Alan C. Logan ND graduated magna cum laude from the State University of New York at Purchase, and was valedictorian at the Canadian College of Naturopathic Medicine in Toronto. He taught Mind-Body Medicine courses in Harvard's School of Continuing Medical Education, and his research and commentaries have appeared in over two dozen medical journals.

He is a trusted source for many popular magazines including Cosmopolitan, Elle, W, Health, and Life & Style, and he is a commentator on US and Canadian television. Logan is the co-author of several books including Your Brain on Nature and The Clear Skin Diet, and is a contributor to the forthcoming Oxford Textbook of Nature and Public Health. He is married to Susan Prescott and splits his time between Perth, Australia and New York.

Susan L. Prescott PhD, MD is an internationally acclaimed immunologist and pediatrician whose early work led to a paradigm shift in understanding the importance of the early environment in immune programming for the risk of subsequent disease.

She is a former Director of the World Allergy Organisation and and former Head of the School of Paediatrics and Child Health at the University of Western Australia.

Prescott is the author of more than 250 scientific papers and several books including The Allergy Epidemic, The Calling, and Origins. She is married to Alan Logan and splits her time between Perth, Australia and New York.