Fig. 2From: Metabolomics and physiological analysis of the effect of calcium supplements on reducing bone loss in ovariectomized rats by increasing estradiol levelsEffect of CaCO3 on serum E2 levels. Results are presented as the means ± SD. a: p < 0.05 compared with the SHAM-LC group. b: p < 0.05 compared with the OVX-LC groupBack to article page