How does finasteride work?

In hereditary hair loss, the hair roots are sensitive to the hormone DHT (dihydrotestosterone). It causes the follicles to gradually shrink, the hair becomes thinner and falls out earlier.

Finasteride inhibits the enzyme 5-alpha-reductase, which converts testosterone into DHT, and thereby lowers the DHT level. This can slow down or stop hereditary hair loss, and in some men the hair becomes denser again.

The effect sets in slowly and only lasts with continued use. Finasteride is prescription-only and intended for men. Whether it is suitable for you is clarified by the doctor based on your answers from the health questionnaire.