You can drink, but usually with some Chinese medicine, so that it is called medicinal food. You only drink a chicken soup is a food. Can not be called medicinal food, the chicken itself is the effect of blood, not the effect of tonic kidney, if the blood is weak, very thin people, drink will have a little effect. If you want to tonify the kidneys, it depends on whether it is kidney yin deficiency or kidney yang deficiency, choose some suitable for making medicinal diets of Chinese medicine with the function of tonifying the kidney yang or kidney yin herbs with the chicken to make medicinal diets to take. It is best to make under the guidance of a physician herbalist.