Beelman-Mushroom story-100

Beelman-Mushroom story-100

Mushroom coloring image

Exposing mushrooms to constant ultraviolet light will increase the level of vitamin D -- but, as this photo shows, it makes the mushrooms brown and causes discoloration, which may be unappealing to consumers. A technique developed by Penn State researchers uses fast bursts of ultraviolet light to quickly increase vitamin D without discoloring the mushrooms.

Image: Penn State