Medicated diets for restoring yang are those cooked by mixing warm-natured drugs chosen for this purpose into certain foods. They have the effects of warming the kidney, invigorating yang, strengthening the constitution, exciting sexuality, enhancing sexual function and genitality, and are applicable to deficiency of yang — mainly that of both the spleen and the kidney, manifested as tinnitus, giddiness, lassitude or cold-pain in the loins and knees, impotence, premature ejaculation, sterility in women, clear urine, loose stool, pale complexion, listlessness, pale tongue, and deep, tready and feeble pulse.