The FTC sent letters to another thirty marketers, warning them to stop making unsubstantiated claims that their products and therapies can treat or prevent COVID-19. The majority of the letters targeted treatments, including intravenous (IV) Vitamin C and D infusions, supposed stem cell therapy, vitamin injections, essential oils, and cannabidiol products. The letters advise the recipients to immediately stop making all claims that their products can treat or cure COVID-19 and to notify the FTC within 48 hours about actions taken to address the regulator’s concerns. Additionally, the letters note that if the false claims do not cease, enforcement action may ensue.