Vitamin D from sunlight in Bulgaria
How long you need in the sun to make vitamin D, and when the sun is too low to make any at all, for 3 cities in Bulgaria.
| City | Latitude | Elevation | Vitamin D winter |
|---|---|---|---|
| Sofia | 42.70°N | 562 m | 25 Oct – 24 Feb (123 days) |
| Plovdiv | 42.15°N | 163 m | 26 Oct – 23 Feb (121 days) |
| Varna | 43.22°N | 83 m | 22 Oct – 27 Feb (129 days) |
The same sun that makes vitamin D also burns. UV index and sunburn times in Bulgaria →