I have used Syntrabol by Syntrax. It contains about 200mg of 20-hydroxyecdysterone/Isoinokosterone. I actually used 6 caps a day-1200mg. Good stuff,after about 3 weeks I noticed muscle fullness, endurance, strength and vascularity. An ideal stacking product would be the Methoxy-7, which is what I a currently using with the Syntrabol. One of the greatest stacks ever. Maybe even better than creatine and glutamine! Try this potent 1-2 combo and you won’t be dissapointed