The onions have sprouted and can be placed in the room. After the onions sprout, quickly remove the rotten parts and grow them in water. Onions have the effect of dispersing wind and cold because onion bulbs and leaves contain a greasy volatile called propylene sulfide, which has a spicy taste. This substance can resist cold, resist influenza viruses, and has a strong bactericidal effect.

Onions have volatile substances and have a certain refreshing effect. It can help cells better utilize glucose, lower blood sugar, and supply heat energy to brain cells. It is a good dietary vegetable for patients with diabetes and mental illness.

Extended information

Onions are a very common and cheap home-cooked dish. Its meat is tender, juicy and spicy, with good quality and suitable for raw consumption. Originating from western Asia, it is cultivated throughout China and available in all seasons. The edible part of an onion is the fat underground bulb (i.e., the onion head). In foreign countries, it is known as the "Queen of Dishes" and has high nutritional value.

Reference: Baidu Encyclopedia: Onion