Many people start their day with a glass of lemon water, believing it helps detoxify the body, improve digestion, and support weight loss.
However, health experts say the actual benefits are limited and excessive consumption may even harm teeth and the digestive system.
Lemons are rich in vitamin C and antioxidants. According to the US Food Data Central, 100 grams of lemon contains around 53 mg of vitamin C, which supports metabolism and helps protect body cells from oxidative stress.
Because of these nutrients, lemon water is often linked to detoxification, clearer skin, and fat burning. However, experts say scientific evidence supporting these claims remains weak.
Hydration is main benefit
Dr. Bui Thi Duyen, deputy chief of nutrition at Vietnam’s Military Hospital 175, said the main advantage of drinking lemon water in the morning is rehydration after a night’s sleep and a small boost of vitamin C.
She rejected the common belief that lemon juice flushes toxins from the body or directly promotes weight loss.
“There is currently no scientific evidence that lemon water burns calories,” she explained. According to the doctor, any possible weight-related benefit may simply come from replacing sugary beverages such as bubble tea with lemon water.
Experts warn about risks to teeth, stomach
Some people believe acidic drinks can improve digestion, but Dr. Duyen noted that the effect varies from person to person.
According to the American Dental Association, regularly consuming acidic drinks like lemon juice can gradually damage tooth enamel, especially when the drink is not diluted properly or oral hygiene is neglected.
Experts also warned that drinking lemon juice on an empty stomach may irritate the stomach lining in people suffering from gastritis, acidity, or acid reflux.
Dr. Duyen advised mixing the juice of half a lemon with 200 to 300 ml of water and using little sugar. She also suggested drinking through a straw or rinsing the mouth afterward to help protect tooth enamel.
People with existing stomach conditions were urged to be especially cautious.
Health experts stressed that no single food or morning routine can determine overall health.
Instead of relying on quick fixes, they recommended following a balanced diet, eating meals at regular times according to the body’s biological clock, and focusing on vegetables, quality protein, and reduced sugar and processed foods.
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