Yeh 'safeguard against environmental toxins' ek marketing term hai, kisi ek ingredient nahi. Isme mainly antioxidants hote hain jaise Vitamin C, Vitamin E, niacinamide, ya botanical polyphenols. Ye ingredients pollution aur free radicals se skin ko protect karte hain aur oxidative stress ko neutralize karte hain. Basically antioxidant-rich ingredients use hote hain is tarah ke claims ke liye.