Liquid diets typically shed 3 to 4lbs. per week. This type of diet requires severely cutting down on daily calorie intake, so it is important to maintain proper nutrition. It is important to speak with a health professional before embarking on a liquid diet, Vanderbilt University warns.
A liquid diet replaces solid meals with shakes that contain high levels of protein. The diet generally limits calories to 400 to 800 per day, which assists in the rapid loss of body fat, according to the psychology department at Vanderbilt University. It is important to include proper levels of other nutrients like minerals and salts in the shakes while on the diet and to establish an exercise program for the duration of the diet. Lastly, long-term liquid diets should be monitored by a health professional, and a support group should be established for motivation and understanding of the physical and behavioral changes that the diet elicits.