Body Mass Index (BMI) is a way to look at your body weight relative to your height. It is a scientifically-based index that categorizes you as being underweight, normal, overweight or obese, and also lets you know about your risk for developing obesity-associated diseases.
The protein factor is an estimate of the optimum amount of protein that the diet should provide, based on the amount of lean body mass you have.
Resting Metabolic Rate (RMR):
The number of calories you burn at rest during a 24-hour period.