I have had over 100 stones and 3 procedures to rid them. I am now on lifetime medicine for them. winny will not cause stones though none things are high protein in the form of animal (steak, pork) excess dehydration, sodium, soda, citric acid, calcium. I got stones way before winny though with me the protein and dehydrtaion play a big factor and I also drank tons of gator ade ( sodium)