Vitamin D from sunlight in North Korea
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 North Korea.
| City | Latitude | Elevation | Vitamin D winter |
|---|---|---|---|
| Pyongyang | 39.03°N | 43 m | 6 Nov – 12 Feb (99 days) |
| Hamhŭng | 39.92°N | 16 m | 2 Nov – 16 Feb (107 days) |
| Namp’o | 38.74°N | 9 m | 7 Nov – 11 Feb (97 days) |
The same sun that makes vitamin D also burns. UV index and sunburn times in North Korea →