At the International Kidney Stone Institute, our goal is nothing less than the cure.

Information About Dietary Oxalates

If you form calcium-oxalate kidney stones, it is important to limit your intake of dietary oxalates. Many healthy foods contain oxalate; you should limit those with very high concentrations. Below is a list of food containing very high levels of oxalate. Small amounts of these foods periodically are less harmful than single large amounts or binges.


  • Wheat germ


  • Beets, fresh or pickled
  • Collards *
  • Okra
  • Pokeweed (poke greens)
  • Pursiane leaves
  • Rhubarb
  • Soy foods (including soy milk)
  • Swiss chard
  • Spinach


  • Nuts (peanuts, peanut butter, pecans)
  • Chocolate/Cocoa
  • Citrus Peel (candied lime, orange, lemon)


  • Tea (green tea is OK)
  • Hot Chocolate/Chocolate Milk


  • Black Pepper

Keep in mind that cooking greens condenses the oxalate level per serving. In other words, a small spinach salad would contain much less oxalate than a small serving of cooked spinach.