Here's info on the product:
"The raw anasrozole has been tested, yes. The finished product, no. I have not needed to as I have instruments that will measure .1mg amounts, which is very small when being made into a large batch. The powder amount (which is
tested to be 98.9%) put in is designed to be %110 of claims, to account for minor fluctuations. Liquid solutions, however, have a much better dispersion factor than tabs and thus it is easier to ensure that the product is uniform in manufacture."