6 weeks max?...no man, you can run it longer than that. 8-10 weeks if you take the nessicary precautions ( EFA's , nician, plenty of water, clean diet). If you will spend just a few bucks, you can go have your cholest/liver values checked around week 6 to see if anything is out of line(I do this every time, and everything has always been ok) and then know if your good to continue to week 10 or so.