Analysis results of vitamin d (d2, d3) in domestically produced wood ear mushrooms- changes due to uv irradiation time

Mushrooms often contain ergosterol, which is converted to vitamin D2 by ultraviolet irradiation. It has been reported that ingesting ergosterol may help prevent dementia and depression by preventing osteoporosis, protecting the brain, and promoting the secretion of the neurotransmitter serotonin. Therefore, this study focused on wood ear mushrooms, which have a high vitamin D content according to the Japanese Food Analysis Table, and investigated whether the vitamin D2 content of dried wood mushroom ears can be increased by irradiating them with ultraviolet light (UV253.7nm). Using domestically produced wood ear mushrooms (manufactured by Kikurage Farm Inazawa Co., Ltd.), the vitamin D (vitamin D2 and vitamin D3) content of fresh, dried, dried (1 hour UV irradiation), dried (2 hours UV irradiation), and dried (3 hours UV irradiation) samples was analyzed by the Japan Food Analysis Center The results showed no significant difference between 1-hour and 2-hour UV irradiation, but 3-hour UV irradiation resulted in a vitamin D content approximately 1.5 times higher (127 µg) than the vitamin D value (84 µg) listed in the Japanese Food Analysis Table for wood ear mushrooms. In the future, considering the potential application of domestically cultivated wood ear mushrooms as disaster food and space food, we aim to enhance their value as a food ingredient by managing "moisture content," "particle size," and "UV irradiation conditions" to maximize their vitamin D2 nutritional value.