eVo eLiquid is formulated using only current Good Manfacturing Practices (cGMP) in an FDA registered facility. Every ingredient of the eliquid base is tested to USP standards to ensure purity and safety of the products. In addition, the nicotine concentration of every finished batch is verified by HPLC and NMR to ensure the safety of the user. All approved batches are issued a final Certificate of Analysis for cGMP release from the lab and assigned a unique batch code for tracking further down the supply chain. eVo ejuice offers it's customers quality assurance by making eliquid "the right way".