The harm of taking Cistanchis is not clear, but it should be noted that it is not recommended for people with yin deficiency (deficiency of yin and essence in the body, resulting in hyperactive fire) and loose stools (loose, unformed feces) and diarrhea. Cistanchis refers to the dried fleshy stems with scaly leaves of Cistanchis tubiflora or Cistanchis littoralis of the family Ledebouriaceae, which contains substances such as eugenol, epimastigote, and turpentine. As a yang tonic, Cistanchis is sweet, warm, moist, salty and enters the kidney, with the effect of tonifying the kidney, strengthening the yang, benefiting the essence and blood, in addition, it also has the effect of lubricating the bowels and laxative. It can be used in treating weakness of muscles and bones, deficiency of essence and blood, impotence and infertility, soreness and weakness of waist and knees, and constipation. Because of the warm nature of Cistanchis, it is contraindicated for people with yin deficiency and fire exuberance; and because Cistanchis can moisten the intestines and laxative effect, it may aggravate diarrhea if people with loose stools consume this medicine. Chinese medicines should be used under the guidance of a Chinese medicine practitioner, and should not be used privately to avoid causing damage to the organism.