I've been using Cissus for 8 months and absolutely love what it has done for me. Originally it helped me survive severe shoulder problems. Now I have used alternating stacks with Cissus/Powerfull as my NHA stack. With it I seem to be leaner and steadily continue to gain strength. Don't laugh even at almost 65 it DOES work! Now as I understand it the P-Full is no longer Muira-Puama but a Cissus extract. It does seem to work even better than the original. Then along comes Symmetry and that has Cissus as half of its base and it is touted as a good combo with Cissus. What this old fart doesn't understand is how to use them. Could I alternate stacks with Cissus/P-Full and then Cissus/Symmetry say every 2 months? I am not a bodybuilder I am more a powerlifter and interested in safe long term growth assistance.