This is as much for our own quality control as it is for the benefits of consumers. Wherever you purchase your CBD products, you should always do your own due diligence to avoid fake or low-quality products and to prove the manufacturer’s products have as much CBD as advertised. That means always checking the Certificate of Analysis. A Certificate of Analysis, or COA, is a document from an accredited laboratory that shows the quantity of various cannabinoids in a product.  If a manufacturer cannot provide one, then we advise caution.