Zayd Ratansi, ND

Dr. Zayd Ratansi (known as “Dr. Z” to his patients and colleagues) is a licensed Naturopathic Physician and a global authority on hyperbaric, bio-oxidative, and environmental medicine, as well as low-level light and chelation therapies. He is a trainer for hyperbaric oxygen therapy, has an IHA-approved education and training course for safety and operation, and he has established and manages a research-based website for hyperbaric therapy at

Dr. Z provides concierge support for clinics to integrate hyperbaric therapy into their practices and for their specialty services. He lectures worldwide on the use of hyperbaric oxygen therapy for neurological conditions and has played a leading role in implementing protocols on the use of hyperbaric therapy in the mainstream medical setting. He has advised and trained many sports clubs and athletes, including the Seattle Mariners of Major League Baseball, to implement hyperbaric therapy within their medical departments.

Dr. Z also worked with boxing legend Muhammad Ali to help him fight Parkinson’s disease. He serves as an advisor to athletic trainers, team doctors and practitioners, and elite athletes to help implement personalized protocols for performance training and recovery. He also has extensive training in environmental medicine and has helped implement safe detoxification and cleansing programs along with hyperbaric oxygen therapy within the spa industry, helping to advance Medical Spas throughout the world.