Gut microbes with the gbu genes determine TMAO production from L-carnitine intake and serve as a biomarker for precision nutrition. - Wu WK; Lo YL; Chiu JY; Hsu CL; Lo IH; Panyod S; Liao YC; Chiu THT; Yang YT; Kuo HC; Zou HB; Chen YH; et al. (Gut microbes, 2025)