The theory behind the coffee diet is that coffee contains caffeine and caffeine can increase your metabolic rate by up to 10%. Increasing your metabolic rate lets you eat more calories and stay the same weight, or if you eat fewer calories than your body needs then you will lose weight.
However, there is a catch. As soon as you start to add milk, creamer, sugar etc your coffee diet goes right out of the window as any calories you may burn as a result of the caffeine effect on your metabolism can easily be used up by the additions.
Many people say they have a slow metabolism but do not realize that the dieting habits they believe help them may actually be causing a slow metabolic rate problem and result in slower weight loss.
When considering starting a diet many people are tempted to ‘crash diet’, cutting down on everything they consider to be bad to the absolute basics, seriously restricting calorie intake.