Improvement of insulin sensitivity by isoenergy high carbohydrate traditional Asian diet: a randomized controlled pilot feasibility study

William C Hsu, Ka Hei Karen Lau, Motonobu Matsumoto, Dalia Moghazy, Hillary Keenan, George L King, William C Hsu, Ka Hei Karen Lau, Motonobu Matsumoto, Dalia Moghazy, Hillary Keenan, George L King

Abstract

The prevalence of diabetes is rising dramatically among Asians, with increased consumption of the typical Western diet as one possible cause. We explored the metabolic responses in East Asian Americans (AA) and Caucasian Americans (CA) when transitioning from a traditional Asian diet (TAD) to a typical Western diet (TWD), which has not been reported before. This 16-week randomized control pilot feasibility study, included 28AA and 22CA who were at risk of developing type 2 diabetes. Eight weeks of TAD were provided to all participants, followed by 8 weeks of isoenergy TWD (intervention) or TAD (control). Anthropometric measures, lipid profile, insulin resistance and inflammatory markers were assessed. While on TAD, both AA and CA improved in insulin AUC (-960.2 µU/mL × h, P = 0.001) and reduced in weight (-1.6 kg; P<0.001), body fat (-1.7%, P<0.001) and trunk fat (-2.2%, P<0.001). Comparing changes from TAD to TWD, AA had a smaller weight gain (-1.8 to 0.3 kg, P<0.001) than CA (-1.4 to 0.9 kg, P = 0.001), but a greater increase in insulin AUC (AA: -1402.4 to 606.2 µU/mL × h, P = 0.015 vs CA: -466.0 to 223.5 µU/mL × h, P = 0.034) and homeostatic static model assessment-insulin resistance (HOMA-IR) (AA: -0.3 to 0.2, P = 0.042 vs CA: -0.1 to 0.0, P = 0.221). Despite efforts to maintain isoenergy state and consumption of similar energy, TAD induced weight loss and improved insulin sensitivity in both groups, while TWD worsened the metabolic profile.

Trial registration: ClinicalTrials.gov NCT00379548.

Conflict of interest statement

Competing Interests: M. Matsumoto is a paid member of Sunstar, Inc., which was one of the funders of this study. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Figures

Figure 1. Flow of participants throughout the…
Figure 1. Flow of participants throughout the study.
aAA, Asian Americans; CA, Caucasian Americans.

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Source: PubMed

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