Protein Sparing Modified Fast (PSMF) is a specialized and temporary diet approach that is designed to help individuals lose body fat while preserving muscle mass. It involves consuming a very low calorie and low-fat diet, primarily consisting of lean protein sources and minimal carbohydrates and fats. The goal of PSMF is to provide adequate protein to support essential bodily functions while creating a calorie deficit to promote fat loss.
The main principle behind PSMF is to minimize the intake of carbohydrates and fats, which are the body's primary sources of energy, while maintaining a sufficient intake of protein. By keeping protein intake high, the body is less likely to break down muscle tissue for energy. Instead, it primarily utilizes stored body fat for fuel.
Typically, PSMF diets include lean protein sources such as chicken breast, turkey, fish, lean beef, low-fat dairy products, and egg whites. The diet usually restricts or eliminates foods high in carbohydrates and fats, including most fruits, grains, starchy vegetables, and added fats/oils.
Due to the extremely low calorie intake and limited variety of foods, PSMF is considered a short-term approach and should be followed under medical supervision. It is often used in clinical settings for obese individuals before weight loss surgery or for those needing rapid weight loss for medical reasons.
It's important to note that PSMF is not suitable for everyone and should only be attempted under the guidance of a healthcare professional. It can be an effective tool for rapid weight loss but requires careful monitoring and should not be used as a long-term dietary strategy.