There are two key ways to tell if CBD products are legit. Before you buy CBD oil, first look at the ingredients and confirm that it includes cannabidiol or hemp extract. Products that include other hemp or cannabis matter without cannabidiol or hemp extract specifically may not actually contain CBD. Second, look for CBD products that provide a certificate of analysis, or COA, from a third-party testing laboratory. Using the COA you can confirm that the ingredients and quantities are what the product labels claims, as well as know if any contaminants are present and at what levels.