Hormonal
Higher intake of cereal fiber and whole grains is inversely associated with insulin resistance (HOMA-IR) and the prevalence of metabolic syndrome, whereas higher dietary glycemic index is positively associated with both.
To lower your risk of metabolic syndrome, prioritize foods high in cereal fiber and whole grains (like oats, barley, and whole wheat) while minimizing foods with a high glycemic index (like white bread and sugary snacks). Do not fear total carbohydrates; focus on their quality and fiber content instead.
After adjustment for potential confounding variables, intakes of total dietary fiber, cereal fiber, fruit fiber, and whole grains were inversely associated, whereas glycemic index and glycemic load were positively associated with HOMA-IR. The prevalence of the metabolic syndrome was significantly lower among those in the highest quintile of cereal fiber (odds ratio [OR] 0.62; 95% CI 0.45– 0.86) and whole-grain (0.67; 0.48 – 0.91) intakes relative to those in the lowest quintile category... Conversely, the prevalence of the metabolic syndrome was significantly higher among individuals in the highest relative to the lowest quintile category of glycemic index (1.41; 1.04 –1.91).
Why this rating
Large observational cohort (n=2,834) with rigorous adjustment for confounders, but cross-sectional design limits causal inference.
Source
Carbohydrate Nutrition, Insulin Resistance, and the Prevalence of the Metabolic Syndrome in the Framingham Offspring Cohort
Nicola M. McKeown et al. · Diabetes Care · 2004
DOI 10.2337/diacare.27.2.538
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