ALP	alkaline phosphatase
ALT	alanine aminotransferase
AST	aspartate aminotransferase
ATP	adenosine triphosphate
BMI	body mass index
CRP	C-reactive protein
DBP	diastolic blood pressure
DPP-4	dipeptidyl peptidase-4
EC	enterochromaffin cells
ELISA	enzyme-linked immunosorbent assay
GAPDH	glyceraldehyde-3-phosphate dehydrogenase
GGT	gamma-glutamyltransferase
GI	gastrointestinal
GLP-1	glucagon-like peptide-1
HbA1c	glycosylated hemoglobin
HCT	hematocrit
HDL-C	high-density lipoprotein cholesterol
HepG2	human hepatocellular carcinoma
HFD	high-fat diet
HGB	hemoglobin
HOMA2-IR	homeostasis model assessment of insulin resistance
HPLC	high-performance liquid chromatography
HSCs	hepatic stellate cells
5-HT	5-hydroxytryptamin (serotonin)
HTR2A	serotonin receptor 2A
HTR2B	serotonin receptor 2B
HTR3	serotonin receptor 3
HTR4	serotonin receptor 4
HTRx	serotonin receptor subtypes
IBS	irritable bowel syndrome
IL	interleukin
IR	insulin resistance
LDL-C	low-density lipoprotein-cholesterol
MO	morbid obesity
NAFLD	non-alcoholic fatty liver disease
NASH	non-alcoholic steatohepatitis
NL	normal liver
NW	normal weight
PGC1α/PPARy	peroxisome proliferator- activated receptor gamma coactivator 1-alpha
PLT	platelets
RBC	red blood cells
ROS	reactive oxygen species
RT-qPCR	real-time quantitative polymerase chain reaction
SBP	systolic blood pressure
SERT	serotonin transporter
SS	simple steatosis
T2DM	type 2 diabetes mellitus
TG	triglycerides
TNF-α	tumor necrosis factor alpha
TPH1	tryptophan hydroxylase 1
VLCD	very low calorie diet
WBC	white blood cells
WC	waist circumference