about a balance of the androgen besides the other ingredients of the hair growth formula product. For these reasons, cuachalalate extract that contains a 5_-reductase inhibitory component such as schinol or other triterpenes, which possesses a few tenths of type II 5_-reductase inhibitory activity compared to that of finasteride and almost do not inhibit type I 5_-reductase, would be a reasonable material to be prescribed in hair growth formula products classified as quasi-drug in Pharmaceutical Affairs Law.