Effect of Vitamin D Levels on Bone Remodeling in Healthy Women
Vitamin D deficiency is prevalent among Indian women. Subclinical vitamin D deficiency is a significant risk factor for osteopenia and fractures. However, its effect on bone metabolism and bone mineral density (BMD) is still debatable.
This study aimed to determine the relationship between the vitamin D status with bone turnover markers, carboxy-terminal telopeptide of type-I collagen (CTX), N-terminal propeptide of type I procollagen (PINP), and BMD in healthy Indian women.
In this cross-sectional study, we determined serum levels of 25-hydroxy vitamin D (25(OH)D), parathyroid hormone, serum CTX, and PINP using commercial ELISA kits in 310 healthy Indian women aged 25 - 65 years who underwent BMD measurements with DXA scan.
The prevalence of vitamin D deficiency was 53.87% and vitamin D insufficiency 31.29%. A direct correlation of BMD with vitamin D levels was not observed. PINP negatively correlated with vitamin D in both premenopausal (Spearman’s r = -0.169, P < 0.05) and postmenopausal (Spearman’s r = -0.241, P < 0.05) women. However, CTX positively correlated with vitamin D in both premenopausal (Spearman’s r = 0.228, P < 0.01) and postmenopausal (Spearman’s r = 0.244, P < 0.05) women.
Vitamin D deficiency is more prevalent in premenopausal women than in postmenopausal ones. Although vitamin D does not show any association with BMD, it affects bone remodeling, which is reflected by the change in the bone formation marker PINP and the bone resorption marker CTX.
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