Folate composition of 10 types of mushrooms determined by liquid chromatography-mass spectrometry

► Ten types of mushrooms were sampled from U.S. retail outlets and major producers. ► Folate (5-CH3-H4folate, 10-HCO-folate, 5-HCO-H4folate) was analysed by LC-MS. ► Chanterelle and morel had the least folate (<6 μg/100 g); oyster had the most (44.2). ► 5-CH3-H4folate predominated in enoki, oyster, and crimini mushrooms. ► Total folate and the vitamer composition varied widely among samples of some types.