Heatmap visualization of Pearson correlation of plasma level of raspberry ketone (RK) and its structurally related metabolites, showing concurrent changes in concentration after an acute dose of RK in normal-weight male mice. Compound abbreviations in addition to those in Table 1. 4-HCA, trans-p-Coumaric acid; 4-HPAA, 4-hydroxyphenyl acetic acid; 4-HPPA, 3-(4-hydroxyphenyl)propionic acid; 3-HPPA, 3-(3-hydroxyphenyl)propionic acid; VA, vanillic acid; HVA, homovanillic acid; FA, ferulic acid; DHFA, dihydroferulic acid.