Propecia and NutraSweet Products

I am a male of 39 yrs old with Norwood scale 3 vertex. Have been prescribed propecia and am taking propecia for 8 weeks now but I see no effect.

I have read on the internet that if one is taking propecia to stop hair loss and consuming nutraweet products (artificial sweetner)at the same time than the nutrasweet makes the propecia ineffective because the nutrasweet converts to something in the body which does not allow the propecia to work. Please let me know what you think as I trust your opinion on this much discussed topic.

I looked it up and could not find anything on it. Essentially, I don’t have a clue. Can you send me a point of reference?