protein and dairy for fat loss (new Stu study)

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Interesting new study

J Nutr. <http://www.ncbi.nlm.nih.gov/pubmed/21775530> 2011

Sep;141(9):1626-34. Epub 2011 Jul 20.

Increased consumption of dairy foods and protein during diet- and

exercise-induced weight loss promotes fat mass loss and lean mass gain

in overweight and obese premenopausal women.

Josse AR

<http://www.ncbi.nlm.nih.gov/pubmed?term=%22Josse%20AR%22%5BAuthor%5D> ,

Atkinson SA

<http://www.ncbi.nlm.nih.gov/pubmed?term=%22Atkinson%20SA%22%5BAuthor%5D

> , Tarnopolsky MA

<http://www.ncbi.nlm.nih.gov/pubmed?term=%22Tarnopolsky%20MA%22%5BAuthor

%5D> , SM

<http://www.ncbi.nlm.nih.gov/pubmed?term=%22%20SM%22%5BAuthor%5D

> .

Source

Exercise Metabolism Research Group, Department of Kinesiology, McMaster

University, Hamilton, ON, Canada.

Abstract

Weight loss can have substantial health benefits for overweight or obese

persons; however, the ratio of fat:lean tissue loss may be more

important. We aimed to determine how daily exercise (resistance and/or

aerobic) and a hypoenergetic diet varying in protein and calcium content

from dairy foods would affect the composition of weight lost in

otherwise healthy, premenopausal, overweight, and obese women. Ninety

participants were randomized to 3 groups (n = 30/group): high protein,

high dairy (HPHD), adequate protein, medium dairy (APMD), and adequate

protein, low dairy (APLD) differing in the quantity of total dietary

protein and dairy food-source protein consumed: 30 and 15%, 15 and 7.5%,

or 15 and <2% of energy, respectively. Body composition was measured by

DXA at 0, 8, and 16 wk and MRI (n = 39) to assess visceral adipose

tissue (VAT) volume at 0 and 16 wk. All groups lost body weight (P <

0.05) and fat (P < 0.01); however, fat loss during wk 8-16 was greater

in the HPHD group than in the APMD and APLD groups (P < 0.05). The HPHD

group gained lean tissue with a greater increase during 8-16 wk than the

APMD group, which maintained lean mass and the APLD group, which lost

lean mass (P < 0.05). The HPHD group also lost more VAT as assessed by

MRI (P < 0.05) and trunk fat as assessed by DXA (P < 0.005) than the

APLD group. The reduction in VAT in all groups was correlated with

intakes of calcium (r = 0.40; P < 0.05) and protein (r = 0.32; P <

0.05). Therefore, diet- and exercise-induced weight loss with higher

protein and increased dairy product intakes promotes more favorable body

composition changes in women characterized by greater total and visceral

fat loss and lean mass gain.

S. Kalman PhD, RD, FACN

Director, BD - Nutrition & Applied Clinical Trials

Miami Research Associates

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