Synergy's Medical & Scientific Advisory Board is comprised of scientists and medical professionals who have taken a lead in the study and clinical application of heart healthy nutritional supplements.

With over a century of combined experience,these individuals bring substantial knowledge, experience, and expertise to Synergy’s ongoing commitment to scientific research and development of its heart healthy products. Synergy WorldWide is proud to introduce the members that comprise the 2011-2012 Medical & Scientific Advisory Board.

J Joseph Prendergast, M.D.

Dr. J. Joseph Prendergast is board-certified in endocrinology, internal medicine, and metabolism. He is the author of over 50 medical articles in well-known publications such as the Journal of the American Medical Association, The New England Journal of Medicine, and Diabetes Care. Dr. Prendergast has been recommending l-arginine to his patients since 1991 and has seen incredible results, both personally and with his patients. In 2007, Dr. Prendergast partnered with Synergy WorldWide and greatly contributed to the current formulation of ProArgi-9+.

Siva Arunasalam, M.D.

Dr. Siva Arunasalam is board-certified in internal medicine, cardiology, and interventional cardiology. He completed his internship at the Harbor UCLA Medical Center in Torrance, CA and his fellowship in cardiology at Cedars-Sinai Medical Center in Los Angeles, CA. In 1996, Dr. Siva founded the High Desert Heart Institute in Victorville, CA where he currently serves as the President and attending cardiologist. He and his surrounding staff of fellow cardiologists, nurses, and medical personnel are heavily involved in researching alternative, noninvasive solutions for improving heart health.

William J. Keller, Ph.D.

Dr. William J. Keller joined Nature's Sunshine Products (Synergy's parent company) in 2001 as the Vice President of Health Science and Educational Services. Prior to Nature's Sunshine, Dr. Keller earned a bachelor's degree in Pharmacy and a master's degree in Pharmaceutial Sciences from Idaho State University. In 1972 he was awarded with a Ph.D. in Pharmacognosy from the University of Washington.

Dan Austin, RN

Dan Austin, RN, has been a practicing nurse for over two decades, working primarily in the areas of critical care and emergency nursing. Currently he is the clinical coordinator for the congestive heart failure (CHF) outpatient clinic at the High Desert heart Institute in Victorville, CA. As the clinical coordinator, Dan works closely with Dr. Siva Arunasalam, M.D. in the planning and implementation of clinical research studies with l-arginine and critical care for their patients.