

Review
Colgate's Max White Purple Serum is a colour-correction product that uses purple pigments to counteract yellow tones on teeth – basically optical whitening rather than chemical bleaching. The 40ml bottle comes with a simple applicator brush, making application straightforward and mess-free.
What works well here is the immediate visual impact. Within seconds of application, teeth appear noticeably whiter through the neutralising effect of the purple pigment. The micro-polishing minerals add a gentle polishing action without being abrasive, which is important for daily use. The formula is lightweight and doesn't feel sticky or thick, so it won't interfere with talking or smiling shortly after application. It's also water-resistant enough to last through eating or drinking for a reasonable timeframe.
This serum is ideal for people who want quick whitening results for specific events – first dates, presentations, photo sessions – without committing to weeks of whitening trays or strips. It's equally useful for those who've had professional whitening and want to maintain that brightness between appointments.
The main limitation is that it's purely cosmetic. You're correcting appearance, not actually whitening teeth chemically, so results fade once removed. If you have deeply stained teeth from years of coffee or smoking, this won't address root discolouration. Some people also find the purple shade takes practice to blend seamlessly if they're going for a natural look.
At 55% off, this is genuinely good value. Even at full price it's reasonable, but at £7.49, it's a no-brainer for anyone who wants an easy cosmetic boost. I'd recommend it as part of a broader whitening routine rather than a standalone solution, but for immediate results, it absolutely delivers.