Oxalate Diet

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Latest Edit: Hector 2014-03-13 (EDT)

See Also Naturopathic Therapies
See Also Clinical Nutrition

Oxalates are chemicals that are found in plant foods. A low oxalate diet is commonly used to help clear kidney stones or to prevent their formation.


  • Restriction of dietary calcium enhances oxalate absorption and excretion, whereas an increase in calcium intake may reduce urinary oxalate excretion by binding more oxalate in the gut.[1]
  • The following foods are the most strongly associated with an increase in urinary oxalate excretion:[1]
  • Vegetables such as spinach, beets
  • Fruits such as rhubarb, strawberries
  • Nuts and seeds such as almonds, peanuts, walnuts, hazelnuts, pecans
  • Other foods and drinks such as chocolate, tea (green, black, iced or instant), coffee, cola, wheat bran

Foods that have some level of oxalate include:

  • Grains such as white corn grits, wheat germ, whole-wheat flour.
  • Fruits such as berries (blackberries, gooseberries, black raspberries), concord grapes, red currants, damson plums, peels from lemons, limes and oranges and tangerines.
  • Desserts such as fruitcake or other desserts that contain the fruits listed above.
  • Protein such as baked beans with tomato sauce, peanut butter and tofu.
  • Vegetables such sweet potatoes, vegetable soups that contain very few vegetables, beans (wax, legume and soy), celery, dark leafy greens (swiss chard, endive, escarole, parsley), eggplant, leeks and summer squash.
  • Beverages such as draft beer.


The Oxalate diet has been found to be beneficial for the following conditions:


  1. 1.0 1.1 Massey LK, Roman-Smith H, Sutton RA (Aug 1993) Effect of dietary oxalate and calcium on urinary oxalate and risk of formation of calcium oxalate kidney stones. J Am Diet Assoc.'93(8):901-6. PMID: 8335871.
  2. Frassetto L, Kohlstadt I (Dec 2011) Treatment and prevention of kidney stones: an update. Am Fam Physician.;84(11):1234-42. PMID: 22150656.
  3. Koide T (Dec 1996) Hyperuricosuria and urolithiasis Nihon Rinsho.;54(12):3273-6. PMID: 8976104.