Metabolomics is the large-scale study of small molecules , commonly known as metabolites, within cells, biofluids, tissues or organisms. Collectively, these small molecules and their interactions within a biological system are known as the metabolome. Metabolomics is widely used to investigate numerous aspects of nutrition using a variety of samples ranging from plants and foods to human and animal tissues and biofluids. Plant metabolomics is increasingly realized as an important tool for investigations of systems biology. metabolomics provides a direct "functional readout of the physiological state" of an organism.Current metabolomic technologies go well beyond the scope of standard clinical chemistry techniques and are capable of precise analyses of hundreds to thousands of metabolites.