Treatment for kidney stones includes eating a healthy diet high in fruits and vegetables and low in animal protein, while limiting intake of oxalate-rich foods such as spinach, chocolate, beets, nuts and tea, according to WebMD. High-oxalate fruits to avoid include berries, kiwis, figs and purple grapes, adds Healthline.
Foods high in oxalate, a naturally occurring molecule found in plants, pass through the digestive tract where it can bind with calcium and be excreted in the stool, explains Healthline. When too much oxalate continues through to the kidneys, this can lead to kidney stones. Vegetables that contain high levels of oxalate include rhubarb, okra, leeks, spinach, beets and Swiss chard. Almonds, cashews, peanuts and soy products should also be avoided. Grains, wheat germ, quinoa, cocoa, chocolate and tea have high amounts of oxalate.
Research indicates that increasing intake of calcium-rich foods when eating high-oxalate foods is helpful in eliminating oxalates from the body, notes Healthline. Choose high-calcium dairy foods such as milk, yogurt and cheeses and vegetables such as broccoli, watercress, kale or okra. Consuming more than 1,000 milligrams of vitamin C per day can increase oxalate levels, since vitamin C converts to oxalate.