Lactose ek natural sugar hai jo milk se aata hai. Skincare mein isse humectant ki tarah use hota hai jo skin ko hydrated rakhne mein madad karta hai. Yeh skin ke surface par paani ko attract karke hold karta hai, jisse skin soft aur moisturized rehti hai. Kuch products mein isse carrier aur bulking agent ke taur par bhi add kiya jata hai.