Meet Our Professional Team

Garth Denyer, M.D.

CEO & Institute Physician

Dr. Garth Denyer graduated from the University of Cape Town in South Africa in 1973. From 1973 until 1978, he completed his residency in internal medicine in South Africa and Canada. In 1981, he moved to The Woodlands, TX, and started the Oaks Medical Center where most of his practice centered on internal medicine.He became a Cenegenics patient over ten years ago, and because of the personal success he had, he started taking an active interest in age management. He completed the Cenegenics training and certification process and opened his office in The Woodlands in 2007. On July 1, 2011, he became a Cenegenics partner and officially opened Cenegenics Medical Institute of Houston. In his ongoing quest for knowledge, he has attended many motivational conferences to learn more about positively influencing his patients’ habits to help them change and meet their personal health goals.

Dr. Denyer is 66 years old, is 6’2”, and weighs 195 lbs. with 10% body fat. Other than his regular resistance and strength training, he plays racquetball and windsurfs in the spring.

Dr. Denyer and the Cenegenics Houston team are committed to providing five-star service and helping patients achieve optimum health and well-being.

Iryna Voyutska

Nutrition & Exercise Counselor

Iryna received her Physician Assistant degree with honor in 1985 and received her M.D. degree in 1998 from Odessa State Medical University, one of the leading medical universities in Ukraine. The school is a member of the International Association of Medical Universities, and the high standards of training at the institution are well recognized throughout Europe and America. With such a diverse student population, education is given in Russian, Ukrainian, and English languages.

During her studies, Iryna trained in Track & Field and was the fastest runner at the college from 1982 to 1985.

She also won the bronze medal for the county collegiate 400-meter race in 1985.

She has worked as a school physician for athletics, giving lectures about the importance of body composition, microelements, vitamins, and antioxidants as natural enhancers in sports competitions.

Since moving to Houston in 2006, she has continued her education in pathology, biochemistry, immunology, behavioral science, and clinical applications for age management medicine. She began her work with Cenegenics in 2008, focusing on patient assessments and customized nutrition and exercise plans.

Steven A. Fein, MD, FACG

Center Physician

Board certified in Gastroenterology, Internal Medicine, Advanced Bio-Identical Hormone Therapy and Age Management Medicine. Dr. Steven A Fein attended medical school at the University of Florida. He did his Internal Medicine training at Baylor College of Medicine and his Gastroenterology training at the University of Texas Medical School. Dr. Fein has been practicing Internal Medicine/Gastroenterology in the Houston area since 1981.

Dr. Fein has achieved great success as a patient on the Cenegenics Elite program over the last 2 years. It is his success on the program that has motivated him to practice Age Management Medicine with Cenegenics Global Health.

Jamie Crowe

Center Service Coordinator

Jamie Crowe has called Houston, Texas her home for over a decade. Originally from Louisiana, Jamie holds a degree in Communication Studies and has an extensive background in Customer Service. She previously worked as a recruiter for over 10 years and was eager for a new opportunity to demonstrate her passion for people and helping others. Jamie is excited to bring her experience and talents to Cenegenics as the Center Service Coordinator for Cenegenics Houston.