The Study proposed by the Food and Drug Administration is funded by Mushroom Council.
If the study holds true, it would benefit those who don't eat fish or milk, which is today the major fortified source of the important vitamin.
According to the ongoing study, a single serving of white button mushrooms will contain 869 percent the daily value of vitamin D once exposed to just five minutes of UV light after being harvested . If confirmed, that would be more than what's in two tablespoons of cod liver oil, according to the National Institutes of Health.
Details of the study were being presented this week at the FDA's annual science forum.
The study will help Americans who spend most of their time indoors especially in winters.
Vitamin D helps keep bones strong and fights disease and is increasingly thought to play a role in reducing the risk of osteoporosis, cardiovascular disease and tooth loss, as well as in reducing mortality associated with colon, breast, prostate and other cancers.
