James L. D'Adamo, N.D., D.N.B.




"So many people think that good health takes too much effort and that eating healthfully is monotonous, but I have news for you - illness requires both time and great exertion on your part."

James L. D'Adamo, N.D., D.N.B., originator of the famed Blood Type Diet®, founder and director of the D'Adamo Institute for the Advancement of Natural Therapies, has been a certified naturopath for 50 years. Trained in the United States, Germany and Switzerland, he has worked in New York, Montreal and throughout Europe.

Currently Dr. D’Adamo operates two highly successful clinics in Toronto Ontario Canada and Portsmouth, New Hampshire, USA.

Fifty years ago, Dr. James L. D'Adamo made a discovery that would revolutionize natural medicine -- establishing a correlation between a person's blood type and their dietary requirements, physical exercises, inherent strengths and weaknesses and what assets and liabilities we were all given at birth. It didn't stop there. With Dr. D'Adamo's tenacity and passion for healing he discovered sub blood groups and RH factors’ integral role in health and healing. The success of using the blood type and subtype along with his unique diagnostic tools proved that "you are what you eat."

Dr. D’Adamo’s revolutionary treatments bring patients to  the Institute from across North and South America, Asia, Great Britain and Europe. Among his clients are movie stars, royalty, politicians, medical experts and business leaders. 

Dr. James L. D'Adamo has appeared in numerous television and radio interviews exploring his blood type theory, and has lectured in the United States, Great Britain, Belgium and Canada. He is a teacher, researcher as well as the author of "One Man's Food . . . Is Someone Else's Poison" (1980), "The D'Adamo Diet" (1989), and the most recently released, groundbreaking  third book "Just An Ounce Of Prevention Is Worth A Pound Of Cure", released by Hayhouse Publishing in April 2010.

Since founding The Institute in 1980, Dr. James L. D'Adamo has worked with his team of specialists to create the most comprehensive and effective natural health care service in North America.

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What Our Clients Say:

I have been a patient of Dr. D'Adamos since the 70's. He is a genius and has helped thousands of people from all walks of life. His protocol works and is the most effective way you can nourish your body to maintain a long and prosperous life. It is not just a diet, or fad, it is a lifestyle. He is blessed with a gift and those who are ready to make a change will benefit greatly from it.