"Airborne Health, Inc., the Bonita Springs, Florida maker of the popular Airborne Effervescent Health Formula, an effervescent tablet marketed as a cold prevention and treatment remedy, has agreed to pay up to $30 million to settle Federal Trade Commission charges that it did not have adequate evidence to support its advertising claims."

https://www.ftc.gov/news-events/press-releases/2008/08/makers-airborne-settle-ftc-charges-deceptive-advertising