This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page. Embed Code Restart Playing WATCH MORE VIDEOS FROM THIS EPISODE > Dr. David Katz, chief medical advisor for Direct Digital, LLC, explains how joint pain develops and how a new supplement, Instaflex, is helping sufferers reduce inflammation and, most importantly, fight pain. ShareTweet