 The metabolome represents the complete set of metabolites in a biological cell, tissue, organ or organism, which are the end products of cellular processes.mRNA gene expression data and proteomic analyses reveal the set of gene products being produced in the cell, data that represents one aspect of cellular function.Conversely, metabolic profiling can give an instantaneous snapshot of the physiology of that cell, and thus, metabolomics provides a direct "functional readout of the physiological state" of an organism.