Onions can be eaten raw to lose weight. Onions and fungus can be eaten cold together. It can stimulate the secretion of gastrointestinal and digestive glands and stimulate appetite. After cooking, onions will give off a unique fragrance and stimulate our taste buds. This fragrance can stimulate the digestive gland to secrete a lot of digestive juice, which is helpful to our gastrointestinal peristalsis and prevent constipation when losing weight.