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Does Drinking More Water Help You Lose Weight? What Science Says

Editorial
6 min read
2026-02-28
Does Drinking More Water Help You Lose Weight? What Science Says

Does Drinking Water Help You Lose Weight?

Can something as simple as drinking water help with weight loss? The scientific evidence is actually promising.

Study 1: Thermogenic Effect of Water

A study in the Journal of Clinical Endocrinology & Metabolism showed: 500 ml of water increases energy expenditure by about 30% for 30-60 minutes. This is due to the thermogenic effect -- the body needs to warm the water to body temperature.

Study 2: Water Before Meals

Participants in a study who drank 500 ml of water 30 minutes before meals consumed an average of 75 fewer calories per meal. Over 12 weeks, this led to 2 kg more weight loss compared to the control group.

Study 3: Water Instead of Sugary Drinks

Replacing sugary beverages with water saves an average of 200-300 calories per day. This alone can lead to weight loss of 0.5-1 kg per month.

How Water Helps With Weight Loss

1. **Appetite suppressant:** A glass of water before meals fills the stomach and reduces food intake

2. **Metabolism booster:** Cold water slightly increases calorie burn (approx. 50-100 kcal/day with 2 liters)

3. **Sugar substitute:** Water instead of soft drinks or juice saves significant calories

4. **Better fat burning:** Well-hydrated cells metabolize fat more efficiently

The Optimal Drinking Strategy for Weight Loss

- Morning: 500 ml lukewarm water after waking up

- Before every meal: 500 ml water (30 min. beforehand)

- Between meals: regular small amounts

- Evening: 250 ml, but not too close to bedtime

Conclusion

Drinking water alone won't make you slim. But as part of a healthy diet, adequate hydration can measurably support the weight loss process. Our water intake calculator helps you determine your optimal needs.