AC	Adenylyl cyclase
AMPK	5′adenosine monophosphate-activated protein kinase
AR	Adrenergic receptors
ATGL	Adipose triglyceride lipase
ATP	Adenosine triphosphate
BAT	Brown adipose tissue
cAMP	Cyclic adenosine monophosphate
CIDEA	Cell death–inducing DFFA-like effector A
CREB	cAMP-responsive element-binding protein
DNP	2,4-dinitrophenol
EE	Energy expenditure
FDA	U.S. Food and Drug Administration
FFA	Free fatty acid
GCPR	G protein-coupled receptors
GIP	Glucose-dependent insulinotropic polypeptide
GIPR	GIP receptor
GLP–1 RA	GLP-1 receptor agonist
GLP-1	Glucagon-like peptide-1
GLP-1R	GLP-1 receptor
Gs	Stimulatory G protein
HSL	Hormone-sensitive lipase
MGL	Monoacylglycerol lipase
PGC	1α-Peroxisome proliferator-activated receptor gamma coactivator 1-alpha
PKA	Protein kinase A
RMR	Resting metabolic rate
SNS	Sympathetic nervous system
TAG	Triacylglycerol
TH	Thyroid hormone
THR	Thyroid hormone receptor
TMEM26	Transmembrane protein 26
UCP1	Uncoupling protein 1
WAT	White adipose tissue
WHO	World Health Organization
β3-AR	Beta-3 adrenergic receptors
18F-FDG	18F-fluorodeoxyglucose
18F-FDG PET/CT	18F-fluorodeoxyglucose positron emission tomography/computerized tomography