3F Patch Test and Dermatest Scope

IN BRIEF

The brand-held 2023 3F records include a 30-person ProBM patch test with an average reaction score of 0.00 and a 30-person Dermatest Excellent assessment.
These are product-specific tolerability observations, not a guarantee that every skin type will react the same way.
They do not establish pregnancy safety, immediate post-laser suitability or compatibility with microneedling.

What was tested for 3F?

The records describe the tested 3F product’s skin tolerability under specified conditions. — A text illustration of this section’s reading rule, not a test photograph.

Keep the evidence in its own lane

A group result is not a guarantee for an individual.

A measurement applies to its stated sample, conditions and period.

A separate-product study is not a test of a combined routine.

Explanatory diagram. Not a test photograph or a plot of individual results. Measurements describe the tested group under the stated conditions.

The records describe the tested 3F product’s skin tolerability under specified conditions. The 2023 ProBM primary-irritation patch test involved 30 participants and recorded an average reaction score of 0.00. A separate 2023 Dermatest assessment involved 30 participants and received an Excellent rating.

These are separate documents, not two names for the same study. The product identity matters as much as the favorable outcome: a record for 3F should not become a statement that all six narinfla products passed that exact test.

The supplied records describe the tested 3F sample. They do not independently establish its identity with the current retail formula or support claims about other conditions, combinations or future reformulations.

What is a patch test designed to observe?

A patch test observes skin reactions during localized contact under the protocol’s exposure and reading conditions. Dermatest’s public method description explains the use of self-adhesive patches, occlusive exposure and repeated readings after patch removal.

This is more specific than asking whether a product “feels gentle.” The location, duration and scoring system create a structured tolerability observation. The public explanation is useful background, but it is not a substitute for the product’s own certificate and report.

A recorded score of 0.00 applies to the assessed group and protocol. It is not a mathematical proof that no future user can experience irritation or allergy. A small tested group cannot encompass every medical history or every way a product might be used.

Localized patch test

A specified contact-and-reading procedure that examines reactions under its conditions.

Extended use study

Repeated use on the intended application site over an established period. It answers additional questions only when that design was actually conducted.

Does Excellent mean a four-week facial-use study?

Not by itself. Dermatest publicly distinguishes its original patch-test seal from more extensive application-study categories, including its five-star category. The rating word should not be used to invent a more elaborate test design.

We therefore identify the actual 3F assessment rather than describing it as a five-star, long-term or whole-face study without the corresponding documentation. A recognizable badge can be helpful; a precise description is more helpful.

The same restraint applies to efficacy. Passing a tolerability assessment does not establish wrinkle improvement, pigment reduction or pore changes. Those outcomes belong to their own finished-product studies and measurement methods.

Which situations remain outside these records?

Pregnancy, nursing and use immediately after a procedure are not established by these patch-test results. A favorable skin-reaction score does not answer pregnancy-specific exposure questions or show suitability on skin whose barrier has been deliberately disrupted.

Laser procedures and microneedling vary substantially. We do not treat “tested on skin” as permission to apply 3F immediately afterward, nor do we claim that a home microneedling device becomes safe because the ampoule has a favorable rating.

Combinations need attention as well. Layering an ampoule with a strong active can create a different use situation from the tested protocol. A five-minute waiting rule is not a universal safety solution and is not established by the patch records.

How should you use this information at home?

Use it to understand the available tolerability evidence while still respecting your own response. Follow the product directions, avoid damaged skin and introduce products cautiously rather than assuming a favorable test removes every uncertainty.

Trying a small amount on an appropriate area may help you observe your response, but a home trial is not a formal diagnostic allergy test. Do not use it to rule out a known allergy or to override advice from your clinician.

Persistent burning, redness or other concerning changes deserve attention rather than a reassurance based on a badge. For pregnancy, nursing, active skin disease or recent treatment, ask your clinician about the specific product and circumstances.

Our aim is to make the evidence easy to recognize: product name, institution, participant count, observation type and result. Keeping the limits visible is part of explaining a favorable result honestly.

FAQ

Questions & answers

Does a reaction score of 0.00 mean zero allergy risk?

No. It describes the group’s observed score under the patch protocol, not every possible future user or exposure.

Can the 3F assessment be used for the cream or cleanser?

No. Each product needs its own matching record. A brand-wide safety statement cannot be built from one ampoule’s report.

Does a patch-test reaction score measure wrinkle improvement?

No. The reaction score describes skin compatibility under the patch-test conditions, not a wrinkle-efficacy result.

Sources and scope

ProBM primary irritation patch test, 2023; Dermatest GmbH assessment, 2023
Brand-held 3F records: 30 participants per named test; patch reaction score 0.00 and Dermatest Excellent. Not a six-product blanket certification.
Dermatest: Standard patch test
Public explanation of localized occlusive testing and timed reaction readings, not the specific narinfla certificate.
Dermatest: Original guarantee seal and study categories
Public distinction between brief localized patch testing and more extensive application studies; do not equate Excellent with a five-star four-week use study.
Technical document on cosmetic claims, Claims Sub-Working Group, 3 July 2017, Annexes I–II
Non-binding best-practice guidance on relevant evidence, product identity, study conditions and avoiding exaggerated interpretations; not a narinfla trial or European Commission legal ruling.
narinfla official English product information
Official brand hub; consult the corrected version for product-specific information. Not a public archive of the full clinical reports.

A 3F patch test and an Excellent rating: what each can tell you