2, leek can help to lose weight, because leek is rich in crude fiber, and dietary fiber can stimulate gastrointestinal motility, accelerate the digestion and absorption of food, make waste excreted faster, and can detoxify the body, thus achieving the purpose of losing weight. Don't eat spinach, beef, liquor, honey and other foods after eating leeks, otherwise it will cause diarrhea, get angry or affect the body's absorption of calcium.