everything takes time to build... some things just enhance it to go quicker than others... why do some people that are runners get better distance or speed faster than others?? how do some people get smarter quicker than others? don't those things take time as well to build? it just depends on the person, what they are taking to help them achieve they are doing and how HARD THEY WORK... I mean were talking, a difference in 2 weeks on a four or six week cycle... some ph's are a lot stronger than others and are made to only be taken a shorter period... you need to do some research on this...