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iSmile Teeth Whitening Gel Refills (3 Pack)

iSmile • 3 x 3ml syringes

£12 - £18Strength: 35% (US Market Version)

What reviewers say on other sites

A balanced overview of public customer feedback gathered from sources like Amazon, Trustpilot, Reddit and beauty blogs. Summarised in our own words — never copied verbatim.

These refills are seen as a cost-effective way for existing users to continue their whitening regimen. Most reviewers who liked the original kit are happy with the refills. The most common negative feedback relates to the gel's potency, either causing sensitivity or, for some long-term users, providing diminishing returns on whitening.

What reviewers praise

Cost-effective for continued use, Same formula as the original kit, Works for maintaining results

Common complaints

Causes sensitivity for some, Results plateau over time, Gel can be thick or sticky

Source: synthesised from public reviews on third-party sites. Not a substitute for reading reviews yourself or for medical/dental advice.

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