If you’ve had a kidney stone once, there’s a 50/50 chance it could happen again—but with a few simple changes to your diet, hydration, and supplements, you can stack the odds in your favor.

When urine becomes too concentrated, tiny crystals can form and grow into painful kidney stones—blockages that may require more than just water to flush out..

Taking high doses of vitamin C supplements, 500 mg or more a day on a regular basis, has been shown to increase the risk of developing kidney stones in some people.

High vitamin C intake (500 mg+ daily) can raise kidney stone risk, so get your RDA from foods or choose C-ERO, a zero-vitamin-C multivitamin designed to help prevent stones.