TABLE 2.

Search terms

Database	Terms
PubMed	((Vitamin B 12[MeSH] OR B12[tw] OR B 12[tw] OR Vitamin B 12 Deficiency[MeSH] OR cobalamin*[tw] OR transcobalamin*[tw] OR methylmalonic acid*[tw]) AND (cogniti*[tw] OR Mental Processes[MeSH] OR Cognition Disorders[MeSH] OR cognitive development[tw] OR attention[tw] OR memory[tw] OR comprehension[tw] OR problem solving[tw] OR cognitive function*[tw] OR neurocognitive[tw] OR reason*[tw] OR learn*[tw] OR mental status[tw] OR intelligence quotient [tw] OR mental development [tw])) AND (infant[MeSH] OR child[MeSH] ORadolescent[MeSH] OR baby[tw] OR babies[tw] OR newborn*[tw] OR neonat*[tw] OR toddler*[tw] OR child*[tw] OR preschool*[tw] OR pre-school*[tw]OR schoolchild*[tw] OR boy*[tw] OR girl*[tw] OR preteen* [tw] or teen*[tw] OR adolescen*[tw] OR youth*[tw] OR young person*[tw] OR young people[tw] OR Mothers[MeSH] OR maternal[tw] OR mother*[tw] OR Pregnant Women[MeSH] OR Pregnancy[MeSH] OR pregnan*[tw] OR Prenatal Care[MeSH] OR prenatal[tw] OR infant*[tw])
PsycINFO	((TX vitamin B 12) OR (TX B 12) OR (TX B12) OR (TX vitamin B 12 deficiency) OR (TX cobalamin*) OR (TX transcobalamin*) OR (TX methylmalonic acid*)) AND ((DE Cognitive ability) OR (DE Cognitive development) OR (TX Cognitive development) OR (DE attention) OR (DE memory) OR (DE comprehension) OR (DE problem solving) OR (TX cognitive function*) OR (TX neurocognitive) OR (DE reason*) OR (DE learn*) OR (TX mental status) OR (TX intelligence quotient) OR (TX mental development) OR (TX IQ)) AND ((TX infant) OR (TX child) OR (TX adolescent) OR (TX baby) OR (TX babies) OR (TX newborn) OR (DE neonat*) OR(TX toddler*) OR (TX child*) OR (TX preschool*) OR (TX pre-school*) OR (TX schoolchild*) OR (TX boy*) OR (TX girl*) OR (TX preteen*) OR (TX teen*) OR (TX adolescen*) OR (TX youth*) OR (TX young person*) OR (TX young people) OR (DE mothers) OR (TX maternal) OR (TX mother*) OR (TX pregnant women) OR (TX pregnancy) OR (TX pregnan*) OR (DE prenatal care) OR (TX prenatal) OR (TX infant*))