Definitely wild that your DHT levels don't budge one bit, but I recall that the user @IdealForehead claimed to have the same experience. He said multiple blood tests confirmed that neither finasteride nor dutasteride had an effect on him.
Very interesting. Afaik, that hasn't been documented in the scientific literature yet - my bet is on an alternative/backdoor pathway to DHT. I already got an appointment for more blood work next week, but I still need a strategy how to correctly identify those alternative pathways.
IF finasteride and dutasteride are indeed doing their job and an alternative (non-DHEA-Testosterone) pathway is responsible for those incredible serum DHT levels, I might even have an idea how to correct that - I will keep you guys posted with new infos.