Nolva is said to be good for colestoral. Why? Is it only good for colestoral becasue it doesnt get rid of estrogen only blocks it from binding to certain receptors thus keeping colestoral in check due to the estrogen in the body or the nolva itself actually keeps colestorall in check. If letro destroys almost all estrogen in the body and casues bad lipid profile will running nolva help the lipid profile?