Gammadyn Zn by Unda is a homeopathic supplement designed to help with infertility and prostatitis through healthy zinc levels. Zinc is necessary for the metabolizing and synthesis of protein in addition to activating cell repair and growth. This means it plays a direct part in the bodys growth. healing and sexual maturation. Because of these qualities. it is taken to treat conditions like lowered immunity. disturbances in growth. infertility and numerous skin disorders like acne.