Do peroxide-free teeth whitening treatments work? There are quite a few non-peroxide teeth whitening products available on the market, and some work better than others. It really depends on the type of whitening product and the whitening ingredient. Find out if teeth whitening kits could get you the results you want Peroxide-free whitening products like toothpaste and mouthwash are less likely to show huge differences in the colour of your teeth, whereas whitening pens, strips and kits are more likely to noticeably whiten your teeth. Some of the most common whitening ingredients that peroxide-free whitening products use include: Sodium bicarbonate Charcoal Papain and Bromelain extracts Phthalimidoperoxycaproic acid (PAP) Coconut oil