Table 5.

Metabolites assessed two times or more across different publications on fecal biomarkers.

First Author, Year	Amino Acids				CH	Fatty Acids
	Glutamate Glutamic acid	Glutamine	Isoleucine	Valine	β-Glucose	Acetate	Butyrate Butyric acid	Propionate
Lin, 2016 [58]	↓	↓	↑	↓	↓	↓	↑	↑
Amiot, 2015 [59]	↓	↓			↓	↑	↓	↑
Phua, 2014 [15]
Bezabeh, 2009 [60]	→		→	→			→

Abbreviations: ↑, increased levels in cases compared to healthy individuals; ↓, decreased levels in cases compared to healthy individuals; →, significant differences between cases and healthy individuals (not reported if increased or decreased); CH, carbohydrates. Empty lines indicate that this specific metabolite was not investigated in the corresponding study.