Some of the oxalate in urine is made by the body and eating certain foods with high levels of
oxalate can increase the amount of
oxalate in the urine, where it combines with calcium to form calcium oxalate stones.
Foods that have been shown to increase the amount of oxalate in urine include spinach, rhubarb, nuts and wheat bran.
Avoiding these foods may help reduce the amount of oxalate in the urine.