Silent Hunter

Mushrooms Produce Vitamin D Mushrooms are the only food in the fresh produce section that produce vitamin D. When exposed to ultraviolet light from sunlight or an ultraviolet lamp, nearly all edible mushrooms produce significant amounts of Vitamin D. Some create as nearly as much as over-the-counter Vitamin D supplements. Like humans, mushrooms contain a pro-vitamin called ergosterol that they convert into vitamin D in the presence of ultraviolet light. White mushrooms, button mushrooms, crimini or brown mushrooms, portabella mushrooms, and maitake mushrooms are all excellent producers of Vitamin D.