1. Eprotyr for use in the prevention and / or treatment of hair diseases in mammals. Eprotyr for use according to claim 1, wherein the hair disease is hair loss. Eprotyr for use according to any one of paragraphs 1 and 2, wherein the hair loss is selected from focal alopecia, androgenetic alopecia, including male type and female type of baldness, and hair loss caused by chemotherapy. 4. Eprotyr for use according to any one of paragraphs 1 and 2, wherein the mammal is a human. Eprotyr for use according to any one of claims 1 and 2, wherein the eprotyr is applied topically to the skin of mammals. A pharmaceutical composition for use in the prevention and / or treatment of hair diseases, comprising: (a) eprotyr as an active ingredient and (b) a pharmaceutically acceptable excipient. 7. The pharmaceutical composition for use according to claim 6, wherein the hair disease is hair loss, preferably selected from focal alopecia, androgenetic alopecia, including male type and female type of baldness, and hair loss caused by chemotherapy. A pharmaceutical composition for use according to claim 6 or 7, further comprising (c) a penetration enhancer, preferably selected from the group of isopropyl myristate, polypropylene glycol and dimethyl isosorbide. A pharmaceutical composition for use according to any one of paragraphs 6 and 7, which comprises from 0.0001 to about 10% by weight of eprotyrome based on the total weight of the pharmaceutical composition. A pharmaceutical composition for use according to any one of paragraphs 6 and 7, wherein the pharmaceutically acceptable excipient is selected from the group consisting of solvents,1. Эпротиром для применения в предотвращении и/или лечении заболеваний волос у млекопитающих.2. Эпротиром для применения по п. 1, в котором заболевание волос является выпадением волос.3. Эпротиром для применения по любому из пунктов 1 и 2, в котором выпадение волос выбирают из очаговой алопеции, андрогенной алопеции, включая мужской тип и женский ти