Table 3. Content of vitamin D2 in sunlight exposed mushrooms
| Food name | Exposed location | Type | Exposed time (h) | Concentration2) (μg/kg) |
| Vitamin D2 |
| Raw shiitake | Indoor | Whole | 1 | ND1) |
| Sliced | 1 | ND |
| Outdoor | Whole | 1 | 35.5 |
| 3 | 27.4 |
| 6 | 44.7 |
| 12 | 303.4 |
| Sliced | 1 | 47.9 |
| 3 | 42.5 |
| 6 | 138.9 |
| 12 | 200.1 |
| Dried shiitake | Indoor | Sliced | 1 | ND |
| Outdoor | Sliced | 1 | 138.3 |
| 3 | 941.0 |
| 6 | 1,422.7 |
| 12 | 1,520.2 |
| Dried wood ear | Indoor | Whloe | 1 | 717.6 |
| 3 | 718.9 |
| 6 | 546.7 |
| Outdoor | Whloe | 1 | 577.0 |
| 3 | 624.1 |
| 6 | 672.0 |
| Enokitake | Indoor | Whole | 1 | ND |
| Outdoor | Whole | 1 | 81.3 |
| 3 | 74.9 |
| 6 | 111.2 |
| Oyster mushroom | Indoor | Whole | 1 | ND |
| Outdoor | Whole | 1 | 29.8 |
| 3 | 67.8 |
| 6 | 103.9 |
| King oyster mushroom | Indoor | Whole | 1 | ND |
| Outdoor | Whole | 1 | 15.5 |
| 3 | 13.7 |
| 6 | 41.1 |
ND, not detected.
Moisture correction concentration.