Vitamin D status and glucose homeostasis in the 1958 British birth cohort: the role of obesity.
Hyppönen E, Power C.
Diabetes Care. 2006 Oct;29(10):2244-6.
PMID: 17003300
doi: 10.2337/dc06-0946
CONCLUSIONS-Body size was a strong determinant for 25(OH)D, with concentrations being suboptimal in most obese participants. Randomized controlled trials [using dosages sufficient to improve 25(OH)D also for the obese] are required to determine whether clinically relevant improvements in glucose metabolism can be obtained by vitamin D supplementation.