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Drink a glass of water before meals

In a 12-week study, adults who drank 500 ml of water before each meal lost about 2 kg more. A simple habit worth trying.

2026-10-13 · 3 min read

Some of the best habits are also the simplest. Drinking water before you eat is one of them.

Drink a glass of water before meals

What the study showed

Adults on a reduced-calorie diet were split into two groups. One group drank 500 ml of water before each main meal. After 12 weeks, they had lost about 2 kg more than the group that didn't.

Why it may work

  • Water takes up space in your stomach, so you may eat a little less.
  • Thirst is easy to mistake for hunger.
  • Choosing water instead of a sugary drink saves calories too.

How to make it a habit

  • Keep a bottle on your desk or in your bag.
  • Drink a glass while you wait for food to cook or arrive.
  • Add lemon, cucumber or mint if plain water feels boring.

Note: if you have a heart or kidney condition, ask your doctor how much fluid is right for you.

Sources

  • Dennis EA et al. Water consumption increases weight loss during a hypocaloric diet intervention in middle-aged and older adults. Obesity, 2010.

CalorAI provides estimates for general information only and is not medical advice.