| Vitamin D2 | Ergocalciferol |
| Vitamin D3 | Cholecalciferol |
| PTH | Paratharmone/parathyroid hormone |
| 25(OH)D | 25 hydroxy vitamin D |
| 25(OH)D2 | 25 hydroxy ergocalciferol |
| 25(OH)D3 | 25 hydroxy cholecalciferol |
| 1,25(OH)2D | 1,25 dihydroxy vitamin D |
| 1,25(OH)2D2 | 1,25 dihydroxy ergocalciferol |
| 1,25(OH)2D3 | 1,25 dihydroxy cholecalciferol |
| nmol/L | nano moles per liter |
| pmol/L | pico moles per liter |
| SD | standard deviation |
| CI | confidence interval |
| MD | Mean difference |
| Δ | Change |
| IU | International units |
| RIA | Radioimmunoassay |
| HPLC | High performance liquid chromatography |
| LCMS | Liquid chromatography mass spectrometry |
| RCT | Randomized controlled trial |
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