How much water should I drink per day to lose weight?

Water really does help with weight loss, but not in a magical way - it works more as a supporting tool. When you drink water before eating, your stomach fills up a bit and you end up eating less. Plus your metabolism speeds up slightly when your body processes water. But if you're gonna drink liters of water while eating fast food at the same time, the pounds won't go away - what matters is the overall picture with diet and activity.

How much water you need depends on a bunch of factors: your weight, climate, activity level. People often hear about "2 liters a day," but that's pretty rough. It's easier to go by thirst and urine color - if your urine is light, it means your body's getting enough fluids. If you're exercising or living in a hot climate, you need to drink more.

Practically speaking: try drinking a glass of water 15-20 minutes before your main meals, it really does reduce appetite. And the rest of the time, drink when you're thirsty, don't force yourself. The main thing is water doesn't replace diet and exercise, it just complements them.

Water itself doesn't burn fat, but here's what actually works: when you drink before eating, you feel full faster and eat less. The real catch is that a lot of people start drinking water instead of actual food and then crash from hunger - that leads to binge eating and gaining the weight back. Drink enough so your urine is almost clear, but that's not a replacement for a proper diet, it's just a helper. And keep in mind that if you have kidney or heart problems, it's better to check with a doctor before you start upping your intake.