If progesterone reduce sebum that means that i have high pregesterone,cause after quiting propecia i had never again produce oil in my face neither my scalp,along with the rest damage.
I mean it's possible based on my limited understanding. I don't think it's likely that you'd be a male with elevated progesterone to the point it prevented sebum entirely - at least not without some type of wild hormone tinkering.
I'd be willing to bet your lack of sebum is related to the damage Propecia did on your ability to produce DHT (see my prior post about it's relationship to sebum). Lack of sebum is a known PFS symptom: Post-Finasteride Syndrome