ACG	American College of Gastroenterology
AGA	American Gastroenterological Association
AMSTAR 2	A MeaSurement Tool to Assess Systematic Reviews 2
APC	Article processing charge
BSG	British Society of Gastroenterology
BSH	Bile salt hydrolase
CCA	corrected covered area
CFU	colony-forming units
CI	confidence interval
CONSORT	Consolidated Standards of Reporting Trials
COVID-19	coronavirus disease 2019
IBS	irritable bowel syndrome
IBS-C	constipation-predominant irritable bowel syndrome
IBS-D	diarrhea-predominant irritable bowel syndrome
IBS-M	mixed-type irritable bowel syndrome
ICHPPC/WONCA	International Classification of Health Problems in Primary Care/World Organization of National Colleges, Academies and Academic Associations of General Practitioners/Family Physicians
IRB	Institutional Review Board
MA	meta-analysis
MD	mean difference
MeSH	Medical Subject Headings
NMA	network meta-analysis
NNT	number needed to treat
OR	odds ratio
OSF	Open Science Framework
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PRIOR	Preferred Reporting Items for Overviews of Reviews
PROSPERO	International Prospective Register of Systematic Reviews
QoL	quality of life
RCT	randomized controlled trial
RR	risk ratio
ROBIS	Risk Of Bias In Systematic reviews
SCFA	short-chain fatty acids
SMD	standardized mean difference
SR	systematic review
TLR	Toll-like receptor
TNF-α	tumor necrosis factor alpha
UR	umbrella review
WGO	World Gastroenterology Organization