Dr Jason Fung grew up in Toronto, Canada and completed both medical school and an internal medicine residency at the University of Toronto. He headed to the University of California, Los Angeles completing his fellowship in nephrology (kidney disease specialist).

He now has both a hospital and office based practice in Toronto, and is the current chief of the Department of Medicine at The Scarborough Hospital, General Division. Struggling daily against the worsening epidemic of type 2 diabetes and obesity, it became clear that current recommended treatment of 'Eat Less, Move More' was simply not successful.

It soon became clear that the medical obsession with calories was not the proper model to treat obesity. He established the Intensive Dietary Management Program to provide patients with a unique treatment focus on diet rather than medications.

The program treats conditions related to the metabolic syndrome, including obesity, type 2 diabetes, obstructive sleep apnea and fatty liver with great success. It now provides guidance both locally and to international patients from as far as New Zealand to the United Kingdom to South Africa. Dr Fung lives in Toronto with his wife and two boys.

Nina Teicholz wrote on food and nutrition science for Gourmet and Men’s Health magazines. She was a reporter for National Public Radio for five years, covering Washington, DC, and Latin America.

She also contributed, on a variety of topics, to The New Yorker, The Economist, The Washington Post, The New York Times, and Salon, among other publications. In addition, she served as the associate director for the Center for Globalization and Sustainable Development at Columbia University.

Teicholz was a student of biology at Yale and Stanford universities and earned a graduate degree from Oxford University. She lives in New York City with her husband and their sons.