Lemon juice
Lemon juice can be useful in treating kidney stones. It contains citrate which breaks up calcium stones [4] and prevents their build-up in the body. Calcium oxalates are the most common renal stones found in the body. What citrates do is coat the calcium and oxalate deposits in the kidney so they can’t bond and form stones.
Lemons have the highest concentration of citrate among citrus fruits. This makes them a preferred option for treating renal stones.
Large quantities of lemon juice are often required to get significant results, but this 2017 study in the Journal of Urology [5] showed that combining four liters of water with four ounces of lemon juice every day can reduce the rate of renal stone formation in a person from 1.00 to 0.13 per year.