How Can I Test DHT Levels?

Dear Dr Rassman,

I searched the blog, but did not find answers to two specific questions.

1.)Is there a blood test one can have to determine the level of DHT in the body? What level of DHT would be considered above normal? If I want my DHT levels tested, what do I ask for? (I have an appointment with a dermatologist next month)

2.) Is Androgenic Alopecia the ONLY thing that causes miniaturization of the hair follicles? For example, could seborrheic dermatitis, or some other scalp or systemic illness, cause the follicles to shrink in a similar fashion?

Thanks so much for sharing your knowledge!
(male, 28)

The best way to get your DHT blood levels is to have your doctor send your blood to a lab that can do this test. Testosterone is broken down to DHT by an enzyme called 5-alpha-reductase type 2.

Miniaturization can be caused not only from genetic hair loss, but also it can be found in an unhealthy person and by certain medications you may be taking, such as tranquilizers. People who go through telogen effluvium can have miniaturization as well and the process can be reversed. More about miniaturization can be found here.