Not all AI’s are bad on lipids. Several studies have shown Aromasin to be much easier on lipid values. A few even showed no negative effects, if I remember correctly. Some studies showed it to have a major negative effect. As with all things in life, YMMV. The only way to know for sure what it is or is not doing to you is to get regular blood work done while on cycle. Any assumptions being made without testing to back it up is just a wild ass guess.