AD	Alzheimer’s Disease
AI	Adequate Intake
BFCN	Basal Forebrain Cholinergic Neuron
CHRNA7	Cholinergic Receptor Nicotinic Alpha 7 Subunit
DMG	Dimethylglycine
DNA	Deoxyribonucleic acid
DS	Down Syndrome
EFSA	European Food Safety Authority
FAS	Fetal Alcohol Syndrome
ID	Iron Deficiency
MCS	Maternal Choline Supplementation
MTHFD	Methylenetetrahydrofolate Dehydrogenase
NHANES	National Health and Nutrition Examination Survey
NPTDCHOs	Neural Progenitor Cells
NTDs	Neural Tube Defects
PEMT	Phosphatidylethanolamine N-Methyltransferase.
PtdCho	Phosphatidylcholine
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
RCTs	Randomized Controlled Trials.
SNP	Single nucleotide polymorphisms