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Am J Clin Nutr. 2009 Nov;90(5):1160-6. doi: 10.3945/ajcn.2009.28133. Epub 2009 Sep 30.

Inverse relation between dietary fiber intake and visceral adiposity in overweight Latino youth.

Author information

1
Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA. jaimieda@usc.edu

Abstract

BACKGROUND:

To date, no studies have assessed the longitudinal changes of dietary intake on metabolic risk factors in Latino youth.

OBJECTIVE:

We assessed the relation between changes in dietary intake, specifically sugar and fiber intakes, with changes in adiposity and risk factors for type 2 diabetes in a longitudinal analysis of overweight Latino youth.

DESIGN:

Overweight Latino youth (n = 85; aged 11-17 y) underwent the following measures over 2 y [mean (+/-SD) time difference was 1.5 +/- 0.5 y]: dietary intake by 2-d diet recalls, body composition by dual-energy X-ray absorptiometry and magnetic resonance imaging, and glucose and insulin indexes by oral- and intravenous-glucose-tolerance tests. Partial correlations and repeated-measures analysis of covariance assessed the relation between changes in dietary intake with changes in adiposity and glucose and insulin indexes, independent of the following a priori covariates: sex, Tanner stage, time between visits, and baseline dietary and metabolic variables of interest.

RESULTS:

Increases in total dietary fiber (g/1000 kcal) and insoluble fiber (g/1000 kcal) were associated with decreases in visceral adipose tissue (VAT) (r = -0.29, P = 0.02, and r = -0.27, P = 0.03, for total dietary and insoluble fiber, respectively), independent of baseline covariates and change in subcutaneous abdominal adipose tissue. Participants who had decreased total dietary fiber (mean decrease of 3 g . 1000 kcal(-1) x d(-1)) had significant increases in VAT compared with participants who had increased total dietary fiber (21% compared with -4%; P = 0.02). No other changes in dietary variables were related to changes in adiposity or metabolic variables.

CONCLUSION:

Small reductions in dietary fiber intake over 1-2 y can have profound effects on increasing visceral adiposity in a high-risk Latino youth population.

PMID:
19793854
PMCID:
PMC2762155
DOI:
10.3945/ajcn.2009.28133
[Indexed for MEDLINE]
Free PMC Article
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