Bald causes! What is DHT (5α-dihydrotestosterone)?

DHT (5α-dihydrotestosterone) refers to an active hormone in the target cell of a male hormone.

DHT is associated with hair loss (male pattern hair loss), sebum increase (痤 acne), external genital development and enlarged prostate gland, and is particularly attracting attention as a cause of AGA (progressive male pattern baldness).

Why is DHT responsible for AGA made?