Willow bark extract (Salix species se milta hai) mein salicin hota hai, jo naturally salicylic acid ka precursor hai. Yeh skincare mein mild exfoliation ke liye use hota hai, skin ki inflammation kam karta hai, aur antimicrobial benefits bhi deta hai. Isse aksar ek gentle aur natural alternative ki tarah recommend kiya jaata hai — sensitive skin waalon ke liye bhi suitable ho sakta hai.