Leeks can be eaten raw. As a fiber-rich food, leeks have a laxative effect. At the same time, they can also reduce the time that other foods stay in the intestines and reduce the intestinal response to fat, etc. The absorption is beneficial to weight loss. But completely raw leeks don’t taste good. It has a moderately spicy taste and is obviously irritating to the gastrointestinal tract. When it tastes best, wash it and add some seasoning to make it taste better.

Leeks can keep the human body warm, dissipate blood stasis, nourish the liver and kidneys, warm the waist and knees, aphrodisiac and strengthen essence. It is also suitable for women who often have cold hands and feet, cold lower abdomen, backache or late menstruation. Leeks are easy to grow and can grow on almost any land. They are less pest-infested and have strong adaptability to life. Therefore, they are also known as lettuce and lazy vegetables.

In addition, "Compendium of Materia Medica" describes leeks: leeks warm the middle and lower the qi, replenish deficiency, harmonize the internal organs, make people eat, benefit yang, and stop diarrhea. Therefore, it was also called aphrodisiac in ancient times, but now it is known as natural powerful steel.

Leeks contain plant-based aromatic volatile oils, which can increase appetite. The elderly, children, pregnant women, etc. should eat some spring leeks in moderation, which is beneficial to improving health.

Leeks have the effects of keeping warm and strengthening the stomach. The crude fiber contained in them can promote intestinal peristalsis and help human digestion. Not only can it prevent habitual constipation and intestinal cancer, but it can also wrap up some debris in the digestive tract and excrete it with the stool, so it is also known as "intestinal cleansing grass" among the people.

Leeks have the effects of dispersing blood stasis, promoting blood circulation, and detoxifying, and are beneficial to the human body in reducing blood lipids and preventing and treating coronary heart disease, anemia, and arteriosclerosis.

The sulfur compounds contained in leeks have certain bactericidal and anti-inflammatory effects, and can inhibit Pseudomonas aeruginosa, dysentery, typhoid fever, Escherichia coli and Staphylococcus aureus.