Yes — and this is actually where One Smile stands out. Our formula uses PAP instead of hydrogen peroxide, which means it works on surface stains without penetrating the enamel. We also include Potassium Citrate, specifically added to reduce sensitivity during treatment, and Hydroxyapatite to remineralise and protect your enamel while you whiten. If you have active cavities or specific dental concerns, we always recommend checking with your dentist first.

The PAP whitening results are long-lasting — how long depends on your habits. Coffee, wine, tea and smoking will gradually reintroduce surface stains over time. Most customers do a full 7-day cycle once a month to maintain their results. That's why our monthly maintenance pack exists.

One Smile works on natural tooth enamel only. Crowns, veneers, bridges and other dental restorations won't change colour with whitening treatments of any kind — including ours. If you have significant dental work, we recommend consulting your dentist before starting any whitening routine.

Once daily for 7 consecutive days for the initial cycle. After that, one session per week is enough to maintain your results. If you're a heavy coffee drinker or smoker, you may want to repeat the full cycle once a month.

Most customers notice a visible difference after the very first session — that's the purple colour correction working immediately. Significant whitening from the PAP formula typically shows within 3 to 5 days of consistent use. Full results after the complete 7-day cycle.

We offer a full 30-day money-back guarantee — no conditions, no small print, no questions asked. If you complete the cycle and aren't happy with your results, contact us at hello@onesmile.com and we'll refund you in full. Simple as that.

European orders are delivered within 2–4 business days from shipment. International orders outside Europe may take longer depending on the destination country. Orders are not dispatched on public holidays.

Yes — shipping is always free on every order, worldwide. No minimum spend required.

Once your order has been shipped, you'll receive a confirmation email with your tracking number. If you have any issues tracking your order, contact us through the form on our website.

Contact us immediately through the contact form on our website and we'll resolve it as quickly as possible.

Simple — every month, your chosen pack (1, 2 or 3) is automatically shipped to your door. No effort, no reordering. Just a fresh supply of One Smile, every month.

Simply reach out through the contact form on our website within 30 days of your purchase. No questions asked, no hassle.

One Smile works on natural tooth enamel only. Crowns, veneers, bridges and other dental restorations won't change colour with whitening treatments of any kind — including ours. If you have significant dental work, we recommend consulting your dentist before starting any whitening routine.

Once daily for 7 consecutive days for the initial cycle. After that, one session per week is enough to maintain your results. If you're a heavy coffee drinker or smoker, you may want to repeat the full cycle once a month.

Most customers notice a visible difference after the very first session — that's the purple colour correction working immediately. Significant whitening from the PAP formula typically shows within 3 to 5 days of consistent use. Full results after the complete 7-day cycle.

We offer a full 30-day money-back guarantee — no conditions, no small print, no questions asked. If you complete the cycle and aren't happy with your results, contact us at hello@onesmile.com and we'll refund you in full. Simple as that.