medRxiv. 2023 Nov 8:2023.11.07.23298200. doi: 10.1101/2023.11.07.23298200. Preprint. ABSTRACT Metabolomic age models have been proposed for the study of biological aging, however they have not been widely validated. We aimed to assess the performance of newly developed and existing nuclear magnetic resonance spectroscopy (NMR) metabolomic age models for prediction of chronological…