Calcium absorption-related gene expression in intestines of rats (A), TRPV5 (B), TRPV6 (C), PepT1 (D), Calbinding-D9k. (E), NCX-1 (F), PMCA1b. Data are expressed as the mean ± SD (n = 8). ns p > 0.05; * p < 0.05; ** p < 0.01; *** p < 0.005; **** p < 0.001.