From the perspective of modern medicine, chickens and ducks are all poultry food, which is composed of protein, fat, vitamins, inorganic salts and other nutrients. Although there are some differences in content, there is little difference on the whole. Therefore, if you ask these questions to western medicine, I'm afraid the answer can only be: "nothing, you can eat everything." It may also be because chicken has more protein and less fat, and may tend to eat more chicken.

But from the dialectical point of view of traditional Chinese medicine, the taste and function of these two kinds of birds are different. Chinese medicine believes that chicken is warm and sweet. Has the effects of warming middle warmer, benefiting qi and tonifying deficiency. Therefore, chicken is a good nourishing food. Chinese medicine has a book about dietotherapy. It is recorded in the "Resting Diet Spectrum": "Chicken tonifies deficiency, warms stomach, strengthens bones and muscles, promotes blood circulation, regulates menstruation, stops metrorrhagia (treating menorrhagia and leucorrhea), and saves frequent urination." Therefore, it can be used for kidney deficiency, deafness, nocturia, weakness of muscles and bones and so on. Especially in the rural areas of Jiangxi and Anhui, there is a kind of black-bone chicken with greater medicinal value, which is mostly used to regulate menstruation and stop metrorrhagia (menorrhagia or prolonged bleeding time). The famous gynecological Chinese patent medicine "Wuji Baifeng Pill" is mainly made of black-bone chicken, which can treat menstrual disorders and anemia. However, for people with hyperactivity of liver yang, such as people who often feel dizzy, have headaches and have high blood pressure; Or those with liver wind moving, such as trembling hands and feet, spasms from time to time, numbness of lips, and premonition of stroke, can't eat chicken, especially chicken heads, chicken feet and chicken wings. Chinese medicine believes that it can produce phlegm, help fire and dispel wind, and cannot be eaten. Whether cancer patients can eat chicken is still controversial. Some people think it's not suitable for eating chicken, while others think it's okay to eat chicken. My opinion is that I would rather not eat it, because the tumor is caused by qi stagnation, blood stasis and phlegm coagulation. Chicken can produce phlegm and help fire, which is not good for tumor focus. You can eat duck or goose instead.

Duck is flat or cold, sweet and salty, and has the functions of nourishing yin, tonifying deficiency, diuresis and detumescence. Compendium of Materia Medica: "Duck, waterfowl, too. To cure water conservancy and urination, it is advisable to use blue-headed drake; To cure fatigue and heat toxicity, it is advisable to use black-bone white duck. " Therefore, it is more appropriate for people with edema, yin deficiency and internal heat to eat ducks. Especially, feeding ducks with Cordyceps sinensis has a greater nourishing effect and a unique flavor. Always a famous dish. However, ducks are cold in nature. According to "Resting Diet Spectrum", people with yang deficiency and spleen deficiency, unknown exogenous pathogens and diarrhea in loose stool should not eat ducks. Comparatively speaking, duck is flatter than chicken, so anyone who can't eat chicken can use duck instead. People who are afraid of cold and easy to have diarrhea can eat chicken.