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THE EFFECT OF CONSUMPTION OF FAT‐FREE DAIRY PRODUCTS OVER EIGHT WEEKS ON BODY WEIGHT, WAIST CIRCUMFERENCE AND SATIETY HORMONES IN OVERWEIGHT AND OBESE INDIVIDUALS
Author(s) -
El Khoury Dalia,
Huot Pedro,
Barkhordari Nazanin,
Smith Chris,
Wad Mukta,
Goff H Douglas,
Anderson G Harvey
Publication year - 2015
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.29.1_supplement.734.8
Subject(s) - waist , overweight , leptin , medicine , endocrinology , obesity , circumference , zoology , area under the curve , insulin , biology , geometry , mathematics
Increasing dairy consumption may be an alternative to weight loss diets. Therefore, we compared the effects of adding 4 servings per day of fat‐free and low‐fat dairy products to an energy restricted (ER, 500 kcal) diet over 8 weeks on body weight, waist circumference and satiety hormones in overweight/obese individuals. 36 overweight/obese men and women (age: 46±1.19 years; BMI: 30.4±0.46 kg/m 2 ) completed the study. By week 8, all participants reduced weight (‐1.13±0.38 kg; P<0.01) and waist circumference (‐0.70±0.19 cm; P=0.001). Consumption of dairy reduced fasting levels of HbA1c compared with the ER group at week 4 (P=0.006) and week 8 (P=0.065). Furthermore, in women, dairy (32.1±2.8 ng/ml; n=10) led to higher fasting leptin levels than ER diet (23.1±2.0 ng/ml; n=11) at week 8 (P=0.016). By week 8, mean fasting PYY increased in the dairy group (4.06±5.76 pg/ml; n=12), whereas it decreased in the ER group (‐9.19±3.06 pg/ml; n=10) from baseline (P=0.07). There were no differences in glucose area under the curve (AUC) (P=0.33) between the dairy (226±24 mmol/l; n=16) and the ER group (266±33 mmol/l; n=14), and no differences in insulin AUC (dairy: 3735±693 μIU/ml; n=17; ER: 2212±487 μIU/ml; n=15; P=0.09), at week 8. Ghrelin levels were not affected by diet over the 8 weeks. Adding fat‐free and low‐fat dairy products reduced body weight and waist circumference similar to the ER diet but had mixed effects on metabolic measures. Supported by Natural Sciences and Engineering Research Council of Canada‐Collaborative Research and Development Grant, Dairy Farmers of Ontario and Kraft Canada Inc.