The CBD supplement industry appears to be in trouble. In February 2015, the FDA sent warning letters to companies producing 18 CBD products, some of which testing showed had no CBD in them.
From the FDA website
In late February 2015, FDA issued several warning letters to firms that market unapproved drugs for the diagnosis, cure, mitigation, treatment, or prevention of diseases. Some of these firms claim that their products contain cannabidiol (CBD). FDA has tested those products and, in some of them, did not detect any CBD.
It is important to note that these products are not approved by FDA for the diagnosis, cure, mitigation, treatment, or prevention of any disease, and often they do not even contain the ingredients found on the label. Consumers should beware purchasing and using any such products.
You can find the list of companies here
Then in March, 2016 the FDA stated that because it now considers products containing CBD to be "new drugs" that they are not supplements; therefore CBD is no longer allowed to be added to supplements.
Find out more here.