Take the leftover vial and stick it in your fridge overnite, crystals will form if a compound is present. If so, reheat the vial and pin away.....If no crystals form most likely your screwed....
It’s sad and frustrating man.
im on 600mg of NPP and my source must be garbage too, I’ve had no weight or strength gains beyond what normal food contributes. So like 3 lbs in 6 weeks.