Dehydrated mushrooms can be stored in airtight packages for more than 1 year ). However, there is no information on the effects of such long-term storage on the amount and stability of vitamin D in the dried mushrooms. Moreover, information on the stability of vitamin D in foods are generally limited. Research in this field focuses mainly on dairy products: yogurts, ice cream , cheese and milk . Several studies describe the stability of ergocalciferol in mushrooms during storage: frozen chanterelles , UV irradiated fresh button mushrooms stored in the refrigerator or at room temperature