About Dr. Gaby

Alan R. Gaby, M.D. Biographical Information

Nutritional Medicine by Dr. Alan R. Gaby is a science-based, extensively referenced textbook written for healthcare practitioners and for non-practitioners who are interested in viable alternatives to conventional medicine. The textbook discusses hundreds of nutritional therapies that can be used as effective, low-cost, low-risk alternatives or adjuncts to conventional medicine.


Dr. Gaby received his undergraduate degree from Yale University, his M.S. in biochemistry from Emory University, and his M.D. from the University of Maryland. He was in private practice for 19 years, specializing in nutritional medicine.

He is past-president of the American Holistic Medical Association, and has given expert testimony to the White House Commission on Complementary and Alternative Medicine on the cost-effectiveness of nutritional supplements. He is the author of Preventing and Reversing Osteoporosis (Prima, 1994) and The Doctor’s Guide to Vitamin B6 (Rodale Press, 1984), and is co-author of The Patient’s Book of Natural Healing (Prima, 1999). Dr. Gaby has written numerous scientific papers in the field of nutritional medicine. He was the contributing medical editor for the Townsend Letter for Doctors from 1985 to 2023, and was contributing editor for Alternative Medicine Review from 1996 to 2010.


Over the past 43 years, Dr. Gaby has developed a computerized database of more than 28,000 individually chosen medical journal articles related to the field of natural medicine. He was professor of nutrition and a member of the clinical faculty at Bastyr University in Kenmore, WA, from 1995 to 2002. In 2010, Dr. Gaby completed a 30-year project: the textbook Nutritional Medicine. The second edition of Nutritional Medicine was completed in 2017 and the updated third edition was completed in 2023. Dr. Gaby has appeared on the CBS Evening News and the Donahue Show.

“I am tremendously grateful for your book. Its clinical pearls have been an invaluable part of my practice. It has been a phenomenal help to me in determining the best therapies for my patients and in getting great results, especially with less common disorders.”

– Eric Muradov, N.D.
TruMed Naturopathic Clinic, Edmonton, Alberta
Nutritional Medicine, Third Edition
The Book
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