The effect of vitamin D supplementation on arterial stiffness in an elderly community–based population

Abstract Vitamin D deficiency may lead to impaired vascular function and abnormalities in central arterial stiffness. We compared the effects of two different doses of vitamin D3 on arterial stiffness in an elderly population with deficient serum 25–hydroxy–vitamin D levels. A total of 119 known vitamin D deficient ( P  = .22). A mean decrease of 3.803 ± 1.7 ( P  = .032) in augmentation index (a measure of systemic stiffness) was noted. Only 3/51 (5.8%) who received 100,000 IU vitamin D reached levels of sufficiency (>75 nmol/L). A significant decrease in augmentation index was seen in the group that received 100,000 IU vitamin D. Serum levels of 25–hydroxy–vitamin D were still deficient at 8 weeks in the majority of patients, which may be attributable to impaired bioavailability.