Most supplement ingredients have a marketing story. Transfer factors have a scientific one — and it starts in a New York hospital in 1949.
1949: the Lawrence experiments
Dr. H. Sherwood Lawrence, an immunologist at New York University, was studying tuberculosis immunity when he observed something remarkable: an extract taken from the white blood cells of a person with immunity could transfer a delayed-type sensitivity response to someone without it. Whatever carried that immune information, he called a transfer factor.
It was a bold claim for its era — decades before immunology had the tools to characterize small peptides — and it set off years of research into what these molecules were and how they worked.
The decades in between
Through the 1960s–80s, researchers around the world published studies on transfer factor preparations, exploring the low-molecular-weight fractions of immune cells and colostrum. Two properties made the field especially interesting: the molecules appeared to be not species-specific — immune information from a cow or chicken could be relevant to human immune cells — and they were small and stable enough to survive processing.*
1998: 4Life Research is founded
David and Bianca Lisonbee founded 4Life Research to commercialize transfer factor supplementation, launching the original Transfer Factor® Classic — colostrum-sourced peptides in a daily capsule. Patented extraction processes followed, then OvoFactor® (egg yolk sourcing) and the combined Tri-Factor® Formula that powers today's Tri-Factor® and Plus.
2025: the plant-based breakthrough
The newest chapter: after screening more than 100 high-protein plants, 4Life researchers identified transfer factor peptides in Brassica napus seeds — PhytoFactor™, the first plant-based source, now featured in the reformulated Transfer Factor® Max. Seventy-five years after Lawrence's experiments, the science is still moving.
Why the history matters when you shop
Plenty of immune supplements were invented in a marketing meeting. Transfer factor research predates the supplement industry as we know it, and 4Life has built patents, publications, and a cGMP manufacturing operation on top of it. That's the difference worth understanding before you buy — and it's why we wrote an honest overview in Are 4Life Products Legit?
Want the mechanism rather than the history? Start with the Immune Science page or the complete guide. Every order ships free, and we cover the sales tax.
About this article: Written and maintained by Kevin Moore, owner of 4LifeTransferFactorProducts.com and an independent 4Life Affiliate. Historical information reflects published accounts of transfer factor research and 4Life Research's company materials. Last reviewed: August 2026.
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.
