Figure S2.

Variability of different molecules captured by S’Wipe Kit across participants. A. Indole, major stool smell component B. Caffeine, only found in coffee/tea consumers. C. p-cresol, a breakdown product of protein and proposed biomarker of autism in kids (90–95). D. Excessively low ratio of butyrate to propionate (subjects below red bar) is associated with insufficient fiber intake, loss of butyrate producing bacteria, inflammatory conditions (36, 96)(36–38, 97), while excessively high ratio (subjects above blue bar) may be indicative of SIBO (36–38). The expected ratio for a healthy population is 1-2 (36, 38, 43, 96–98).