βOHB	β- hydroxybutyrate
AD	Alzheimer’s Disease
ADIPOQ	Adiponectin
AgRP	Agouti-Related Peptide
AMPK	5′Adenosine Monophosphate-Activated Protein Kinase
ANS	Autonomic Nervous System
App-KI	Amyloid precursor protein knock-in
ARC	Arcuate Nucleus of the Hypothalamus
AVP	Arginine Vasopressin
BAT	Brown Adipose Tissue
BBB	Blood–Brain Barrier
BD	Bipolar Disorder
BDNF	Brain-Derived Neurotrophic Factor
BMAL1	Brain Muscle Arnt-Like Protein 1
Camk2a	Calcium/Calmodulin-Dependent Protein Kinase II Alpha
CART	Cocaine And Amphetamine-Regulated Transcript
CB1R	Cannabinoid Receptor 1
CCG	Core Clock Genes
CCK	Cholecystokinin
CLOCK	Circadian Locomotor Output Cycles Protein Kaput
CK1δ	Casein Kinase 1 Delta
CK1ϵ	Casein Kinase 1 Epsilon
CNS	Central Nervous System
CORT	Corticotrophin
CREB	Camp Response Element-Binding Protein
CRH	Corticotrophin-Releasing Hormone
CRY	Cryptochrome
CRY1	Cryptochrome 1
CRY2	Cryptochrome 2
CTP1c	Carnitine Palmitoyltransferase 1c
dlPFC	Dorsal Lateral Prefrontal Cortex
DMH	Dorsal Medial Hypothalamus
dpHb	Dorsal Perihabenular Nucleus
eCB	Endocannabinoid
FAA	Food-Anticipatory Activity
FEO	Food-Entrainable Oscillator
FGF21	Fibroblast Growth Factor 21
GABA	Gamma-Aminobutyric Acid
GLP-1	Glucagon-Like Peptide 1
GRP	Gastrin-Releasing Peptide
HFD	High-Fat Diet
HPA	Hypothalamic–Pituitary Axis
ipRGCs	Induced Pluripotent Retinal Ganglion Cells
JNK	C-Jun N-Terminal Kinase
Kiss1	Kisspeptin 1
Lep	Leptin
LH	Lateral Hypothalamus
MCH	Melanin-Concentrating Hormone
MC4R	Melanocortin Receptor 4
MPOA	Medial Preoptic Area
mTOR	Mammalian Target of Rapamycin
mTORc1	Mammalian Target of Rapamycin Complex 1
NAD+	Nicotinamide Adenine Dinucleotide
NAM	Nicotinamide
NAMPT	Nicotinamide Phosphoribosyltransferase
NMN	Nicotinamide Mononucleotide
NOB	Nobiletin
NPAS2	Neuronal PAS Domain Protein 2
NPY	Neuropeptide Y
NR1D1	Nuclear Receptor Subfamily 1 D Member 1
NR1D2	Nuclear Receptor Subfamily 1 D Member 2
NREM	Non-Rapid Eye Movement
NTS	Nucleus Tractus Soilaris
OT	Oxytocin
OX	Orexin
PACAP	Pituitary Adenylate Cyclase-Activating Polypeptide
PB	Parabrachial Nucleus
PDYN	Prodynophin
PER	Period
PER1	Period 1
PER2	Period 2
PNS	Parasympathetic Nervous System
POMC	Proopiomelanocortin
PPARγ	Peroxisome Protein Activator Receptor Gamma
PVN	Paraventricular Nucleus
p75NTR	Neurotrophin Receptor P75
REV-ERBα	Nr1d1
REV-ERBβ	Nr1d2
RF	Restricted Feeding
RHT	Retinohypothalamic Tract
RORs	Retinoic Acid Receptor-Related Orphan Receptors
SAD	Seasonal Affective Disorder
SCN	Suprachiasmatic Nucleus
SF1	Steroidogenic Factor 1
SIM1	Single-Minded Homolog 1
SIRT1	Sirtuin 1
SPVZ	Subparaventricular Zone
TRF	Time-Restricted Feeding
TRH	Thyrotropin-Releasing Hormone
TrkB	Tropomyosin Receptor Kinase B
TRPM2	Transient Receptor Potential Cation Channel, Subfamily M, Member 2
TF	Transcription Factor
TTLF	Transcription–Translation Feedback Loop
VLPO	Ventral Lateral Preoptic Area
VTA	Ventral Tegmental Area