T2DM	Type 2 diabetes mellitus
NICE	The National Institute of Care and Excellence
RYGB	Roux-en-Y gastric bypass
VTA	ventral tegmental area
NA	nucleus acumbens
ARC	arcuate nucleus
AgRP	Agouti-related peptide
POMC	proopiomelanocortin
CART	Cocaine and amphetamine-regulated transcript
MC3/4R	melanocortin 3 and 4 receptors
NTS	nucleus of the solitary tract
LPN	lateral parabrachial nucleus
CCK	cholecystokinin
GLP-1	Glucagon-like peptide-1
PYY	peptide tyrosine tyrosine
PP	Pancreatic polypeptide
PVN	Paraventricular nucleus of hypothalamus
PP	pancreatic polypeptide
NPY	Neuropeptide Y
OXM	Oxyntomodulin
GOAT	Ghrelin O-acyltransferase
RCT	Randomised Controlled Trial
SNPs	single nucleotide polymorphisms
FTO	fat mass and obesity-associated
SCFAs	Short-chain fatty acids
NDC	non-digestible carbohydrates
FFAR2/3	free fatty acids receptors 2 and 3