The bud head is green, and there is a high probability of discoloration due to photosynthesis, and there is no deterioration and rot. It is edible. Bean sprouts contain vitamins, calcium, phosphorus, iron, potassium, carotene and other nutrients. Proper consumption of bean sprouts can play a role in clearing away heat and promoting diuresis, reducing swelling and diuresis, and can also effectively reduce cholesterol, relieve constipation and improve immunity.