Hypothesis: low vitamin D status is associated with increased insulin resistance and increased blood pressure. Approach: Multiple regression analysis of information extracted from a large database accumulated by a Canadian health foundation, specifically evaluating statistical associations between serum 25(OH)D levels and insulin responsiveness measures as well as blood pressure, after adjusting these variables for BMI, age, sex, and waist circumference.
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Inclusion Criteria: * Age \> 18 Exclusion Criteria: * Diabetes * Elevated HOMA-IR (\>16)