Transfer Factor is a protein molecule extracted from colostrum that boosts the immune system by 248% and is helping cancer patients. I would be happy to supply testimonies, a video cd by a medical doctor and printed information. Transfer Factor is listed in the Physicians Desk Reference Manual for Nonpescription and Dietary Supplements. Transfer Factor is patiented. Listen to a recorded toll free telephone message given by a medical doctor. 1-866-315-4002 Questions and requests for information welcome. nptra@wenval.com