Usually do not eat five days of beef can lose weight, weight loss is mainly rely on low-fat, low-calorie diet, moderate exercise. Five days to eat beef weight loss program is generally no scientific basis, weight gain is mainly too high energy intake, no moderate physical activity resulting in obesity. Weight loss requires time and scientific way of losing weight, not just five days to lose weight successfully. Beef contains more protein, trace elements and minerals, fat content is relatively low, every 100 grams of beef contains 125 calories, of which 0.2 grams of carbohydrates, protein 17.8 grams, 2 grams of fat, calcium 6 milligrams, iron 2.2 milligrams. Moderate eating beef to some extent can increase satiety and reduce the intake of other foods. But simply relying on eating beef to achieve weight loss is not an option. Those who are allergic to beef should not eat beef.