Translations:Ergocalciferol/17/en

Biosynthesis

The vitamin D₂ content in mushrooms and C. arbuscula increase with exposure to ultraviolet light. Ergosterol (provitamin D₂) found in these fungi is converted to previtamin D₂ on UV exposure, which then turns into vitamin D₂. As cultured mushrooms are generally grown in darkness, less vitamin D₂ is found compared to those grown in the wild or dried in the sun.