When choosing a weight loss program, several different factors should be considered, such as age, cholesterol level, body mass index (BMI), heart rate, metabolism, hormonal levels, history of disease, and blood pressure. The goal in any good diet program should be to obtain and maintain a healthy weight for your particular body type. It is very important that you consult a physician, licensed nutritionist or fitness trainer before you start any exercise or weight loss program since losing weight too fast can cause even greater health problems in the long run.