Leek as a common food, there is no efficacy of this statement, but its own rich in nutrients to meet the human body needs. The general population can be eaten, leeks are not drugs, so can not play a therapeutic effect equivalent to drugs. Leek itself can emit a unique pungent odor, because it contains sulfide and volatile essential oils and other components, which is to enhance people’s appetite has some help. Among them, sulfide also has a certain antibacterial effect, for thiamine and vitamin A absorption and some help, and leeks are rich in vitamin C (per 100g leeks contain about vitamin C32mg, and orange content is comparable), potassium, carotene, etc., is a more nutritious food. However, it should be noted that a single food does not have the ability to improve immunity and therapeutic effects. Leeks should not be consumed too much at a time, because it contains fiber coarse and more (about 1.4g of dietary fiber per 100g of leeks), not easy to digest.