Can people with kidney stones drink tea?

Drinking tea for health maintenance is a well-known practice among many people. The renowned physician Zhang Zhongjing once remarked, “Tea is highly effective in treating bloody pus discharges.” While modern medical research has confirmed that tea’s bioactive compounds—such as catechins, caffeine, and theobromine—are closely linked to human health, frequent tea consumption may pose risks for certain individuals. Specifically, tannic acid and theobromine present in tea can increase the likelihood of calcium oxalate stone formation. Therefore, patients diagnosed with kidney or urinary stones are generally advised against drinking tea during treatment. Details are outlined below:

Can individuals with kidney stones drink tea?

Tea consumption is not recommended—particularly on an empty stomach. Tea contains numerous organic compounds, including polyphenols, carbohydrates, and organic acids. Commonly found constituents across most tea varieties include caffeine, theobromine, and tannic acid. Drinking tea on an empty stomach may lead to a substantial influx of oxalic acid into the body, significantly increasing the risk of stone formation. Consequently, tea intake is discouraged during active stone treatment. Similarly, foods high in oxalates—such as rhubarb, celery, chocolate, spinach, and cilantro—should also be consumed sparingly.

Maintaining good health requires a balanced and regular diet. Excessive intake of any food containing high levels of specific substances may predispose one to disease. In the pathogenesis of kidney stones, diets rich in protein, fat, purines, sugar, and sodium all elevate the risk of stone formation. Mechanistically, high-protein, high-sugar, and high-sodium diets increase urinary calcium excretion; high-fat diets reduce intestinal calcium absorption, thereby indirectly elevating urinary oxalate concentrations—and ultimately increasing the incidence of calcium-based stones.

Given the underlying mechanisms of stone formation, most cases can be prevented through lifestyle modifications. Preventive strategies extend beyond regulating tea consumption frequency to include moderation in intake of high-sugar, high-sodium, high-protein, and high-purine foods. Additionally, maintaining personal hygiene, engaging in regular physical activity, and adhering to consistent sleep-wake cycles are all effective means of sustaining high-quality health.

Medical professionals note that urinary tract stones smaller than a certain size may often pass spontaneously with appropriate lifestyle adjustments. Physical activities such as skipping rope, jogging, climbing stairs, and long jumping can facilitate stone expulsion. Furthermore, increased daily water intake helps accelerate stone passage and supports treatment—but must be practiced judiciously. Overhydration or excessive fluid intake may overburden the kidneys, potentially negating therapeutic benefits or even worsening outcomes.

We hope the above information proves helpful. Wishing you a healthy and joyful life!