USANA’s Scientific Experts

USANA’s world-class scientists review the latest scientific literature and clinical studies on important nutrients, vitamins, minerals, and phytochemicals. They also test the potency and purity of every USANA product to ensure complete and balanced formulas. USANA scientists come from varying fields of expertise, and most have published numerous papers in their careers.

John Cuomo, Ph.D.
Executive Director of Product Development and Technology
Dr. John Cuomo’s experience in synthetic organic chemistry, manufacturing, and analytical methods make his contribution to USANA invaluable. He holds over 20 United States and European patents and is the author of numerous scientific papers. "There are several areas that I think set USANA apart from other nutritional companies," Dr. Cuomo says. "The first is USANA's quality assurance in product development and manufacturing. Few companies have the level of quality control that USANA does. We spend a tremendous amount of time and money making sure that product composition exactly matches what's on the label. One of the ways we do that is through our in-house testing of ingredient potency."

Dr. Cuomo has seen many other companies include product lines solely based on the marketability of the products. "We won't jump on the bandwagon to join the latest health craze simply to make a profit."

Mark Brown, Ph.D.
Director of Product Development

Dr. Mark Brown has completed extensive research in bioorganic chemistry and holds a Ph.D. in organic chemistry from the University of California and a bachelor’s degree in chemistry from California State University, Chico. With more than 15 years of chemistry experience, he is a valuable member of USANA’s scientific team.


Brian Dixon, Ph.D.
Executive Director of Health and Science Education

Dr. Brian Dixon joined USANA’s department of research and development in January of 2009. As an integral member of USANA’s scientific staff, Dr. Dixon’s main role was to facilitate and manage all human clinical studies conducted at, and funded by, USANA. In November of 2014, Dr. Dixon was asked to head up the newly formed department of health and science education as its executive director, where he continues to lecture internationally on the importance of nutrition for optimal health.
Dr. Dixon earned his PhD in molecular and cellular biology from Oregon State University, where he focused his research on the underlying biochemical mechanisms of the aging process and the therapeutic potential of R-alpha lipoic acid.

Keijun Koh
Product Development Manager

Ms. Keijun Koh is a licensed pharmacist, who previously worked at a biochemistry laboratory as well as one of the leading trading companies in Japan, where she oversaw regulatory affairs and product development. Ms. Koh joined USANA Japan in 2003 and has since relocated to USANA’s Home Office in Salt Lake City, Utah. She currently focuses on the development of products for USANA’s Asia Pacific markets.

Jim Eng

Jim Eng
Senior Formulator

Mr. Jim Eng has been with USANA Health Sciences since 1996 and is currently the R&D Project Manager. He holds a bachelor of science degree in chemical engineering from New Jersey Institute of Technology and has more than 27 years of experience in the pharmaceutical and nutritional industry. As project manager, one of Mr. Eng’s primary functions is to transform research and development ideas into high-quality nutritional products.


Sean Surbeck
Director of Food Product Development

Mr. Sean Surbeck has more than 10 years of research and development experience in the food industry. He earned a bachelor of science degree in food science from Louisiana State University. His primary roles at USANA are to insure that all food products adhere to USANA’s high-quality standards and to develop new foods.

USANA Health Sciences is known for manufacturing the highest quality products backed by a potency guarantee. To ensure you and your family are receiving genuine world-class USANA products, purchase them only through your independent USANA Associate or
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