Choose products from well-established companies. Read customer reviews and choose a product with a respectable following, rather than a new brand no one has heard of before. Also, research the product online to learn more about it. Choose a brand of CBD that makes it easy to access their third-party lab results, which will show the purity and potency of the CBD product you're using, as well as information like the amount of THC in the product. You can even call the company to ask them about their practices if you can't find the information online. Finally, talk to the store owners and ask them about the company. For instance, you might ask them if they've heard anything about the brand, whether they've used that brand themselves, or if other customers have given them any feedback on the products.