There are cortisol blockers if he wants that.
My knowledge of lean xtreme is limited but I believe it enhances the thyroid and use anti-cortisol effects to prevent muscle waisting. You're playing with fire using this in PCT. Hell, people don't even use clen during PCT and it's anti-catabolic. General rule is stay away from any fat burners during PCT where you don't even have enough hormones to keep the muscles intact.