Vitamin D from sunlight in Puerto Rico
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 Puerto Rico.
| City | Latitude | Elevation | Vitamin D winter |
|---|---|---|---|
| San Juan | 18.47°N | 7 m | none |
| Bayamón | 18.40°N | 16 m | none |
| Carolina | 18.38°N | 16 m | none |
The same sun that makes vitamin D also burns. UV index and sunburn times in Puerto Rico →