3-NT	3-nitrotyrosine
HNE	4-hydroxy-2-nonenal
8-OHdG	8-hydroxy-2′-deoxyguanosine
ATP	adenosine triphosphate
AOPP	advanced oxidation protein products
ADHD	attention deficit hyperactivity disorder
ADOS-2	Autism Diagnostic Observation Schedule, 2nd edition
ASD	autism spectrum disorder
CAT	catalase
CARS	Childhood Autism Rating Scale
CoQ10	coenzyme Q10
DNA	deoxyribonucleic acid
DSM-5	Diagnostic and Statistical Manual of Mental Disorders, fifth edition
DHA	docosahexaenoic acid
EPA	eicosapentaenoic acid
EC-SOD	extracellular superoxide dismutace
FMT	fecal microbiota transplantation
GABA	gamma-aminobutyric acid
GI	gastrointestinal
GSH	glutathione
GPx	glutathione peroxidase
GFCF	gluten-free and casein-free
AhR	aryl hydrocarbon receptor
H2O2	hydrogen peroxide
OH•	hydroxyl radical
IL-10	interleukin-10
IL-6	interleukin-6
KEAP1	Kelch-like ECH-Associated Protein 1
KD	ketogenic diet
LPS	lipopolysaccharides
MDA	malondialdehyde
MCT	medium-chain triglycerides
mtDNA	mitochondrial DNA
NAC	N-acetylcysteine
NT-3	neurotrophin-3
NADPH	nicotinamide adenine dinucleotide phosphate
NO•	nitric oxide
NOS	nitric oxide synthase
NMDA	N-methyl-D-aspartate
Nrf2	nuclear factor erythroid 2-related factor 2
GSSG	oxidized glutathione
PPARγ	peroxisome proliferator-activated receptor gamma
ONOO−	peroxynitrite
PUFA	polyunsaturated fatty acid
RCT	randomized controlled trial
RNS	reactive nitrogen species
ROS	reactive oxygen species
SCFA	short-chain fatty acid
O2•−	superoxide anion
SOD	superoxide dismutase
SOD1	superoxide dismutase 1
SOD2	superoxide dismutase 2
T4	thyroxine
T3	triiodothyronine
TNF-α	tumor necrosis factor-alpha
UV	ultraviolet radiation
VPA	valproic acid
H2O	water