The Fast Metabolism Diet is a diet plan created by celebrity nutritionist and wellness consultant Haylie Pomroy. The diet is based on the idea that by changing what you eat and when you eat it, you can increase your metabolism and lose weight. The diet is designed to be followed in three phases, each lasting one week. In each phase, you eat specific foods and nutrients at specific times of day to maximize your metabolism and burn fat.

The first phase focuses on high-carbohydrate, low-fat foods to help the body release stored glucose and increase metabolism. The second phase focuses on lean protein, vegetables, and healthy fats to build muscle and burn fat. The third phase includes more healthy fats and complex carbohydrates to help maintain weight loss and stabilize blood sugar levels. The diet also includes recommendations for hydration, exercise, and stress reduction. While some people have reported success with the Fast Metabolism Diet, there is limited scientific evidence to support its effectiveness.