- Eat foods that nourish the Kidneys. for almost everybody, both men and women, Chinese yams are the best food for the Kidneys. They nourish the Kidneys, as well as help with lower back pain. Another food good for the Kidneys is chestnut. If you have Kidney problems, do not have raw, cold, very spicy, oily foods or drinks, such as cucumbers, watermelons, persimmons, ice water, spicy chili, and deep-fried foods.