AAS	Atomic Absorption Spectrometry
AI	Artificial Intelligence
Al	Aluminum
ATP	Adenosine Triphosphate
Sb	Antimony
As	Arsenic
Cd	Cadmium
Co	Cobalt
Cr	Chromium
Cu	Copper
CV-AAS	Cold Vapor Atomic Absorption Spectrometry
DNA	Deoxyribonucleic Acid
EMT	Epithelial–Mesenchymal Transition
Fe	Iron
GFAAS	Graphite Furnace Atomic Absorption Spectrometry
Hg	Mercury
HPLC–ICP-MS	High-Performance Liquid Chromatography coupled with Inductively Coupled Plasma Mass Spectrometry
ICP-MS	Inductively Coupled Plasma Mass Spectrometry
ICP–OES	Inductively Coupled Plasma Optical Emission Spectrometry
IL	Interleukin
IARC	International Agency for Research on Cancer
IoMT	Internet-of-Medical-Things
MDA	Malondialdehyde
miRNA	MicroRNA
ML	Machine learning
Mn	Manganese
mtDNA	Mitochondrial DNA
NF-κB	Nuclear Factor kappa-light-chain-enhancer of activated B cells
Ni	Nickel
NIST	National Institute of Standards and Technology
Nrf2	Nuclear factor erythroid 2–related factor 2
OSCC	Oral Squamous Cell Carcinoma
Pb	Lead
POC	point-of-care
ppb	Parts per Billion
ROS	Reactive Oxygen Species
SERS	surface-enhanced Raman spectroscopy
sIgA	Secretory Immunoglobulin A
STAT3	Signal Transducer and Activator of Transcription 3
Ti	Titanium
TLR	Toll-Like Receptor
TNF-α	Tumor Necrosis Factor Alpha
Zn	Zinc
8-OHdG	8-hydroxy-2′-deoxyguanosine