In people with androgenetic alopecia, DHT is usually linked to hair thinning and the miniaturisation of hair follicles. DHT, however, can affect hair development differently depending on the body part. For instance, throughout puberty, it is in charge of promoting the growth of body and facial hair. Increased DHT levels in diseases like polycystic ovarian syndrome (PCOS) can cause hirsutism, or the excessive growth of hair on the face and body. DHT regulates hair development in various parts of the body even though it may not directly thicken hair on the scalp.