Meet Our Doctors

Board-certified doctors, who spend time working in the field and shaping the future of medicine, are the only people you can truly trust with your health. That's why 1MD Nutrition™ is proud to work with top physicians. These doctors care deeply about bettering the lives of people through research, study and clinical practice.

Dr. Heather Shenkman Cardiology

Dr. Heather Shenkman is a board certified interventional cardiologist. She completed a six year program at Albany Medical College, graduating at the age of 23. She completed her residency at Henry Ford Hospital, cardiology fellowship at the University of Rochester, and interventional cardiology fellowship at the esteemed Tufts Medical Center in Boston.

Learn More
Dr. David Kahana Gastroenterology

Dr. David Kahana is board certified in Pediatrics and Gastroenterology through the American Board of Pediatrics (ABP), as well as Medical Nutrition through the National Board of Physician Nutrition Specialists.

Learn More
Dr. Daniel Brison Urology

Dr. Daniel Brison is a board certified urologist who completed medical school at the State University of New York, and residency at the prestigious Endourology fellowship program at UCLA.

Learn More
Dr. Brian Greenberg Allergy & Immunology

Dr. Brian Greenberg is an immunologist, allergist, and pediatrician who received his medical degree from the University of Florida, and completed his residency and fellowship at UCLA. He has practiced medicine in Southern California for almost 25 years.

Learn More
Dr. Alexander Zubkov Neurology

Dr. Alexander Zubkov is a board-certified Neurologist specializing in functional medicine. He completed his medical program at St. Petersburg Medical University, a 2-year fellowship at the Mayo Clinic, and internship and residency training at University of Mississippi Medical Center.

Learn More
Dr. Adam Kreitenberg Rheumatology

Dr. Adam Kreitenberg is dual board-certified in both rheumatology and internal medicine. He completed his internal medicine internship, residency, and rheumatology fellowship at the University of Southern California and Los Angeles County Medical Center.

Learn More