Gastroenterologist Busts the Myths About Lemon Water: What It Really Does to Your Body

For many health enthusiasts, starting the day with a glass of warm lemon water is almost a sacred ritual — believed to “detoxify” the body, boost metabolism, and aid digestion. But how much of this morning habit is science, and how much is hype?

According to Dr. Gaurav Mehta, Consultant, Gastroenterology/Hepatology and Transplant Hepatology at Kokilaben Dhirubhai Ambani Hospital, lemon water has real benefits — but it’s far from a miracle drink. “It can help with hydration and mild digestive support,” he says. “But it doesn’t detoxify your body or directly help you lose weight.”

Here’s what Dr. Mehta says you should know before reaching for that lemon every morning.

1. It Keeps You Hydrated, Not Detoxified

Lemon water encourages better hydration because of its refreshing taste — especially for people who don’t enjoy plain water. But Dr. Mehta clarifies that it doesn’t “flush out toxins.”
“Your liver and kidneys are your natural detox systems. No drink can replace their function,” he explains.

2. It May Aid Digestion — for Some

The mild acidity of lemon juice can stimulate saliva and digestive enzymes, which may reduce morning bloating. However, this effect isn’t universal. “Some people feel lighter and more comfortable; others may notice no difference,” says Dr. Mehta.

3. It Doesn’t Directly Burn Fat

Lemon water can make you feel full and replace high-calorie drinks, which helps with weight management — but it’s not a fat burner. “It only supports weight loss if paired with a balanced diet and exercise,” Dr. Mehta emphasizes.

4. It Can Trigger Acidity in Sensitive Individuals

If you have acid reflux, gastritis, or ulcers, lemon water may worsen symptoms. “Citric acid can irritate the stomach lining, so those with acidity issues should avoid or dilute it heavily,” he warns.

5. It Can Damage Teeth If Overused

Too much lemon water, especially when undiluted, can erode tooth enamel due to its acidity. Dr. Mehta advises: “Drink it through a straw and rinse your mouth with plain water afterwards.”

6. Dilution and Timing Are Key

Moderation makes all the difference. Dr. Mehta recommends using half a lemon in a glass of warm or room-temperature water, once or twice daily. “You can drink it in the morning or after meals, but avoid overdoing it.”

7. It’s No Substitute for a Healthy Diet

Relying solely on lemon water for health or digestion is a mistake. “Real gut health comes from a balanced diet rich in fibre, hydration, and regular meals — not from one ‘miracle’ drink,” says Dr. Mehta.

8. Moderation Is the Real Secret

Lemon water can be refreshing and beneficial when used wisely. “It’s not a cure-all,” Dr. Mehta concludes. “Think of it as one small part of a larger healthy routine that includes exercise, balanced meals, and good hydration.”

The Takeaway

Lemon water is simple, hydrating, and refreshing — but it’s not the detox drink social media makes it out to be. Used in moderation, it can support your digestion and hydration. Overuse, however, may harm your teeth or stomach. The real health magic lies not in one glass, but in your overall lifestyle choices.