I just received two bottles of the aromasin and to be honest, my rats nips have been sore since using it for over a week now. He was on AY adex 1 mg ed before. I have him on 25 mg ed of the PP aromasin. I bought aromasin from PP in the past with no issues so not sure what's up. I have no bloodwork to verify. Just basing it on sore nips which may be nothing. My previous experience with PP was great. Not trying to bash, just giving honest review.