In an effort to bring transparency and standardization to this industry, the PURE SPECTRUM posts the test results for all products including CANNABIDIOL OIL 500MG right on their website for the world to see. When using any product, it is important to know exactly what you are buying. PURE SPECTRUM is happy to take any questions you might have about this and we hope our products help you as much as they help us. Thank you for your support! Check our latest test report here!