Figure 1.
(A) An overview of published research articles in the field of tissue metabolomics from January 2002 until May 2021 (*) based on a PubMed search with the terms “tissue metabolomics.” Only original research articles were reported (excluding comprehensive reviews, book chapters, commentaries, conference abstracts) based on mammalian species (blue). Approximately 30% of these studies were based on human tissue specimens (yellow). Pie chart distributions of various (B) mammalian and (C) human tissue specimens analyzed from these published studies.