Teeth Whitening Strips — What You Need to Know 1. Most whitening strips contain hydrogen peroxide or use blue pigment technology to enhance the whiteness of your teeth. To make sense of health reels on social media, follow me now — and stick around, I’ll also tell you what dentists have to say. 2. They’re generally safe if used once a week, provided they don’t contain abrasives. But remember: they’re not a forever solution. You still need to maintain good oral hygiene and visit your dentist regu