| 5-fTHF | 5-formyl-tetrahydrofolate |
| 5-mTHF | 5-methyl-tetrahydrofolate |
| CBMN | Cytokinesis block micronuclei assay |
| DHF | Dihydrofolate |
| DHFR | Dihydrofolate reductase |
| FA | Folic acid |
| FAR | Folic acid to total folate intake ratio |
| Hcy | Homocysteine |
| LCL | Lymphoblastoid cell line |
| LINE-1 | Long interspersed nuclear elements |
| MGMT | O-6-methylguanine-DNA methyltransferase |
| MLH1 | mutL homolog 1 |
| MNi | Micronuclei |
| MMA | Methylmalonic acid |
| MTHFR | Methylene tetrahydrofolate reductase |
| MTR | 5-methyltetrahydrofolate-homocysteine methyltransferase |
| NBUD | Nuclear buds |
| NPB | Nucleoplasmic bridges |
| NTD | Neural tube defects |
| RBC | Red blood cells |
| RDA | Recommended daily allowance |
| TS | Thymidylate synthase |
| UL | Upper limit |
| UMFA | Unmetabolized folic acid |
| UNG | Uracil DNA glycosylase |
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