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 > Doctors’ senior investigative producer Leslie Marcus tests the claims surrounding vitamin B12 injections with Monique, Brooke and Jennet. Did these women benefit from the injection and were they even B12 deficient in the first place? ShareTweet