After further adjustment for BMI, treatment arm, CVD, eGFR and serum albumin levels (Model 2) participants with plasma 25(OH)D levels < 20 ng/ml had over a 2-fold increased risk of MetS compared to those with levels > 30 ng/ml (OR 2.11, 95% CI 1.23-3.63). Here, ALB is linked to metabolic syndrome.