ScienceDaily (Oct. 27, 2009) — Millions of children in the United States between the ages of 1 and 11 may suffer from suboptimal levels of vitamin D, according to a large nationally representative study published in the November issue of Pediatrics, accompanied by an editorial.[MORE]
A Solution... Light-zapped mushrooms filled with vitamin D - Bringing 'shrooms out of the dark packs them with sunshine nutrient
Mushrooms may soon emerge from the dark as an unlikely but significant source of vitamin D, the sunshine vitamin that helps keep bones strong and fights disease. Researchers found that 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.[MORE]
Similar to the way that humans absorb sunlight and convert it to vitamin D, mushrooms contain a plant sterol–ergosterol–that converts to vitamin D when exposed to sunlight. Check out the resources below for more information on vitamin D.
And here's the data from Penn State University...Post-harvest Vitamin D Enrichment of Fresh Mushroom.