4-Terpineol (terpinen-4-ol) tea tree oil ka main active component hai. Ismein antimicrobial, anti-inflammatory aur antioxidant properties hoti hain. Yeh acne, fungal infections aur minor skin issues ke liye topical formulations mein use hota hai. Oily aur acne-prone skin ke liye accha rehta hai kyunki bacteria aur inflammation ko control karta hai.