According to experts, lemon contains a high content of citric acid, a substance that plays an important role in inhibiting the formation of kidney stones, especially calcium oxalate stones, the most common type of stones. Citric acid helps increase the amount of citrate in urine, thereby limiting calcium crystallization.
Dr. David Goldfarb, a nephrologist at Grossman School of Medicine, New York University (USA), said: "Citrate in urine has protective effects, helping to reduce the risk of kidney stones. Sugar-free lemon water is one of the easily accessible natural sources of citrate." However, he emphasized that the supporting effect is only achieved when patients maintain drinking enough water every day.
Some small studies show that people who regularly supplement with diluted lemon juice tend to reduce the frequency of kidney stones recurrence. However, experts also warn against abuse. Drinking too much thick lemon juice can cause stomach irritation, affect tooth enamel or worsen digestive problems.
Ms. Beth Czerwony, nutritionist at Cleveland Clinic (USA), recommends: "Lemon juice should only be considered a supportive measure. People with kidney stones need to clearly identify the type of stones, follow a suitable diet and treat them according to medical prescriptions.
When used properly, combined with drinking enough water, eating lightly and exercising reasonably, lemon can become part of a long-term kidney stones prevention strategy. However, patients should not arbitrarily replace drugs or delay specialized examinations.
