Explore Kidney C.O.P.®’s diet chart for kidney stone for foods high in oxalate. Discover the do’s and don’ts to reduce stone formation! Diet can help and should complement any measures used to reduce calcium oxalate crystal growth. Below is an oxalate list of high, medium and low levels of oxalates (or a diet chart for kidney stone). Foods high in oxalate should be avoided. While on an oxalate diet, try to consume foods from the low and moderate list.