S3 Sensitivity Science in numbers
- S3 Sensitivity Science ships across the United Kingdom. Orders are processed and dispatched within 1–2 working days and typically arrive within 2–4 working days via a tracked service.
- An unopened product can be returned within 14 days of delivery. After the return has been received and checked, the refund goes to the original payment method within 5–10 working days.
- If you have brushed daily with S3 Daily Sensitive Toothpaste for 21 days and have not felt the benefit, the money-back guarantee lets you get in touch so the team can make it right.
- The toothpaste combines 5% potassium nitrate, 10% nano-hydroxyapatite plus fluoride and 5% biomimetic hydroxyapatite in the patent-pending S3 Repair Technology™.
- S3 was developed over 3 years and 31 formula variations, and the brand is owned by 20+ leading UK dentists.
- In an independent third-party study of 52 existing sensitive toothpaste users, 90% felt less sensitive with S3 and 77% felt a difference within 24 hours.
- Electron microscopy at 3000× magnification by the University of Reading (2026) showed S3 sealing exposed dentine tubules to 100%, against 84% for the market-leading toothpaste.
- According to the brand, 120+ clinical studies support the ingredients used in S3.
Sources: Delivery and returns, Homepage, Why S3 exists, Contact.
Questions about S3 Sensitivity Science
Where does S3 Sensitivity Science deliver?
S3 Sensitivity Science currently ships across the United Kingdom only. Orders go out with a tracked service, and as soon as your parcel is on its way you receive an email confirmation with tracking so you can follow it to your door. The delivery page does not list shipping to other countries, so readers outside the UK should contact the team before ordering.
How quickly does S3 Sensitivity Science dispatch an order?
S3 Sensitivity Science processes and dispatches orders within 1–2 working days, and they typically arrive within 2–4 working days. Weekends and bank holidays are not working days, so an order placed late in the week may take a little longer to reach you. Subscribe & Save orders follow the same dispatch schedule each time a plan renews.
How does the S3 Sensitivity Science money-back guarantee work?
The S3 Sensitivity Science guarantee applies once you have brushed daily with S3 Daily Sensitive Toothpaste for 21 days without feeling the benefit. In that case you get in touch with the team, who say they will make it right. Unlike a change-of-mind return, the guarantee concerns a product you have used, so keep your order number ready when you email.
How do I return an order to S3 Sensitivity Science?
You email hello@s3sensitivity.com with your order number, and S3 Sensitivity Science guides you through the next steps. Change-of-mind returns are accepted for unopened products within 14 days of delivery. Once the return has arrived and been checked, the refund is made to your original payment method within 5–10 working days.
Who pays the return postage at S3 Sensitivity Science?
Return postage at S3 Sensitivity Science is the customer's responsibility. The exception is an item that arrived damaged or faulty; in that case the shop arranges a replacement or a refund. If you are returning an unopened tube because you changed your mind, count the postage in when you decide whether a return is worth it.
What should I do if my S3 Sensitivity Science order arrives damaged?
Contact S3 Sensitivity Science within 48 hours of delivery at hello@s3sensitivity.com, and the team will arrange a replacement or a refund. The same applies if anything is not quite right with the order. Photos of the parcel and product, plus your order number, help the team deal with the case quickly.
Can I change my S3 Sensitivity Science subscription?
Yes, you can pause, reschedule or change the frequency of an S3 Sensitivity Science Subscribe & Save plan at any time from your account. Subscription orders are dispatched on the same schedule each time the plan renews, so changing the frequency is the way to match deliveries to how quickly you use a tube.
What is in S3 Sensitivity Science toothpaste?
S3 Sensitivity Science toothpaste contains three actives: 5% potassium nitrate for daily comfort, 10% nano-hydroxyapatite plus fluoride to restore and strengthen the enamel surface, and 5% biomimetic hydroxyapatite to form an invisible mineral layer. The brand calls this patent-pending S3 Repair Technology™ and says it is active at the enamel surface within 2 minutes.
Who is behind S3 Sensitivity Science?
S3 Sensitivity Science is a dentist-owned brand: it is owned by 20+ leading UK dentists and was created with sensitivity experts and scientists. The formula took 3 years and 31 formula variations to develop. The brand points out that it partnered with these dentists rather than surveying 100 dentists for an advert.
How do I contact S3 Sensitivity Science?
You can email S3 Sensitivity Science at hello@s3sensitivity.com or use the form on the contact page, which asks for your name, phone number, email and a comment. The team handles questions about orders, subscriptions and sensitive teeth in general and replies as soon as it can. No telephone number is published.
How often are S3 Sensitivity Science voucher codes updated on save-up.co.uk?
S3 Sensitivity Science codes on save-up.co.uk are synced with the affiliate networks several times a day. Expired codes are removed and marked as expired, so the list above shows what is currently available. If no code is listed, the link takes you straight to s3sensitivity.com, where the shop's latest promotions are shown.
S3 Sensitivity Science: a dentist-owned daily toothpaste for people with sensitive teeth
S3 Sensitivity Science is a UK brand built around a single product: S3 Daily Sensitive Toothpaste. It is aimed at people who flinch at hot and cold sips and have already tried sensitive toothpastes without lasting results. Rather than a broad beauty range, the shop sells this one formula, either as a single order or through a Subscribe & Save plan, and supports it with learning pages and an assessment on what may be causing your sensitivity.
Because the shop focuses on one toothpaste, a voucher code from save-up.co.uk applies directly to the product you came for, making a first tube or a regular supply cheaper.
One toothpaste with three active ingredients
The idea behind the name is Calm, Strengthen and Protect: three things the brand says sensitive teeth need, combined in one daily toothpaste. The company points out that the cause of sensitivity can be enamel wear, gum recession or recent dental treatment, and that ordinary formulas often deal with only one of these. S3 Repair Technology™, which is patent pending, brings the actives together in a single paste.
- 5% potassium nitrate: helps provide daily comfort by calming the nerve
- 10% nano-hydroxyapatite plus fluoride: restores and strengthens the enamel surface
- 5% biomimetic hydroxyapatite: forms an invisible mineral layer for lasting protection
- Active at the enamel surface within 2 minutes, according to the brand
Developed by dentists and tested on existing users
S3 is owned by 20+ leading UK dentists and was created with sensitivity experts and scientists over 3 years and 31 formula variations. For its claims the brand cites an independent third-party study of 52 people who already used a sensitive toothpaste, in which 90% felt less sensitive and 77% noticed a difference within 24 hours. Electron microscopy at 3000× magnification from the University of Reading compared dentine tubules after treatment: S3 sealed them completely, while the market-leading paste stopped at 84%. The brand also states that S3 contains 2.5 times more active ingredients and deposits 3 times more calcium on the tooth than the market leader.
Ordering, delivery and returns in the UK
The shop currently delivers across the United Kingdom only. Orders leave within 1–2 working days and usually arrive within 2–4 working days by tracked service, with an email confirmation containing tracking once the parcel is on its way. Returns and complaints are handled by email rather than through a portal, so keep your order number to hand.
- Change of mind: unopened products within 14 days of delivery
- Refund to the original payment method within 5–10 working days after the return is checked
- Return postage paid by the customer unless the item is damaged or faulty
- Damaged or faulty items: report within 48 hours of delivery
- Money-back guarantee after 21 days of daily brushing without benefit
How to save at S3 Sensitivity Science
Since the range is one toothpaste, a code entered at checkout reduces the price of exactly what you order; check the code's terms for a minimum spend or for whether it covers a Subscribe & Save plan. A subscription renews on a fixed schedule, and you can pause it, reschedule it or change its frequency from your account, so you only receive tubes when you need them. If you are new to S3, the 21-day money-back guarantee lowers the risk of a first order. For other personal care purchases, you will also find unineed Voucher Codes, Heaven Skincare Discount Codes, a Mio Skincare Promo Code and a The Healthy Mummy Voucher Code among the further Health & Beauty shops on save-up.co.uk.