Dietary oxalate refers to a type of organic compound called an oxalate that is found in certain foods. Oxalates are naturally occurring substances that are present in many fruits, vegetables, and other food sources. They can also be produced by some bacteria in the human digestive system. Dietary oxalate intake has been linked to an increased risk of developing kidney stones, which is why it's important for individuals with a history of kidney stones or those who are at high risk for developing them to monitor their dietary oxalate consumption.