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Obesity is a primary health concern and a risk factor for coronary heart disease, diabetes, gallbladder disease, arthritis, and peripheral vascular disease. Weight loss can make a significant contribution to improving general health and well-being. The Protein-Sparing Modified Fast (PSMF) is designed for rapid weight loss and incorporates medical, nutritional, and behavioral components. The goal of this diet is to reach an appropriate body weight as determined by your physician and dietitian.
Carbohydrate, protein, and fat are the nutrients in food that provide energy for proper functioning, maintenance, and repair of the body. In addition to these three nutrients, the human body requires water, vitamins, and minerals for good health.
While on the PSMF program, only lean meat, seafood, poultry, and a limited amount of low-carbohydrate vegetables should be eaten. Carbohydrates and additional forms of fat are not allowed on this program. The high protein intake is to prevent the body from using its own protein stores in muscles, tissues, and cells for energy. Thus the program is a modified fast.
Carbohydrates are usually the body's primary source of energy. Since a very limited amount of carbohydrates are consumed, fat becomes the primary fuel source for the body. This rapid breakdown of fat produces ketones that spill into the urine, called ketosis. Ketones in the urine are desirable. While in ketosis, most people lose their appetite, which is a benefit of this program. A large amount of the water in your body is stored with carbohydrates. Since carbohydrate intake is severely limited and storage is severely depleted, dehydration is a health concern. To compensate, adequate quantities of fluid, sodium, and prescription potassium are required each day. Eating foods that are not appropriate can stop ketosis, which not only means less weight reduction, but it can cause dangerous shifts in the body's fluid and electrolytes.
You will be asked to change your eating habits. Throughout the program, new behaviors will be introduced to encourage healthy habits. Your serious effort is required to change old eating habits, which will help you reach and maintain your desired weight. Your physician or dietitian may recommend an appointment with a psychologist to assist with behavior modification.
|Physician Schedule||Dietitian Schedule|
|Initial appointment and assessment||Visit 1: Initial evaluation and instruction|
|Follow-up appointments:||Visit 2: 2 weeks later|
|Approximately every 2 months||Visit 3: 2-3 weeks later|
|Appointments every month for the rest of the program|
When your goal weight is achieved, protein and dietary supplement intake will gradually be reduced while carbohydrates are reintroduced. This refeeding phase is essential for long-term success. Principles of a well-balanced diet are implemented to design a long-term weight control program. You will see the dietitian every two weeks during the beginning of refeeding.
An exercise program will tone muscles and assist with weight reduction and total body fitness. Be sure to obtain physician approval before starting an exercise program. A daily exercise program is encouraged. Your dietitian can give some tips on how to get started. An exercise physiologist can set up a more individualized program if desired.
As with any diet, success results when an individual is willing to make lifestyle changes. Patients who have completed the PSMF have been successful with weight loss. They've successfully maintained weight loss with the refeeding process and implementation of behavior changes.
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