Clinical and rodent studies have demonstrated the impact of specific dietary factors in modulating inflammation-related diseases including insulin resistance, type 2 diabetes, and cardiovascular disease. Such dietary factors include polyunsaturated fats, polyphenols, and glycemic index. The investigators know from previous studies in the literature that reducing the glycemic index and increasing the omega-3 fat and polyphenol content of the diet results in improved metabolic indices and reduced inflammation. These improvements can be observed even within the context of persistent obesity. The investigators will implement a reduced-calorie, multi-pronged dietary approach for improving insulin sensitivity and reducing inflammation in obese subjects with the metabolic syndrome. The active diet will include reduced glycemic index foods together with omega-3 fats and polyphenol supplements. The primary hypothesis is that the dietary combination of reduced glycemic index foods, omega-3 fats and polyphenols will work to reduce insulin resistance and inflammation more efficiently than a placebo-controlled, calorie- and macronutrient-matched diet in obese subjects with the metabolic syndrome.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
SINGLE
Enrollment
41
fish oil capsules
delphinidin polyphenol capsules
Corn Oil Capsules
Maltodextrin capsules
Made by Zone Labs
placebo bread products
University of California, San Diego
San Diego, California, United States
Change in insulin resistance
Fasting plasma insulin, Homeostasis Model of Assessment - Insulin Resistance (HOMA-IR)
Time frame: Baseline, 6 weeks, and 12 weeks
Change in inflammation biomarkers
Fasting plasma cytokines and C-reactive protein (CRP), monocyte expression of inflammatory genes
Time frame: Baseline, 6 weeks, 12 weeks
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