A Certificate of Analysis, or COA, is a document from an accredited lab that certifies various cannabinoids in a product. Manufacturers must send each batch of every product they make to the labs for testing. This regulation aims to protect customers from harmful products. nnYou should protect yourself from low-quality Cannabidiol products, always checking the Certificate of Analysis. These days, most CBD products come with a QR code on the label, which you can scan and get redirected to the webpage with the COA. Most smartphones can scan the QR code through some apps, such as a QR code scanner. nnIf you can't get a COA from the manufacturer's website, then the product is probably not right. A quality product will always go through multiple tests before landing on the market.