If the body has no allergy to leeks or beef, then leeks and beef can be eaten together. But if you are allergic to leeks or beef, you can not eat together. Leeks and beef are more common ingredients in life, these two ingredients contain a variety of nutrients, for example, per 100 grams of leeks contain about 2.4 grams of protein, carbohydrates about 4.6 grams of carotene is about 1410 mg, vitamin C is about 24 milligrams. Every 100 grams of beef contains about 19.9 grams of protein, about 2 grams of carbohydrates, about 7 micrograms of vitamin A, calcium is about 23 milligrams. If the body is not allergic to these two ingredients, leeks and beef can be eaten together, can supplement the body with a variety of nutrients, is conducive to good health. However, if the body of these two ingredients have allergies, it is not recommended to blindly with, after eating will trigger the body to appear allergic phenomenon.