Is Tea Bad for Your Kidneys?
Drinking tea is usually thought to be very beneficial for overall health, but does it impact the kidneys? Learn more about the potential effects of tea on your kidneys.
Evidence
One study published by Nephrology Dialysis Transplantation found that those who drank tea had a lower risk of developing chronic kidney disease than those who did not. The authors concluded that tea “may have a protective effect on [the] development of CKD”.
However, a review of studies found that long-term consumption of tea can cause an increase in urinary calcium and oxalate, which can lead to kidney stones.
Cautions
There are some cautions to consider when drinking tea:
- Caffeine: Tea contains caffeine, which has a diuretic effect and can contribute to dehydration. This can put extra strain on your kidneys.
- Additives: Be mindful of what you add to your tea. Milk, sugar, and processed flavorings can add unnecessary calories and fat to your diet.
- Herbal Teas: Unregulated herbal teas, including those advertised for therapeutic use, are not regulated and may contain dangerous ingredients.
Conclusion
The research on the effect of tea on the kidneys is conflicting. While some studies have found that regular consumption of tea may have a protective effect against chronic kidney disease, long-term consumption can lead to an increased risk of kidney stones due to increased levels of calcium and oxalate. When drinking tea, be mindful of any caffeine and other add-ins, and be sure to avoid unregulated herbal teas.
