Clinical studies on carbamide peroxide and hydrogen peroxide — the two actives in the Advanced Whitening Kit — suggest that most people notice visible change within the first one to two weeks of consistent daily use. Hydrogen peroxide tends to show earlier movement; carbamide peroxide builds progressively over the same window, with most of its effect front-loaded into the first two weeks.
For the Advanced Whitening Strips, PAP works progressively and cumulatively. Clinical evidence supports visible whitening after the first few sessions, with results continuing to develop across the routine. It’s a gentler, steady-building ingredient rather than the fastest — but consistently comfortable.
Results genuinely vary. Everyday surface staining from coffee, tea and food responds fastest. Deeper or older discolouration — from certain medications or dental history — can take longer or may need professional treatment alongside at-home whitening. If you have any concern about your situation, a dentist can give you an honest picture before you start.
We always recommend a Day 1 photo. The real comparison is before and after — and our 30-Day Smile Challenge is built around exactly that.