Calvo MS, Babu US, Garthoff LH, Woods TO, Dreher M, Hill G, Nagaraja S. “Vitamin D(2) from light exposed edible mushrooms is safe, bioavailable and effectively supports bone growth in rats”. Osteoporos Int. 2012 FEb. 23 (Epub ahead of print).
According to the study, vitamin D(2) from UVB-exposed mushrooms is bioavailable, safe, and supports bone growth and mineralization in a growing rat model without evidence of toxicity.