Fig. 1.

Yearly number of PubMed records including both keywords on epidemiology/population-based research and metabolomics in the period 2008–2018 (2018 number based on results up to October 6, 2018). Footnote: search performed as (“epidemiology” or “epidemiologic” or “population-based” or “observational” or “case-control” or “cohort” or “cross-sectional”) AND (“metabolome” or “metabonome” or “metabolomic” or “metabolomics” or “metabonomic” or “metabonomics” or “metabolic profile” or “metabolite profile” or “metabolic signature” or “glycomic” or “glycomics” or “lipidomic” or “lipidomics”); date of search: October 6, 2018