- Drinking green tea may lower the risk for incident kidney stones, especially among men.
Why this matters
- "A mainstay of dietary prevention is to increase fluid intake to achieve >2.5 L of urine volume daily," say researchers. "While water intake is generally preferable, other beverage choices might increase or decrease stone risk."
- Researchers studied incident kidney stones and tea intake among Chinese men (n=58,054; baseline age, 40-74 years) and women (n=69,166; baseline age, 40-70 years).
- Funding: NIH.
- Incident stones were reported by 1202 men and 1451 women.
- Green tea drinkers (men, HR, 0.78 [95% CI, 0.69-0.88]; women, HR, 0.84 [95% CI, 0.74-0.95]) had lower incident stone risk than never or former drinkers.
- Researchers observed a stronger dose-response trend for the amount of tea consumed per month by men (HR, 0.67; 95% CI, 0.56-0.80; Ptrend<.001 than by women ci p>trend=.041).
- Kidney stone incidence and tea intake were self-reported.
- Researchers only considered baseline information for most covariates included in their analysis.