At The Maca Team, we highly value quality in all aspects of bringing potent and effective Maca to our customers. All of our products undergo rigorous independent testing before Certificate Of Analysis (COAs) are issued. In addition, although we work only with farmers who grow Maca in a traditional way without the use of any pesticides or chemicals, we do regularly check to make sure that the highest standards are maintained. On this page are samples of COAs for all of our products as well as samples of other types of testing we perform. One note: we do attempt to keep this page updated with our current with COAs, but sometimes COAs will overlap and you may have a Maca with a batch number that is not listed here. If you have any questions or concerns please let us know. We're happy to help.