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Inverse relation between dietary fiber intake and visceral adiposity in overweight Latino youth^1,2,3

¹ From the Departments of Preventive Medicine (JND KEA EEV CMT-CMIG)PhysiologyBiophysics (MIG) Keck School of Medicine University of Southern California Los Angeles CA.

² Supported by grant RO1 DK 59211 from the NIH and grant MO1 RR 00043 from the General Clinical Research Center, National Center for Research Resources.

³ Address correspondence to J Davis, 2250 Alcazar Street, Los Angeles, CA 90089-9008. E-mail: jaimieda{at}usc.edu.

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 · 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.

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Sugar and fiber intake and type of adiposity: are they related?

Joanne R Lupton
AJCN 2009 90: 1119-1120. [Full Text]  

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				J. R Lupton Sugar and fiber intake and type of adiposity: are they related? Am. J. Clinical Nutrition, November 1, 2009; 90(5): 1119 - 1120. [Full Text] [PDF]