| MMSE | Mini-mental state examination |
| HoloTC | Holotranscobalamin—functional indicator of metabolically active fraction of vitamin B12 |
| MMA | methymalonic acid—an indicator of vitamin B12 status, a higher MMA status indicates a lower vitamin B12 status |
| PLP | Pyridoxal-5-phosphate—a measure of vitamin B6 status |
| EGRAC | Erythrocyte glutathione reductase activation coefficient—a functional indicator of riboflavin status, a higher ratio indicates a lower riboflavin status |
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