Ergosterol ek fungal sterol hai jo vitamin D2 ka precursor hota hai. Skincare mein iska use antioxidant aur skin-conditioning properties ke liye hota hai. UV exposure ke time ye ergocalciferol mein convert ho sakta hai jo skin barrier aur membrane ko support karta hai. Oily aur combination skin ke liye helpful hai aur skin ko healthy aur protected rakhne mein madad karta hai.