Lower is better, Cissus-xt is the better product. Not saying that because I'm a rep. I actually read it on here from one of mr.cooper69 posts. He went into all the science of it and why also. Me, I'm just not that smart, but I know coop is a pretty smart guy, so I'm just following his advice on this. Maybe he will even come in here and explain it, if he has the time.