Functions and Indications of Epimedium: tonifying kidney yang, strengthening muscles and bones, dispelling wind-dampness. It is used for kidney yang deficiency, impotence and spermatorrhea, impotence and weakness of muscles and bones, rheumatism and paralysis, numbness and contracture. Lock Yang, Functions and Indications: tonifying kidney yang, benefiting essence and blood, laxative. It is used for kidney yang deficiency, essence and blood deficiency, lumbar and knee impotence, impotence and spermatorrhea, intestinal dryness and constipation. Cistanchis Functions and Indications: Tonifying kidney yang, benefiting essence and blood, moistening the intestines and relaxing the bowels. It is used for kidney yang deficiency, essence and blood deficiency, impotence and infertility, lumbar and knee soreness, muscle and bone weakness, intestinal dryness and constipation.