The antioxidant enzyme GPX1 gene polymorphisms are associated with low BMD and increased bone turnover markers.

The significant or borderline significant associations were found between the polyAla or the Pro198Leu polymorphisms and total hip BMD (0.018; 0.023, respectively), femoral neck BMD (0.117; 0.026, respectively) and lumbar spine BMD (0.032; 0.086, respectively), and with biochemical bone turnover markers such as plasma osteocalcin (0.027; 0.025, respectively) and serum C-terminal telopeptide of type I collagen concentrations (0.114; 0.012, respectively) in whole group.

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