Roast duck is rich in protein, fat and many other essential nutrients, but as a food, roast duck does not have the effect of medicine. Roast duck is rich in nutritional value, with a high content of protein, especially fat evenly distributed in the tissues of the whole body and a fatty taste. The nutritional content of roast duck varies due to different brands. Take a certain brand as an example, every 100 grams of roast duck contains 530 calories, of which 18.1 grams of protein, 50.8 grams of fat, 107 milligrams of vitamin E, 2.7 milligrams of niacin, 103 milligrams of potassium and 11 milligrams of calcium. Roast duck is calorie-rich and can provide abundant energy for the body, while containing high quality protein. Roasted duck can replenish the nutrients needed by the human body, but roasted duck, as a food, does not have the efficacy of medicine and cannot achieve the purpose of treating diseases. People who are allergic to duck meat are forbidden to eat roast duck. People with high blood fat should eat less roast duck. Roasted duck needs to be consumed in moderation and should not be overeaten to avoid adverse reactions.