Vitamin D
Dietary intake
In general, vitamin D2 is found in fungi and vitamin D3 is found in animals. Vitamin D2 is produced by ultraviolet irradiation of ergosterol found in many fungi. The vitamin D2 content in mushrooms and Cladina arbuscula, a lichen, increase with exposure to ultraviolet light. This process is emulated by industrial ultraviolet lamps, concentrating vitamin D2 levels to higher levels.
Vitamin D-52