I'm not really sure how I can elaborate more. It's know that Progesterone is a mild aromatase inhibitor. Since Progesterone converts directly to Pregnenolone, which is a known 5-Ar inhibitor. Progesterone won't work nearly as well as an aromatase inhibitor like Anastrozole, or a supp like DIM/I3C, and I wouldn't use it for that purpose either, but Progesterone will conservativily lower E2 levels.