A “new” study of chemical processes in living things is being evaluated; it’s called metabolomics. Basically, one studies the end products of cellular processes. It was first proposed after World War II, when paper chromatography was in vogue- and which did not afford enough data for the study to truly advance. Then, gas chromatography/mass spectrometers were developed (1970’s), which let us really begin to study the metabolites, along with the development of NMR spectroscopy.