Dear Editor,Metabolomics is a rapidly emerging field of post-genomic research that aims to comprehensively analyze all metabolites in biological samples.Potential biomarkers that distinguish prostate cancer samples were successfully identified through metabolomics analysis (Sreekumar et al.,2009).Metabolome quantitative trait loci (mQTL) and genome-wide association studies coupled with metabolomics analysis (mGWAS) also became efficient tools to decipher the genetic basis of complex metabolic traits in large populations (Gong et al.,2013;Chen et al.,2014).