Kidney stone alert: 10 foods that can trigger kidney stones and 10 that help prevent them

Kidney stones are a painful problem. Diet is important for prevention. Stones form from substances like calcium and uric acid. Spinach, beets, and red meat may increase risk. Water, citrus fruits, and bananas can help prevent stones. Limit salt and animal protein. See a doctor for severe pain or bloody urine. Tests and treatments are available for kidney stones.