The hormone primarily responsible for facial hair growth is dihydrotestosterone (DHT). DHT is a powerful androgen, a type of male sex hormone.
While testosterone is the most well-known androgen, it's DHT that directly stimulates hair follicles to grow facial hair. DHT is produced from testosterone through an enzyme called 5-alpha reductase.
The amount of DHT in the body varies between individuals, and factors like genetics and age can also influence facial hair growth.
