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The Curious Bag
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You can lose between three and five pounds per week while on a complete liquid fast. While some dieters fast for a short time to lose a few pounds, others fast for weeks or months. Doctors supervise and closely monitor obese patients recommended for a liquid very low calorie diet (VLCD).
History
Very low calorie diets (VLCD) typically contain 800 to 1,000 calories per day in the form of liquids. Some plans include specially prepared bars as meal replacement in lieu of only liquids.
Time Frame
A liquid diet promotes rapid weight loss within weeks. Some patients lose 40 or more pounds over three months.
Considerations
Patients on liquid diets do not use the diet drinks sold in grocery stores. Instead, doctors prescribe specially formulated products, such as Optifast, that contain adequate nutrients and the right number of calories.
Benefits
Weight loss resulting from a VLCD may lower blood pressure, cholesterol and improve diabetes. The diet should be combined with exercise and behavioral support for long-term success.
Warning
Some side effects of liquid VLCDs include gallstones, fatigue, constipation, nausea or diarrhea. If needed, doctors provide medications to help manage symptoms.
Source:
National Institute Diabetes and Digestive and Kidney Diseases: Very Low Calorie Diets
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