Transfer Factor Pack A healthy immune system requires the right doses: a balanced diet, regular exercise, effective stress management, and... vitamins and minerals* combined with 4Life Transfer Factor. True to our motto, "The Immune System Company," we bring you an unmissable offer: the exclusive "600 mg 4Life Transfer Factor Pack". This pack provides you with products containing a 600 mg daily dose or more of 4Life Transfer Factor, our formula that connects with your immune system within just 2 hours. *Vitamins C, D, B6 and zinc contribute to the normal functioning of the immune system. Vitamins C, B2 (Riboflavin) and zinc help protect cells against oxidative stress.