Soybean sprouts can be eaten after turning green. Soybean sprouts contain a variety of rich nutrients beneficial to human health, but soybean sprouts eat too much easy to cause indigestion, bloating and abdominal pain and so on, so should be eaten in moderation. General soybean in the process of germination is not required to see the light, so you need to cover it with a shelter to avoid sunlight, so soybean sprouts sprouting when the color is yellow. Soybean sprouts become green because the soybean in the process of germination saw the light, photosynthesis, which produces a large amount of chlorophyll, which is the normal reaction of the plant to see the light, consumption of human body harmless. Each 100 grams of soybean sprouts contain 47 calories, of which 4.5 grams of carbohydrates, 4.5 grams of protein, 1.6 grams of fat, 0.3 grams of saturated fatty acids, 0.4 grams of monounsaturated fatty acids, polyunsaturated fatty acids 0.7 grams of dietary fiber 1.5 grams of potassium 160 milligrams of calcium 21 milligrams of vitamin E 0.8 milligrams. Moderate consumption of bean sprouts can provide the body with more nutrients, while its dietary fiber is rich, can promote intestinal peristalsis. Soybean sprouts should not be consumed by those who are allergic to soybeans.