Mushrooms exposed to the sun can provide as much vitamin D as a health supplement, a study has found.
Researchers recommend people take the fungi out of their wrapping and leave them outside for half an hour before eating.
Much like our skin, mushrooms transform ultraviolet light from the sun into the vitamin and continue to do so even after they have been harvested. The nutrient is essential for the immune system, strong healthy bones and teeth and the absorption of calcium.
In the study, 30 adults were given a daily capsule for 12 weeks containing either 2,000 units of vitamin D, or sun-exposed mushroom powder with high-levels of the nutrient. At the end of the trial, there was no significant difference in the participants’ vitamin D levels.
'These results provide evidence that ingesting mushrooms which have been exposed to ultraviolet light and contain vitamin D2, are a good source of vitamin D that can improve the vitamin D status of healthy adults.