Dose-Response Effect of Sunlight on Vitamin D2 Production in Agaricus bisporus Mushrooms

• Published in: Journal of Agricultural and Food Chemistry
• Main Authors: Urbain, Paul, Jakobsen, Jette
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2015
• Subjects: Agaricus bisporus; UV-B; dose−response; ergocalciferol; mushroom; sunlight; vitamin D; Atlantic salmon
• Online Access: https://orbit.dtu.dk/en/publications/5eeacbec-d7ad-44b5-80e3-4766f49e2b94; https://doi.org/10.1021/acs.jafc.5b02945

The dose response effect of UV-B irradiation from sunlight on vitamin D2 content of sliced Agaricus bisporus (white button mushroom) during the process of sun-drying was investigated.Real-time UV-B and UV-A data were obtained using a high-performance spectroradiometer. During the first hour of sunlight exposure, the vitamin D2 content of the mushrooms increased in a linear manner, with concentrations increasing from 0.1 μg/g up to 3.9 ± 0.8 μg/g dry weight (DW). At the subsequent two measurements one and 3 h later, respectively, a plateau was reached. Two hours of additional exposure triggered a significant decline in vitamin D2 content. After just 15 min of sun exposure and an UV-B dose of 0.13 J/cm(2), the vitamin D2 content increased significantly to 2.2 ± 0.5 μg/g DW (P <0.0001), which is equivalent to 17.6 μg (704 IU) vitamin D2 per 100 g of fresh mushrooms and comparable to levels found in fatty fish like the Atlantic salmon.