Most commercial diets will work for the general public. Otherwise they would cease to exist. However, as a medical practitioner Dr. Poon deals with a different type of clientele. All of Dr. Poon's patients have medical conditions that are related to obesity. The diet plan will have to be customize to fit the needs of each individual. For there are many medical conditions that can cause weight gain. Simply going to a weight loss clinic and being given a set of meal plans, or purchasing prepared diet food may not work. It can even endanger the patient's health. more... See more text