Since 1998, 4Life Research® has brought you the best quality products available to support your immune system and overall health. We are committed to ongoing innovation and scientific discovery, with products to help you lead a healthy life.*

4Life product formulations are developed through research and a commitment to the utmost quality and efficacy. The Certified 4Life Transfer Factor® guarantee ensures the identity, purity, strength, and composition of every 4Life Transfer Factor product that you consume.

The company’s in-house Research and Development team includes doctors and scientists who keep 4Life on the cutting edge of scientific advancement. Additionally, our Health Sciences Advisory Board (HSAB) assists in the development of new products and helps further research into 4Life Transfer Factor Science.

Products for Your Life

When you feel healthy, you can live your best possible life. To do this, you need a vigilant immune system. That’s why people are making the smart choice with 4Life Transfer Factor products.

The Science of 4Life Transfer Factor

4Life Transfer Factor Science encompasses the research, technology, and innovation of products that educate your immune cells, supporting your immune system’s ability to recognize, respond to, and remember potential threats. 4Life Transfer Factor products are patented, certified, and highly researched. 4Life Transfer Factor is sourced in three proprietary ways to provide a wide range of personal immune system support:

UltraFactor XF® is a proprietary concentrate of ultra-filtered 4Life Transfer Factor proteins and other peptides from cow colostrum.

OvoFactor® is a patent-protected concentration of 4Life Transfer Factor proteins and other peptides from chicken egg yolk.

NanoFactor® is a proprietary concentration of nano-filtered cow colostrum.

Product Development

4Life offers numerous delivery methods, including capsules, chewable tablets, juice beverages, powders, and topical products.

Quality and Labs


Prior to distribution, many 4Life products undergo hundreds of tests. Extensive testing ensures the utmost quality throughout a product's lifecycle. 4Life invests millions of dollars on state-of-the-art laboratory equipment and operates one of the most advanced analytical labs in the direct selling industry to test raw materials and finished goods.

4Life manufacturing facilities include cutting-edge packaging, encapsulation, and blending equipment and have received NSF® International Good Manufacturing Practices (GMP) registration. Earning GMP Registration from NSF International verifies that 4Life employs proper methods, equipment, and controls in producing the highest quality dietary supplement products.


4Life runs its own manufacturing facility and oversees each step of the manufacturing process. This includes, but is not limited to, batching, blending, encapsulating, and packaging.


The identity of each ingredient is tested and verified prior to use.


Each raw material and finished product is tested to ensure it is free of contaminants and other adulterants.


Every ingredient goes through a strict list of strength and potency testing to ensure specifications are met.


Each batch is manufactured according to the product specification guidelines and formulation.

To learn even more about the 4Life manufacturing and quality process, watch the Taking Transfer Factor to the World video.


4Life Research establishes product efficacy through collaborations with academic institutions, scientific publications, and exploratory research.

4Life has also partnered with the University of Missouri to conduct a fully-randomized, placebo-controlled, 30-day efficacy study on the effectiveness of Renuvo®.

The 4Life Research and Development team is committed to creating products that offer superior support for overall wellness through continued scientific exploration, while maintaining the highest standards of quality and testing.


4Life Patents

4Life's research and pursuit of patent protection demonstrate the company’s long-term commitment to exclusivity and stability. 4Life holds five U.S. patents and 38 international patents—with dozens more pending.

Studies and Publications


Research is in our name and is reinforced through our commitment to innovation, substantiation, and education. The results of this research have appeared in numerous publications and journals, including: Nutrition & Metabolism; Applied Physiology, Nutrition, and Metabolism; Journal of the International Society of Sports Nutrition; and Medicine & Science in Sports & Exercise.

Numerous studies have shown the effectiveness of 4Life Transfer Factor in supporting health.

Science Team

Expert research equals scientific success

Our in-house research and development team is comprised of immune science experts and PhD recipients working hard to keep 4Life on the cutting edge. We’ve also enlisted the expertise of dozens of physicians and nutrition experts worldwide, all members of the Health Sciences Advisory Board.


David Vollmer, PhD

Chief Scientific Officer

“The 4Life Research and Development team is committed to creating efficacious products of the highest quality for 4Life distributors and customers. Scientific credibility is at the core of what we do.”

Dr. Vollmer has enjoyed 20 years of experience in quality control and analytical laboratory management. His expertise includes technical and administrative leadership, stability testing, validation studies for new products, standard operating procedures (SOPs), production records, and product specifications. He received his PhD in Analytical Chemistry from the University of Nebraska and his Bachelor of Science degree in Chemistry from Missouri Western State University. Throughout his career, Dr. Vollmer has authored more than 20 published articles. He is the co-inventor on 12 patents involving the discovery of pharmaceutical drugs used for treating cancer and inflammation.

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Brent Vaughan, PhD, RD

Vice President of Research and Development

“4Life Transfer Factor products work together to provide some of the best immune system support currently available. Strength, focus, and coordination all in one place give your immune system its best chance for maintaining health and wellness.”*

Dr. Vaughan is a registered dietitian with nearly 17 years of experience in formulations and research within the dietary supplement industry. He holds a Master’s degree in Food Science and Nutrition from the University of Utah and a doctorate in Public Health and Epidemiology from Walden University in Minneapolis, Minnesota. Dr. Vaughan has been a Formulator and Researcher at 4Life for the past ten years. During this time, he has been instrumental in the development process for many top-selling 4Life products and has worked with distributors throughout the world.

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Shane Lefler, MS

Senior Director of Product Development

“I have always had an interest in nutrition and supplementation. Sound science and a commitment to quality are just the beginning of the effective support offered by 4Life Transfer Factor products. 4Life truly is impacting the way people live today.”

Shane has been at 4Life for more than five years and has played an integral role in designing and reformulating the company’s products. With a Master’s degree in Nutritional Science from the University of Utah, he has been instrumental in furthering our understanding of 4Life Transfer Factor, including its role in strengthening the immune system. Shane provides continual support to other 4Life departments through his work in research and development. Prior to 4Life, Shane worked as a data analyst at a genetics company that evaluated the hereditary risk factors for breast and colon cancer.

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Paula Brock, PhD, MSCI

Director of Scientific and Regulatory Affairs

“4Life provides the opportunity for people to live successful lives. Through science and service, we aim to deliver safe and efficacious products and education to assist in improving both physical and mental health and to help people achieve a positive lifestyle.”*

Dr. Brock has 14 years of experience in neuroscience and pharmacology. Her expertise includes teaching and mentoring, mechanism of action, safety and toxicity of biological compounds, analytical pharmacology, molecular biology, and personalized medicine. She received her Bachelor of Science degree in Chemistry, Master of Science degree in Clinical Investigation and PhD in Pharmacology and Toxicology from the University of Utah. Prior to living in the United States, Dr. Brock attended the College of Pharmacy in Brazil. She has contributed to numerous scientific publications, presentations, and lectures. Dr. Brock has received awards from the Howard Hughes Medical Institute, the American Foundation for Pharmaceutical Education, the American Society for Pharmacology and Experimental Therapeutics, and several others.

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Health Sciences Advisory Board

Robert Robertson

Robert W. Robertson, Jr., MD

“4Life Research is well-known in the nutraceutical industry as the leader in transfer factor research. If new discoveries are made, one can rest assured that the scientists at 4Life will be at the forefront.”

Dr. Robertson is the founding member of the Health Sciences Advisory Board and an active 4Life distributor. Following a lucrative career as the Director of Emergency Services at Western Baptist Hospital in Paducah, Kentucky, Dr. Robertson and his son Rob Robertson, III decided to start a nutritional supplement company. It was while conducting product research for their company that the two discovered the many benefits of transfer factors. Convinced of the importance of 4Life’s mission, they sold their company and became distributors. Dr. Robertson completed his education at the University of Louisville School of Medicine and worked as an intern at the University’s affiliated hospitals.

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Duane Townsend

Duane Townsend, MD, FACOG

“In my 50 years of medical practice, 4Life Transfer Factor products have, without question, made the most significant impact on me and my patients. 4Life’s discovery of the power of nanofraction molecules stands out as a major medical breakthrough.”*

Dr. Townsend is a board certified OBGYN, specializing in gynecologic oncology. He was a professor at University of California, Los Angeles, University of Southern California, and University of California, Davis. He has introduced several unique ideas to medicine, including cryosurgery, nurse practitioners, and endometrial ablation. Dr. Townsend has authored numerous chapters in medical textbooks and co-authored nearly 100 articles in peer review journals. He still actively practices medicine, blending alternative methods with the conventional approach. He attributes his incredible health to 4Life Transfer Factor.

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Edgar Guess

Edgar A. Guess, Jr., MD, FACOG

“Transfer factors and nanofraction molecules, and the immune modulation they provide, could be the key for the future of immune system health.”*

Throughout his career, Dr. Guess has actively participated in pharmaceutical research. His studies soon drew to an intensive study of herbal, natural, and alternative methods of preventative medicine. Dr. Guess attended graduate school at Creighton University in Omaha, Nebraska. Following graduation, he was inducted into the U.S. Army and spent three years stationed at the Walter Reed National Military Medical Center in Washington, D.C. He then attended the Howard University College of Medicine and received his Board Certification from Harvard University. After many years of operating a successful OBGYN practice in Los Angeles, Dr. Guess now serves as a clinical professor at the University of Southern California, Keck School of Medicine where he enjoys consulting with patients and working with students.

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Teresa Tomalska

Teresa Tomalska, MD

“It seldom happens that one scientific discovery can bring such huge benefits to support the health of every human being. I firmly believe that 4Life Transfer Factor products hold the secret to optimal immune system function.”*

Dr. Tomalska completed her medical training at the Medical Academy of Lublin in Poland. She came to the United States several years ago, intending to only stay for a short visit. Right before leaving, she was introduced to 4Life. Dr. Tomalska decided to stay and devote herself full-time to teaching people about supporting good health. In an effort to further this cause, Dr. Tomalska currently hosts two informative radio shows called “Balsam” and “Toward Health” in Chicago, Illinois, and publishes a monthly newsletter entitled “To Your Health.” She also organizes seminars on topics such as women’s health, cardiovascular health, and health for Polish families.

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Said Daibes

Said Daibes, PhD

“4Life Transfer Factor is an outstanding source of immune system support. Understanding the value of transfer factors and how they promote better health is of continued interest to me. The 4Life science team is committed to advancing sound scientific-based research for generations to come.”*

Dr. Daibes graduated from the School of Health Professionals at the University of Missouri with a Radiological and Nuclear Medicine degree. He has served as an Assistant Professor teaching at the undergraduate and graduate level. Dr. Daibes has authored and co-authored over 45 research publications, over 55 scientific abstracts, and one book chapter in applied diagnostic sciences. His research interests include molecular imaging and its applications.

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MeiLing SiuCaldera

Mei-Ling Siu-Caldera, MD, PhD

“Good nutrition is the foundation for physical and mental wellness.”

Dr. Siu-Caldera is a medical doctor who has done extensive research on the benefits of vitamin D in cancer treatment. She provides nutrition counseling with a focus on weight management, dietary and lifestyle modification, cardiovascular health, and sports nutrition. Dr. Siu-Caldera graduated from the University of San Carlos in Guatemala and received her PhD in Nutrition from the University of Connecticut, Storrs. She has published more than 20 peer-reviewed research papers and contributed articles in newspapers and magazines to increase public awareness on nutrition health.

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Ty Hopkins

J. Ty Hopkins, PhD, ATC

“4Life is committed to scientifically vetting the development of their products, as well as using only high quality ingredients and maintaining the highest quality control. In an industry where most companies are not committed to this type of quality, 4Life stands out. As a scientist and an athlete, I am happy to recommend 4Life products to those who would like to supplement their healthy lifestyle and strengthen immune function.”

Ty Hopkins is currently a professor at Brigham Young University, where he coordinates the graduate programs in athletic training and physical medicine and rehabilitation. Dr. Hopkins graduated from Brigham Young University with a BS in Athletic Training. His graduate work was completed at Indiana State University where he earned an MS in Athletic Training and a PhD in Life Sciences.

The focus of Dr. Hopkins’ research centers on joint health: prevention and rehabilitation of lower extremity joint injury. He has produced over 70 peer review publications and he has presented his work nationally and internationally hundreds of times. He enjoys working with students in the laboratory and regularly uses his work from the laboratory in the classroom.

Dr. Hopkins serves as an editor for the Journal of Athletic Training, and he serves on editorial boards and as a reviewer with many other journals and granting agencies. He is also a Fellow with the National Athletic Trainers’ Association and the American College of Sports Medicine.

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Ty Hopkins

Joy Irobi, PhD

“4Life Transfer Factor® serves to teach our bodies to efficiently support us as we face daily life stressors. I find it exciting to join the team of scientists who will develop the next generation 4Life products to support health and other concerns.”*

Dr. Irobi earned her doctorate in the field of molecular genetics, and spent 17 years as the lead researcher for the internationally renowned University of Antwerp’s Department of Molecular Genetics. Currently, she is a research professor of medicine and life sciences in the Biomedical Research Institute (BIOMED) at Hasselt University in Belgium. Dr. Irobi’s group at Hasselt University focuses on deciphering the neuroprotective biomarkers in exosome or extracellular vesicle signaling in neuro-inflammation. Irobi has produced more than 30 publications and has won numerous awards for her contributions to the field of biomedical sciences.

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