I have never taken tren E before, but have seen it many times. I have noticed the other times when I have seen it that it is a darker oil than test. I just got some from a new source and the oil is lighter like test. They told me it is because it goes through triple filtration to get all the unnecassary stuff out. I wanted to hear your guys opinions on this because it would help me greatly before I start stacking it with test.