Odds are, you have tried to get rid of weight. Consulting your physician and/or a registered dietician nutritionist (RDN) is recommended in cases where you intend to lose over 2 pounds per week. A mean man requires 2500 calories to preserve, and 2000 to shed one pound of weight each week. For sake of simplicity, we are only going to utilize the Harris-Benedict Equation because let's face it -- you