyone selling it that way is overreaching. What the trials show is smaller and still useful: drinking water before meals modestly reduces how much people eat, and replacing caloric drinks with water removes calories directly.
The oldest performance drink on earth is also free, which makes it the cheapest upgrade in this entire game.
Do this instead
- Drink a glass before each meal. It is the one water habit with direct trial support.
- Carry a bottle. Availability beats intention.
- Every sugary drink you replace with water is a pure calorie win.
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GradeMyHabits grades everyday habits against published research. It is not medical advice. Talk to your doctor before changing medication, fasting beyond a day, or starting an intense program with a health condition.