Advisory Board

We Stand Behind the Research in Metabolic Research Center

Metabolic Research Center's weight loss programs were created by board certified physicians, research scientists and registered dietitians who wanted to design medically sound, evidence based weight loss programs which allow individuals to maintain a healthy lifestyle. We approach the science of weight loss and weight management from a clinical, research-based perspective. Our programs are based on decades of scientific research in the fields of medicine and nutrition. We strive to provide excellent customer service through personalized weight loss programs with a focus on supporting our client's health. It is our goal to stay current with the latest research related to weight loss, psychology, hormones and nutrition. Our Medical Advisory Board is comprised of a wonderful group of experts in all of the areas that impact your weight loss journey, including board certified physicians, registered dietitians, nurse practitioners and licensed clinical social workers. Our 70+ weight loss centers are individually owned and operated throughout the United States.

Arthur Browning, MD

Medical Director

Dr. Authur “Buster” Browning is Family Physician in Jacksonville, FL with almost 4 decades of experience. He specializes in preventative care and wellness, with a focus on dementia. Dr, Browning has helped guide the direction of MRC, as our Medical Director, for over 25 years. His experience taught him that losing weight is about so much more than just changing what you eat or simply counting calories; he believes effective weight loss requires a holistic approach that includes nutritional advice, 1-on1 support, motivation and education. Dr. Browning reviews and advises on MRC weight loss programs and our medical protocols ensuring our programs are not only medically sound but also effective. Dr. Browning knows firsthand the benefits of the MRC weight loss program; he was once a client and lost 25 pounds following the program. He says, “The program helped me lose weight, regain control of my eating habits and feel good again. That's why I accepted the position as MRC Medical Director, because I believe in the program and know that it was safe and medically sound.”

Clint Van Nagel, PhD

Dr. Clint Van Nagel received his Ph.D. from the University of Pittsburgh. Dr. Van Nagel has lectured both nationally and internationally. His work with competency-based training programs won the American Association College Teacher Education Award in 1979 and the Florida Teacher Education Award in 1980. His research on vocational training was selected by the Michigan Project (funded by the U.S. Department of Labor and Justice) to be filmed and disseminated throughout the United States. In 1989, Dr. Van Nagel received the Nation University Continuing Education Award for his outstanding presentations and program development. In 1990, he was selected by students and colleagues at the University of North Florida to receive the Outstanding Teacher Education Award. In 1993, he was chosen as a recipient of the Creative Programming Award by the Conferences and Institutes Division of the National University Continuing Education Association for his program, Dealing With Angry and Emotional People: For Law Enforcement Personnel. Dr. Van Nagel has state, national, and international publications that deal with training individuals for increased performance and achievement. He has presented his research and training methods to nine international associations and has conducted over 800 seminars that deal with the development of human potential. Dr. Van Nagel was selected by seven major state associations to be their keynote speaker. Dr. Van Nagel stays abreast of the latest trends in corporate training and delivers insight into those trends. He is considered by his peers to be on the forefront of leadership and executive training, and he is one of the most sought after trainers in the United States because of his innovative teaching strategies and his ability to communicate to different people on different levels.

A partial list of Dr. Van Nagel's clients includes; CSX, Blue Cross/Blue Shield, Florida Department of Law Enforcement, Florida Department of Environmental Protection, AT&T, International NLP, Federal Reserve, St. Luke's and Baptist Hospitals of Jacksonville, Florida, Charter Hospital of Georgia, Georgia Psychological Education Centers, and Prudential Securities. Dr. Van Nagel's goals are to simplify the complex and to improve the quality of life for all.

Allan N. Spreen, MD

Though Dr. Spreen’s interest in nutrition and health began in his teens, it was the affliction of a family member that turned this interest into a passion, and ultimately his profession. A competitive springboard diver at Georgia Tech, he was personally affected by the connection of health and performance. Later, as he transitioned from athlete to coach in the 1970s, he enlightened other athletes eager to maximize their own physical performance. So, when his sister was diagnosed schizophrenic as a sophomore in college and the mainstream medical community offered no hope of recovery, his family was unwilling to accept that she would spend the rest of her life institutionalized. Instead they sought alternatives, eventually finding Canadian physician Abram Hoffer, MD/PhD, who treated schizophrenics with high doses of B-3 and other supplements. As Dr. Spreen watched his sister recover, and subsequently attend law school and begin her law practice, his enthusiasm for non-conventional health therapies intensified. His sincere desire to understand and fairly evaluate both conventional and alternative therapies eventually led to him to a degree from East Tennessee State University medical school in 1982.

In his private practice, limited primarily to nutritional therapies, he counseled patients who preferred alternative options to traditional allopathic techniques. He often found that his weight loss patients were those most likely to follow his recommendations. Like the athletes he coached, their progress in health was measurable: they lost weight, felt better physically, and felt better emotionally about themselves. Dr. Spreen’s background in successful weight loss with his own protocols, supplements, and clinical trial evaluations has made him a unique asset for MRC.

In 1995, to allow him more time for research and coaching, he launched “The Nutrition Physician,” an information service for alternative and complementary medicine. Soon after authoring his signature books: Nutritionally Incorrect, written in his uniquely humorous style, and the bestselling collaboration with Dr. Janet Zand, Smart Medicine for Healthier Living, Dr. Spreen accepted a position as Director of Scientific Research with Metabolic Research Centers. Always on top of the latest in health research, he evaluates products and works with our other on-staff experts to offer optimal results, while proposing alternative products and formulas to better serve our clients.

Dr. Spreen believes we can all improve our health and we can all reach our optimal weight. Many question the expense and necessity of supplementation in a weight loss program. Dr. Spreen explains that the foods we eat do not have the nutritional value of the foods our grandparents and great-grandparents either raised themselves or to which they had ready access: “Large scale fertilizers, pesticides, and hybridization have wrecked the quality of our food supply. Organics are not always available, nor affordable. Our environment has more pollution and our culture more stress than in ‘the good ol’ days’. Smart supplementation can help a body overcome many of the stresses of modern life and begin to improve overall health. That is what I hope to offer all MRC clients.”

Dr. Spreen’s guidance has been valuable to MRC in both the past, present, and into the future.

This program is amazing!! I've never stuck with a plan more than a week - now I'm almost 3 months in - 28 pounds and 48 inches smaller!!!


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