Store-bought mushrooms actually have a trick up their sleeve for boosting nutrition, and it involves nothing more than a little sunlight. when those fungi get exposed to the sun, the natural compound ergosterol inside them transforms directly into Vitamin D2, a process that mirrors exactly how human skin synthesizes its own supply. this isn't just some niche biological quirk; even commercially purchased varieties can significantly increase their nutrient content after a brief period of solar exposure. placing them on a tray outside essentially charges your food with solar energy conversion, turning a short duration of sunbathing into a real nutritional upgrade before you even start cooking. #Nutrition