Should you drink water before, during, or after meals? Experts weigh in

It’s a simple daily habit, yet surprisingly controversial: when is the best time to drink water—before, during, or after eating? While some swear by a glass before a meal to curb appetite, others avoid drinking until their plate is empty. Nutrition specialists say the truth is far more straightforward—and the benefits depend on timing and how you drink.

Before meals: a gentle appetite control

Having a glass of water 15 to 30 minutes before eating can trigger a natural fullness effect, helping you slow down and avoid overeating. It works by gently stretching the stomach, giving your brain a head start in recognising satiety.

This trick can also help manage emotional hunger, giving you a pause before reaching for snacks. Some studies suggest it may slightly boost energy expenditure by temporarily increasing blood pressure—useful for those with low blood pressure, but not advisable for people with hypertension.

For an extra digestive boost in the morning, some prefer warm lemon water—about one-third lemon juice to two-thirds water—though it’s best avoided if you have reflux or ulcers.

During meals: no reason to hold back

The idea that drinking while eating disrupts digestion or causes bloating has no scientific backing. In fact, sipping water throughout a meal can help soften food, aid saliva production, and make chewing easier—especially important as we age and natural saliva flow decreases.

Taking small sips also encourages you to put down your cutlery between bites, slowing your pace and preventing overeating. The best choice is still plain, room-temperature water—ice-cold drinks can cause the stomach to contract uncomfortably.

Two to three glasses during a meal, including one at the end, can also help reduce post-meal stomach acidity. While tea or coffee after lunch may help regulate blood sugar and even benefit post-meal low blood pressure, sugary sodas—diet or not—are best avoided, as they can trigger bloating and stimulate appetite.

Between meals: steady hydration is key

On average, the body loses around 2.5 litres of fluid daily through breathing, sweating, urination, and digestion. Roughly a litre comes from food, with the rest needing to come from drinks—hence the commonly recommended 1.5 litres of water per day.

But don’t wait until you’re thirsty; that’s a sign dehydration has already begun. Instead, aim for small, regular sips throughout the day. Gulping down large amounts in one go and then going hours without drinking is far less effective—and can even cause issues like hyponatremia (low sodium levels) if done excessively without balancing electrolytes.

While water should be your main source, moderate amounts of tea and coffee are fine—just be mindful that they can reduce iron and calcium absorption, and too much coffee can disrupt sleep or irritate sensitive digestion. Fruit juice, even fresh, should also be kept in check due to its impact on blood sugar.

The takeaway

Whether before, during, or between meals, drinking water plays a vital role in digestion, appetite control, and overall health. The best approach? Spread your intake evenly through the day, listen to your body, and choose water over sugary or overly processed drinks. Your digestion—and your energy levels—will thank you.