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Protein intake during energy restriction: effects on body composition and markers of metabolic and cardiovascular health in postmenopausal women.

Abstract：

OBJECTIVE:The primary aim of this study was to assess the effects of dietary protein intake on energy restriction (ER)-induced changes in body mass and body composition. Clinical markers of metabolic and cardiovascular diseases were also measured. DESIGN:54 postmenopausal women, age 58 +/- 2 y, body mass index 29.6 +/- 0.8 kg/m(2), were assigned to one of four groups. For 9 weeks, three ER groups ate a 1000 kcal/d lacto-ovo vegetarian basal diet plus 250 kcal/d of either beef (BEEF, n = 14), chicken (CHICKEN, n = 15), or carbohydrate/fat foods (CARB (lacto-ovo), n = 14), while a control group (CON, n = 11) consumed their habitual diets. RESULTS:Energy intake was lower in the ER groups compared to CON (BEEF, 1114 +/- 155 kcal/d, CHO: PRO: FAT, 46:24:30 % of energy intake; CHICKEN, 1098 +/- 203 kcal/d, 51:25:24; CARB 1158 +/- 341 kcal/d, 59:17:24; CON, 1570 +/- 633 kcal/d, 47:20:33), but did not differ among ER groups. For all ER subjects combined, body mass (-6.7 +/- 2.4 kg, 9 %), fat mass (-4.6 +/- 1.9 kg, 13 %), and fat-free mass (-2.1 +/- 1.1 kg, 5 %) decreased. These responses did not differ among the ER groups, except for body mass (CHICKEN -7.9 +/- 2.6 kg(a); BEEF -6.6 +/- 2.7 kg(a,b); CARB -5.6 +/- 1.8 kg(b); CON -1.2 +/- 1.2 kg(c); values with a difference superscript differ, p < 0.05). From PRE (week 0) to POST (week 9), total and LDL cholesterol decreased approximately 12%, with no differences among groups. Triacylglycerol, HDL cholesterol, C-reactive protein (CRP), glucose, insulin, leptin, and adiponectin were not changed over time or differentially affected by diet. CONCLUSIONS:Overweight postmenopausal women can achieve significant weight loss and comparable short-term improvements in body composition and lipid-lipoprotein profile by consuming either a moderate-protein (25% of energy intake) poultry- or beef-containing diet or a lacto-ovo vegetarian protein (17% of energy intake) diet.

journal_name

J Am Coll Nutr

journal_title

Journal of the American College of Nutrition

authors

Mahon AK,Flynn MG,Stewart LK,McFarlin BK,Iglay HB,Mattes RD,Lyle RM,Considine RV,Campbell WW

doi

10.1080/07315724.2007.10719600

subject

Has Abstract

pub_date

2007-04-01 00:00:00

pages

182-9

issue

eissn

0731-5724

issn

1541-1087

pii

26/2/182

journal_volume

pub_type

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Protein intake during energy restriction: effects on body composition and markers of metabolic and cardiovascular health in postmenopausal women.