I’m not sure if 19-nor-andro can be defined as a supplement – it is essential a pro-hormone like a steroid with ephedrine.
I noticed when taking it that my bodyfat went down to the tune of 3 cardio sessions without doing 3 cardio sessions. Weight lifting sessions were fast and furious. But I also found some ‘roid rage’ type effects when driving home from the gym.
In addition, felt very flat the next day. 2 pills a week resulted in my sperm count falling also.
Basically it was shutting my testosterone production down.
After that I stopped taking them and would not recommend – they have similar side effects to steroids such as increased aggression, cancer causing, cholestrol increasing etc.