Our assessment
Several buyers report relief from tooth sensitivity within a day or two and describe the pen as easy to apply alongside a toothpaste they already tolerate. The sample splits sharply on whether it works at all, with one buyer saying a leading sensitive toothpaste works faster and one saying it did nothing. The sample is small and the low-star tail is comparatively thick, so the honest read is mixed rather than settled.
Buy nowEvidence note: we sampled 8 customer comments for this exact product on October 12, 2026. We do not reproduce them here. This sample is not representative of every buyer; the site score instead uses the marketplace-wide average and rating count.
In brief
This is a sensitivity serum gel applied with a pen applicator, formulated with potassium nitrate and nano hydroxyapatite and sold around reducing tooth sensitivity and supporting enamel rather than whitening. The marketplace average is 4.1 out of 5 across roughly 430 ratings. The distribution is looser than most: 62 percent at five stars, 14 percent at four, and a one-star tail of about 11 percent. The sample is small, eight comment bodies rather than the 13 we usually capture, so it can describe what a handful of buyers report but cannot settle how well the product works.
What the sample agrees on, and where it splits
The consistent positive is relief that buyers say arrives fast. Several describe a sensitive tooth easing within a day or two of starting, and one describes a night of significant pain followed by relief once the gel arrived and was used through the day alongside a sensitive toothpaste. They describe it as easy to apply and easy to work into an existing routine.
A second theme is that this is not a whitening product, and one buyer makes a point of saying so: they bought it for sensitivity, not colour, and use it because they cannot tolerate a fluoride toothpaste. We pass that on as that buyer’s stated reason, not as a recommendation.
Where the sample splits is on whether it works at all. One buyer who gave it a single star says a leading sensitive toothpaste works faster and lasts longer. Another three-star buyer reports it did nothing for their pain. Against those, one buyer with veneers and ongoing sensitivity attributes real improvement to the ingredients, describing the potassium nitrate as calming nerve pain and the hydroxyapatite as helping rebuild exposed enamel over time. That is a buyer’s explanation, not a measured clinical outcome, and this sample cannot confirm it.
The practical complaint is quantity. One buyer notes you can see how little is left in the applicator and that it runs out quickly, and Amazon’s summary of the wider corpus records the same disagreement about how long a pen lasts.
Two limits belong in the open. Sensitivity has causes a serum cannot address, and one buyer’s own account of veneer preparation and nerve pain points at the kind of underlying issue a dentist should look at rather than a home gel. Nothing here is dental advice, and a persistent sensitive tooth is worth a professional look.
We have not tested this gel.
Bottom line
Worth considering as an add-on for occasional, mild sensitivity alongside a toothpaste you already tolerate, and not as a substitute for dental care. The reservation is that this is a small sample with a comparatively thick low-star tail, and the split between buyers who get fast relief and buyers who get none is real rather than noise. The score shown for this product comes from the marketplace-wide rating and its rating count, not from these 8 comments. No individual customer review is reproduced here.