Eating beef in moderation at night will not make you fat. Beef is a nutritious protein-based food. Every 100 grams of lean beef calorie is 125 calories, which contains 18 grams of protein, 3g fat, 0.2 grams of carbohydrates and 122 grams of cholesterol. Beef also contains a variety of minerals and vitamins. Beef has a high protein content and is of high quality, containing eight essential amino acids that cannot be synthesized by the body, making it an excellent source of protein. Lean beef is also very low in fat and carbohydrates, making it ideal for weight loss, fitness and diabetic patients. Beef is not high in calories, but also has a high protein content and a strong sense of satiety. Appropriate consumption of beef can increase the sense of satiety, while supplementing all kinds of nutrients, making it a good food for weight loss. But any food should control the amount, if consumed in excess can grow fat. In addition, those who are allergic to beef should not eat beef.