| 5-MTHF | 5-methyltetrahydrofolate |
| BHMT | Betaine–homocysteine S-methyltransferase |
| BMI | Body mass index |
| CBS | Cystathionine β-synthase |
| CSE | Cystathionine γ-lyase |
| Cys | Cysteine |
| DMG | Dimethylglycine |
| FA | Folic acid |
| Hcy | Homocysteine |
| MAT | Methionine adenosyltransferase |
| MTHFR | Methylenetetrahydrofolate reductase |
| OCM | One-carbon metabolism |
| SAH | S-adenosylhomocysteine |
| SAM | S-adenosylmethionine |
| tCys | Total cysteine |
| tHcy | Total homocysteine |
| THF | Tetrahydrofolate |