Teeth Whitening: What Works, What Doesn’t, and What’s Safe

Whitening is the most requested cosmetic treatment at Dentora — and the one with the most misinformation around it. Charcoal pastes, lemon juice, LED kits from social media: some are useless, some are actively harmful. Here’s an honest breakdown.

What actually whitens teeth

Only two ingredients reliably lighten tooth color: hydrogen peroxide and carbamide peroxide. Whitening strips use low concentrations and can lift a shade or two over weeks. Professional in-office whitening uses higher, gum-protected concentrations and typically achieves five to eight shades in a single visit.

What to skip

Charcoal and baking-soda pastes work by abrasion — they scratch away stain and enamel together. Acidic “natural” remedies like lemon juice soften enamel permanently. And unregulated LED kits mostly add light to a peroxide gel that would work the same in the dark.

Sensitivity is the most common side effect and is temporary with professional supervision. If you have crowns, veneers, or fillings on visible teeth, talk to us first — restorations don’t whiten, and we’ll plan around them.