The FTC teamed up with the U.S. Food and Drug Administration, sending warning letters to three companies: NutraPure, LLC, PotNetwork Holdings, Inc., and Advanced Spine and Pain LLC (d/b/a Relievus) that advertised CBD supplements as treatments for serious diseases such as cancer, Alzheimer’s disease, fibromyalgia and “neuropsychiatric disorders.” The two agencies told the companies to steer clear of false or unsubstantiated health claims and instructed the companies to notify the FTC within 15 days of the specific action taken to address the agencies’ concerns.