Researchers at McGill University have discovered that moderate ultraviolet (UV) light exposure is best when the technique is used to enhance vitamin D₂ in edible mushrooms. Excessive exposure leads to nutrient degradation or a plateau effect, they found. The paper also provides quantitative guidance.
The researchers’ work supports efforts to address vitamin D deficiency, which affects between 30 and 50 per cent of the world’s population, as well as enhance the nutritional value of mushrooms more broadly.














