Supplementary Figure 3: Associations of fecal metabolites with caffeine metabolism.
From: The fecal metabolome as a functional readout of the gut microbiome
(a) Caffeine metabolism pathway showing the generation of the two metabolites that form the fecal metabolite ratio associated with NAT2 genetic variants. (b) Box plot showing the relationship between circulating caffeine (bottom versus top tertile) and the metabolite ratio 1,3-dimethylurate/5-acetylamino-6-amino-3-methyluracil (n = 444). (c) Box plot showing the relationship between coffee intake (from food frequency questionnaires) and 1,3-dimethylurate/5-acetylamino-6-amino-3-methyluracil (n = 676). P-values were calculated from linear mixed models.
