Does Alcohol Drinking Increase Risk of Kidney Stones?
No, alcohol consumption does not increase the risk of kidney stones—in fact, moderate to heavy beer intake and moderate wine intake appear to be associated with a reduced risk of kidney stone formation.
Evidence from Guidelines
The major clinical practice guidelines on kidney stone prevention do not identify alcohol consumption as a risk factor for stone formation. The 2025 European Association of Urology guidelines 1 and the 2014 American College of Physicians guidelines 2 focus on fluid intake, dietary modifications, and pharmacologic interventions, but notably do not list alcohol as a substance to avoid or restrict for stone prevention. The ACP guidelines specifically recommend increased fluid intake to achieve at least 2L of urine per day and mention reducing soft drinks acidified by phosphoric acid (colas), but make no recommendations regarding alcohol restriction 2.
Research Evidence Shows Protective Effects
Recent high-quality research consistently demonstrates an inverse relationship between alcohol consumption and kidney stone prevalence:
Beer and Wine Show Dose-Dependent Protection
A 2024 NHANES analysis of 29,684 participants found that beer (OR = 0.76,95% CI: 0.61-0.94) and wine (OR = 0.75,95% CI: 0.59-0.96) intakes were strongly associated with lower odds of prevalent kidney stones 3. The protective effect was dose-dependent for beer:
- Drinking >28-≤56 g/day: OR 0.60 (95% CI: 0.39-0.93)
- Drinking >56 g/day: OR 0.34 (95% CI: 0.20-0.57)
For wine, the effect was most pronounced at moderate intake (>14-28 g/day) with an OR of 0.54 (95% CI: 0.36-0.81) 3.
Heavy Drinking Shows Consistent Protective Associations
Another 2024 NHANES study found that heavy alcohol consumption was associated with significantly reduced likelihood of kidney stones in multiple subgroups, including young individuals (OR 0.745), older individuals (OR 0.566), and those with normal BMI (OR 0.468) 4. Former drinkers had lower odds of kidney stones compared to current drinkers (OR 0.762) 4.
Mechanism: Increased Fluid Volume
The protective effect is likely mediated through increased urine volume and dilution, which reduces supersaturation of stone-forming substances 5. Beer and wine contribute to overall fluid intake while also containing compounds that may favorably alter urinary chemistry.
Important Caveats
- Liquor showed no protective association in the studies 3
- One 2023 study found no significant association between alcohol and kidney stones 6, though this may reflect methodological limitations
- The protective effect should not be interpreted as a recommendation to start drinking alcohol for stone prevention, given alcohol's well-established harms to overall health, including liver disease, cardiovascular effects, and cancer risk
- Increased fluid intake from water remains the primary evidence-based recommendation for stone prevention 2
Clinical Bottom Line
When counseling patients about kidney stone prevention, you should not advise them to restrict alcohol consumption based on stone risk alone. For patients who already consume beer or wine in moderation, you can reassure them that this habit does not increase their stone risk and may even be protective. However, the cornerstone of dietary prevention remains achieving adequate hydration with at least 2L of urine output daily through increased water intake 2.