Arimidext 1 , X-T-Labs* This is by far the best anti-estrogen i have ever seen on paper. It’s great. Nipple puffiness is completely gone, test subject no longer lactating any type of progesterone, and this product only needs to be taken twice a week. This product arrived fast and safely. NapsG customer service made sure to answer all questions on point! They have always updated the tracking numbers. They had shipped the package successfully and without issues. I would recommend this product to any test subjects looking to block estrogen out. Naps For the win!