Objective: To examine if reductions in added sugar intake or increases in fiber intake in response to a 16-week intervention were related to improvements in metabolic outcomes related to type 2 diabetes mellitus risk.
Design: Secondary analysis of a randomized control trial.
Setting: Intervention classes at a lifestyle laboratory and metabolic measures at the General Clinical Research Center.
Participants: Fifty-four overweight Latino adolescents (mean [SD] age, 15.5 [1] years). Intervention Sixteen-week study with 3 groups: control, nutrition, or nutrition plus strength training.
Main Outcome Measures: Body composition by dual-energy x-ray absorptiometry; visceral adipose tissue by magnetic resonance imaging; glucose and insulin incremental area under the curve by oral glucose tolerance test; insulin sensitivity, acute insulin response, and disposition index by intravenous glucose tolerance test; and dietary intake by 3-day records.
Results: Fifty-five percent of all participants decreased added sugar intake (mean decrease, 47 g/d) and 59% increased fiber intake (mean increase, 5 g/d), and percentages were similar in all intervention groups, including controls. Those who decreased added sugar intake had an improvement in glucose incremental area under the curve (-15% vs +3%; P = .049) and insulin incremental area under the curve (-33% vs -9%; P = .02). Those who increased fiber intake had an improvement in body mass index (-2% vs +2%; P = .01) and visceral adipose tissue (-10% vs no change; P = .03).
Conclusions: Individuals who reduced added sugar intake by the equivalent of 1 can of soda per day or increased fiber intake by the equivalent of a cup of beans showed improvements in key risk factors for type 2 diabetes, specifically in insulin secretion and visceral fat. Improvements occurred independent of group assignment and were equally likely to occur in control group participants.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2850811 | PMC |
| http://dx.doi.org/10.1001/archpediatrics.2009.11 | DOI Listing |
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