“…Utilizing a metabolomics approach to understand disease mechanisms and dissect the mechanisms of action of TCM has been a key focus of recent TCM research (Hu and Xu ; Liu et al , ). Recent studies have used various techniques, such as high‐performance liquid chromatography–diode array detection (Liu, Yu, Sun, & Di, ), liquid chromatography–mass spectroscopy (Xu et al , ) and gas chromatography–mass spectroscopy (Huang, Lou, Hsu, & Hou, ), to understand the mechanism of hyperuricemia using urine samples and a metabolomic approach. To some extent, urine metabolomics is susceptible to a dilution factor (depending upon the amount of liquid intake; Walsh, Brennan, Malthouse, Roche, & Gibney, ).…”