Use of portion-controlled entrees enhances weight loss in women.
OBJECTIVE
To determine the efficacy of a weight-loss diet using packaged portion-controlled entrees compared with a self-selected diet based on the U.S. Department of Agriculture Food Guide Pyramid (FGP) (United States Department of Agriculture, Center for Nutrition Policy and Promotion, Washington, DC; 1996).


METHODS
Sixty healthy women (BMI 26 to 40 kg/m(2); 24 to 60 years old) were randomized into two intervention groups for an 8-week parallel arm study. The portion-controlled group consumed two frozen entrees daily, plus additional food servings from the FGP. The self-selected diet group consumed a recommended number of servings from the FGP. Diets were designed to be the same in composition (55% carbohydrate, 25% protein, 20% fat) and energy level (1365 kcal). Each group met weekly to monitor compliance and take measures. Outcomes included weight, body composition by DXA, hip and waist circumference, blood pressure, fasting blood lipids, glucose, insulin, and C-reactive protein. Significant differences were assessed using repeated measures ANOVA.


RESULTS
The portion-controlled group (n = 26) experienced greater decreases in weight (5.6 +/- 2.2 kg or 6.5% vs. 3.6 +/- 2.5 kg or 4.2%), fat mass (3.6 +/- 1.8 vs. 2.3 +/- 1.4 kg), total cholesterol (24.4 +/- 21.5 mg/dL or 12.4% vs. 13.0 +/- 13.9 mg/dL or 6.7%), and fasting insulin (-1.8 +/- 3.7 vs.+0.3 +/- 3.8 micro U/mL) than the self-selected diet group (n = 27) (p < 0.05).


CONCLUSIONS
Consumption of portion-controlled entrees resulted in greater losses of weight and fat, thereby reducing cardiovascular disease risk. Accurate portion control is an important factor in weight loss success, and use of packaged entrees is an effective method of achieving this.
Hannum
Sandra M
SM
Food Science and Human Nutrition (FSHN)/ Nutritional Sciences Division, University of Illinois, Urbana, Illinois 61801, USA. hannum1@uic.edu
Carson
LeaAnn
L
Evans
Ellen M
EM
Canene
Kirstie A
KA
Petr
E Lauren
EL
Bui
Linh
L
Erdman
John W
JW
D015502:Absorptiometry, Photon; D000328:Adult; D001786:Blood Glucose / Q000032:analysis; D001823:Body Composition; D015992:Body Mass Index; D004038:Diet, Reducing; D002149:Energy Intake; D005260:Female; D005628:Frozen Foods; D006801:Humans; D007328:Insulin / Q000097:blood; D008055:Lipids / Q000097:blood; D008875:Middle Aged; D018673:Nutrition Policy; D010349:Patient Compliance; D011795:Surveys and Questionnaires; D015431:Weight Loss
D001786:Blood Glucose; D007328:Insulin; D008055:Lipids