Vitamin D status of LDLR^−/− mice in response dietary vitamin D levels.

Plasma concentrations of 25(OH)D₃, 24,25(OH)₂D₃, 1,25(OH)₂D₃, and relative mRNA abundancy of aortic calbindin D_{9 k} of LDLR^−/− mice fed a Western diet with low (50 IU/kg), recommended (1,000 IU/kg), or high (10,000 IU/kg) levels of vitamin D₃ for 16 weeks. Data are means ± SD of 4 probes per group (pools of 3 samples) for analysis of 1,25(OH)₂D₃ and 12 mice per group for all other analyses. ^a,b,c Bars with different superscript letters differ, P<0.05.