Higher plasma serine levels are associated with favorable values of metabolic health markers among middle-aged and older adults in The Maastricht Study - Thomas Olsen; Amany Elshorbagy; Elena C. Tore; Nasser E. Bastani; Emma Stolt; Gabriëlla A. M. Blokland; Coen D. A. Stehouwer; M. Eline Kooi; Jacobus F. A. Jansen; Simone J. P. M. Eussen; Pol Grootswagers; Helga Refsum; et al. (GeroScience, 2026)