Welcome to the D’Adamo Institute for the Advancement of Natural Therapies. Over 30 years ago, I wrote “One Man’s Food is Someone Else’s Poison” about my work correlating blood groups and nutrition. It was my first book—and the first book ever written about my research and the successful treatment of thousands of patients through what was then a revolutionary approach to healing. Today, the idea of blood groups and diet has traveled around the globe, and many thousands of people have improved their health by following a diet and lifestyle based on their type blood.

In my second book, “The D’Adamo Diet,” I refined my diagnostic approach as I discovered that sub-blood groups, too, played a significant role in determining what a person should eat for their individual needs.

After working with and treating over 50,000 patients, I thought it was important to provide the public with my most up-to-date research  on blood types and diet, information that you can use to not only  treat illness and disease—but prevent them from ever developing in your body.

“Just an Ounce of Prevention is Worth a Pound of Cure” is the most extensive book on my work. When I completed it,  I wrote a letter to a former patient, Louise Hay, who you may know as the author of the bestselling book “You Can Heal Your Life,” which has over 35 million copies in print, and whose company, Hay House, is a leading publisher of inspirational and books on healing. I asked her if she would be interested in publishing my book. You can hear her explain why she thought it was so important to publish and offer it to the public in the video to the right.

“Just an Ounce of Prevention . . .” is the culmination of my life’s work. It captures my understanding of the way Nature generates our vitality, and how we can work with Nature to maintain our well-being. I also describe how we can create the environment within ourselves to allow Nature to heal us when we are ill. I hope you will accept this book in the spirit in which it was written, and share it with your family, friends and loved ones, remembering always, that each and every person is a unique production of Nature,  and  that every one of you needs to respect and nourish your body according to its unique and individual  needs.

Dr. James D’Adamo burst onto the world of natural medicine in the 1970s with his revolutionary discovery of, and approach to, healing based on a person's blood type.
Foreword by Louise L. Hay

Written in the infancy of America's modern natural-healing movement, his first book, One Man's Food . . . is someone else's poison, detailed his unique, individual treatment method that correlated a person's type of blood with diet, exercise, and spiritual practice.

Just An Ounce of Prevention . . . Is Worth a Pound of Cure comes almost 30 years later, as people around the world have increasingly awakened to the efficacy of natural remedies . . . and at a time when the American health-care system is increasingly failing the public.

In this fascinating book, Dr. D'Adamo exhorts us to take responsibility for our own health and prevent chronic degenerative diseases using his newest discoveries, which has given him the opportunity to treat more than 50,000 patients. He explains which foods and exercises are right for each of us, what assets and liabilities we’re born with, and how our minds can work to better process information. This book contains Dr. D'Adamo's most up-to-date and comprehensive teachings; and includes recipes, exercise regimens, and a panoply of natural therapies he recommends to the patients at his institute.

Just An Ounce of Prevention is the consummate statement on natural healing from this generation’s most original naturopath. As Dr. D'Adamo writes: “We are all here for a purpose, and we can only aspire to our physical and spiritual fulfillment when the body is healthy and the mind clear. Blood types are a Truth of Nature and, if followed, will provide a person with the physical and spiritual health that Nature has intended for them.”