A diet rich in oxalates causes kidney stones. Kidney stones are very harmful for health as they block the urinary system. The condition causes a lot of pain to the affected person and it is treated through surgery. If you want to prevent and cure kidney stones, you should avoid foods that contain oxalates. We will tell you about some foods that contain less oxalate. Drinks like black tea, chocolate drinks and instant coffee are rich in oxalates. Dairy foods like yogurt and cheese made from soy also contain oxalates. You should take a low oxalate diet. Following is a list of low oxalate foods.