Nathan S. Bryan, Ph.D.

Dr. Bryan is an international leader in molecular medicine and nitric oxide biochemistry.

Specifically, Dr. Bryan was the first to describe nitrite and nitrate as indispensable nutrients required for optimal cardiovascular health. He was the first to demonstrate and discover an endocrine function of nitric oxide via the formation of S-nitrosoglutathione and inorganic nitrite.


Dr. Bryan has been involved in nitric oxide research for the past 18 years and has made many seminal discoveries in the field. These discoveries and findings have transformed the development of safe and effective functional bioactive natural products in the treatment and prevention of human disease and may provide the basis for new preventive or therapeutic

Dr. Bryan has published a number of highly cited papers and authored or edited 5 books.


Book Testimonials

  • Dr. Nathan Bryan has taken a complex situation and given the reader the foundational knowledge needed understand the critical contributions of nitric oxide to our health. Everyone caring about wellness should read this book - it is a fantastic guide to healthy longevity through maintaining our nitric oxide levels.
    Felice Gersh M.D.
  • Dr. Bryan has performed a masterpiece of literary genius in his new book “Functional Nitric Oxide Nutrition". The importance of nitric oxide in health is considered one of the most important medical discoveries of the last 100 years. This book will take the reader on a simple and clear journey of how to understand and use nitric oxide to maintain health and longevity. Each chapter is well organized and the flow from one concept to the next is smooth and effortless for the reader. Few books transform complexity to singular clarity as this one does.  I recommend this excellent book to all my patients and to medical professionals that wish to enter into an education of nitric oxide.
    Associate Clinical Professor of Medicine
    Vanderbilt University Medical School
    Director, Hypertension Institute and Vascular Biology
    Medical Director of Division of Human Nutrition
    Saint Thomas Medical Group, Saint Thomas Hospital
    Nashville, Tennessee
  • The discovery of Nitric Oxide hormone by three great individuals in 1998 became a landmark in science. Nathan Bryan is a rare basic scientist of Nitric Oxide who is committed to sharing with us how best to get this molecule through food, nutrition, probiotics as well as a pure synthesized molecule in the form of a medicine. His persistent research collaboration with medical doctors and his efforts to reach the public is a real service to mankind. This book is a “must read” for all interested in the cardiovascular system as well as its far reaching effects on cancer, other hormones and the powerful small organelle the Mitochondria.
    George Yu M.D.