What's inside mushrooms, and where does it go in your body?
Not plants at all. UV-exposed mushrooms are one of the only non-animal sources of vitamin D.
Notable for
Riboflavin, niacin, selenium, copper; vitamin D2 when UV-treated.
Evidence & sources
Mushrooms exposed to UV light contain vitamin D2. Evidence: established. Known: Listed in the NIH food-source table. Unknown: Mushrooms not exposed to UV contain very little vitamin D. Source: NIH Office of Dietary Supplements, Vitamin D Fact Sheet for Health Professionals (Current revision).