There is no source checking but I want to let you know I had and sometimes still do have your same exact question. Its easy to get gear but almost always a pain in the ass to get an ai or serm, seams backwards right? Your best bet is to "troll" around this site for a while. Thats probably not the best word to use but I've found decent research chems to use by that means. A domestic pharmuceutical grade ai, serm, and other ancilleries place would be incredible, but your not gonna find it with one post on your record.To this day I have still not found a place to get actual pharm grade pills(which I assume your looking for). And its been years for me. Find a trustworthy chem research site for now(there around if you look) and hope in the near future someone pms you with a legit pharm grade supply. Hell, it hasn't happened to me yet. Good luck and look through some of the trustworthy moderators posts for a solid source, thats your best bet for the time being.