When models were further adjusted for PTH, 25(OH)D levels of 20–<30 and <20 ng/ml remained significantly associated with increased odds of prevalent MetS compared to 25(OH)D ≥30 ng/ml in whites (OR (95% CI), 1.59 (1.24, 2.04) and 1.48 (1.07, 2.05), respectively). Here, PTH is linked to metabolic syndrome.