Pig bones, soybeans, kelp and bitter gourd can be used together to make soup, because these foods are incompatible with each other, and eating together will not cause any adverse reactions. They are fragrant and have high nutritional value. They contain a variety of nutrients needed by the human body, which complement each other and have the effects of clearing away heat and toxic materials, tonifying kidney and calcium, enriching blood and qi, invigorating spleen and regulating stomach.