So it's been more than a year I've been on 0.5mg dutasteride and it hasn't done much for my hair. I've been thinking of taking a blood test to check my DHT levels. I'd like to know what I need to get my DHT levels checked at a lab. Do I need a doctor's prescription or can I just go to the lab directly and ask them to do a blood test to check my DHT levels. Also I'd like to know what information I need to provide before the test and receive after a test to make a proper judgement on how the DHT is affecting my hair loss. Thanks.