Dr. Poon moved from Hong Kong to the U.S. in 1975. He attended the University of Southern Mississippi and earned his Bachelor of Science Degree with Highest Honors in the Department of Medical Technology in 1978. Clinical Biochemistry was his area of interest. After working briefly at a local clinical laboratory, he decided to pursue further studies in Clinical Biochemistry.

In 1979, he started his graduate study at the Department of Pathology at the Medical College of Wisconsin in Milwaukee. Under the guidance of Professor Doumas, who is an authority in the analysis of serum protein and bilirubin, he received his Doctoral of Philosophy in 1983. During his graduate study, he continued to work in the hospital, as well as research laboratories.

After he immigrated to Canada, he studied medicine at the University of Toronto. He started his family practice career in Richmond Hill, Ontario since graduation in 1987. His interest in weight control began ten years ago. However, his "low-fat and eat less" Canada's Food Guide approach did not have much success. One time about seven years ago, one of his patients asked him for his opinion about a "high-protein diet", he began to study the mechanism of the "low-carbohydrate low-fat high-protein diet" and found that this type of diet did merit a clinical trial.

He found success in helping his patients to lose weight and improve on their health. Since then, there has been more formal research done on low-carbohydrate-high-fat diets. However, there is not much work done on low-carbohydrate low-fat diet yet. Dr. Poon has seen first hand the positive effect of his diet on his obese patients, especially those patient suffering from metabolic syndrome and type 2 diabetes. The most gratifying moment is when he sees the happy faces of his diabetic patients when they go off insulin injections once they lose weight and get their blood sugar under good control. He has been an advocate of the low-carbohydrate low-fat diet ever since.