VeganHealth.org: Vitamin D2 in Mushrooms

I added some research on vitamin D2 in mushrooms to the Bones, Vitamin D, and Calcium page at VeganHealth.org:

Vitamin D2 in UV Treated Mushrooms

Food manufacturers are now creating large amounts of vitamin D2 in mushrooms by exposing them to commercial ultraviolet light or direct sunlight (55, 56). The vitamin D is well-retained in the mushrooms over the course of the typical storage life of fresh mushrooms, up to two weeks (55, 57). This vitamin D is effective in improving vitamin D status and no different from a vitamin D2 supplement (2).

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References

2. Urbain P, Singler F, Ihorst G, Biesalski HK, Bertz H. Bioavailability of
vitamin Dâ‚‚ from UV-B-irradiated button mushrooms in healthy adults deficient in
serum 25-hydroxyvitamin D: a randomized controlled trial. Eur J Clin Nutr. 2011
Aug;65(8):965-71. doi: 10.1038/ejcn.2011.53. Epub 2011 May 4. | link

55. Kalaras MD, Beelman RB, Elias RJ. Effects of postharvest pulsed UV light treatment of white button mushrooms (Agaricus bisporus) on vitamin D2 content and quality attributes. J Agric Food Chem. 2012 Jan 11;60(1):220-5. | link

56. Simon RR, Phillips KM, Horst RL, Munro IC. Vitamin D mushrooms: comparison of the composition of button mushrooms (Agaricus bisporus) treated postharvest with UVB light or sunlight. J Agric Food Chem. 2011 Aug 24;59(16):8724-32. | link

57. Roberts JS, Teichert A, McHugh TH. Vitamin D2 formation from post-harvest UV-B treatment of mushrooms (Agaricus bisporus) and retention during storage. J Agric Food Chem. 2008 Jun 25;56(12):4541-4. | link

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