It really depends on your body type and how much excess weight you have. For example, if someone has 75 pounds to lose, they will lose weight faster than someone who has 5-10 pounds to lose. Genetics also play a big role on how much and how fast someone can lose weight. For most people, 5 pounds of weight loss a week is a little much. It's much safer to comfortably lose 1-2 pounds every week.