Transfer Factor is the foundation of most all of our products and is our Flagship Product. Transfer factor educates your immune system to recognize, respond to, and remember threats to your immune system. Transfer Factor cannot be found in the same form from any other company. It is an important maintenance supplement for everyone. Woman, Children, Men and even animals should be taking Transfer Factor from 4Life to support their immune system. It will increase your immune defenses by a minimum of 283% and as much as 437% when the herbal elements are added back into it.