by Cynthia M. Johnson, MA
What Are Oxalates?
Oxalates are substances found in plants, animals, and humans.
Why Should I Follow This Diet?
In the body, oxalates come together with calcium and iron to make crystals. In most people, these crystals leave the body in urine. For some people, they can grow into kidney stones. This diet may lower the risk of certain types of kidney stones.
Each person's body absorbs oxalates differently. This diet doesn't work for everyone. You can still get all the nutrients you need without having too many oxalates. Talk to a dietitian.
The diet limits oxalates to 50 milligrams (mg) each day. They are found in many foods. You will need to learn which foods you can limit and which foods you shouldn't eat.
It is hard to tell how many oxalates are in foods you eat using current standards. It can vary by food, cooking, processing, and growing factors.
This chart lists foods that are low or moderate in oxalates. If you have calcium stones, you will need to lower sodium, too.
Be aware of how many grams of oxalates you are eating. Think about meeting with a dietitian.
Here are more tips to help stop you from getting kidney stones:
Eat Right—American Academy of Nutrition and Dietetics
The Oxalosis and Hyperoxaluria Foundation
Dietitians of Canada
The Kidney Foundation of Canada
Attalla K, De S, et al. Oxalate content of food: A tangled web. Urology. 2014;84(3):555-560.
Diet and kidney stones. National Kidney Foundation website. Available at: https://www.kidney.org/atoz/content/diet. Updated December 2014. Accessed December 5, 2018.
Diet for kidney stone prevention. National Institute of Diabetes and Digestive and Kidney Diseases website. Available at:
...(Click grey area to select URL)
Published May 2017. Accessed December 5, 2018.
Kidney stones. EBSCO Nursing Reference Center website. Available at: https://www.ebscoh... . Updated August 3, 2018. Accessed December 5, 2018.
Last reviewed December 2018 by EBSCO Medical Review Board Dianne Scheinberg Rishikof MS, RD, LDN
Last Updated: 12/5/2018
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