Fig. 3From: Metabolomics approach to serum biomarker for laxative effects of red Liriope platyphylla in loperamide-induced constipation of SD ratsSpectral analysis of metabolomic pattern using PCA and OPLS-DA. a Global profiling of loperamide treatment in serum samples. Targeted profiling of loperamide treatment in serum samples. b The VIP shows the major metabolites contributing to cluster separation. The data are reported as the mean ± SDBack to article page