Antler is the tender horn of a stag. It is a medicinal material containing a variety of colloidal substances, a variety of different structures of calcium, and a variety of complex and trace rare components. Deer antler can nourish kidney yang, strengthen muscles and bones, and nourish essence and blood. It can be used for kidney yang deficiency syndromes; it can supplement blood and can be used for blood deficiency syndromes; In addition, velvet antler has a sex hormone-like effect, which can promote uterine development, fight fatigue, improve sleep, improve immune function, and delay aging.