i remember reading about this before. Im not sure so dont quote me on this.
I think USPlabs stated that lower extracts have more of an anabolic effect. I dont see a lot of higher extact of cissus. I see them go up to 20% and I think the anabolic effects caps off at 20%. I may be completely wrong though. I read a thread on this awhile ago.
I think there is a reason why most companys choose lower extracts of cissus. I dont see most go above 20%
Maybe the higher the extract the more it cost?