skininsider

What the skincare industry knows and does not tell you

Dispatch 6 August 2026Published independentlyNo affiliate links here
Section

Every word on the front has been chosen to be defensible

What clinically proven is permitted to mean, how dermatologist tested differs from dermatologist recommended, how natural and free from claims work legally, what sits in a claims dossier, and what happens when a claim is challenged.

Every word on the front has been chosen to be defensible
Every word on the front has been chosen to be defensible
6 articles

Two phrases do most of the work on a skincare front of pack, and neither means what a shopper reads into it. If you read one thing in this section, read what clinically proven is allowed to mean: the phrase has no fixed definition in cosmetics, and what sits behind it is usually a study designed to support a wording rather than to test a product. Then read the difference between dermatologist recommended and dermatologist tested, which are not the same claim and do not require the same evidence.

The rest of the section is the machinery behind both. A claim has to be held up by a documented evidence file before it is printed, which is how a claim is substantiated; three of the words that appear most often on packs have no agreed legal definition at all, which is how natural, clean and free from claims work; and when a claim is challenged the process is public, which is what the ASA actually does.

None of that answers the question a reader is usually asking, which is whether a particular product is going to suit their own skin. No claim on a pack can answer it either, because a claim is held up by evidence about people in general rather than about you. The one test that is about you is the one you run yourself, and how to patch test a cosmetic product at home sets out how to do it, what a negative result does and does not license, and when not to test a product at all.

01

What clinically proven is allowed to mean, and what it is not

The most persuasive phrase in skincare has no fixed definition. What a clinical study in cosmetics usually is, what the advertising rules require, and the questions that separate evidence from decoration.

10 min
02

Dermatologist recommended and dermatologist tested are not the same claim

Two phrases that sound interchangeable describe entirely different things. What each one requires, what neither of them means, and how to read them at the shelf.

8 min
03

How natural, clean and free from claims work, legally

None of these three words has an agreed legal definition for cosmetics in the UK. What each one is doing, which rules do apply, and what a claim would have to say to be checkable.

9 min
04

How a claim is substantiated before it is printed

Behind every objective claim on a cosmetic pack there should be a documented evidence file. What goes into it, who signs it off, and why the weakest link is usually the wording rather than the science.

9 min
05

What the ASA actually does when a skincare claim is challenged

The UK advertising regulator works on complaint, assesses overall impression, and publishes its reasoning. What the process is, what it can and cannot do, and how to use it.

8 min

Who writes this section, and how a claim is checked

Every article in this section is written and reviewed by the Skin Insider editorial desk. There is no individual byline, and the article pages carry the editor line rather than a personal one, because the publication takes responsibility for the account as a whole rather than attributing it to a person.

The method is the one set out on the editorial standards page and it is narrow on purpose. This section works from primary and institutional sources only: the retained UK Cosmetics Regulation, the CAP code and the ASA's published rulings, MHRA guidance where a claim pushes a product towards being a medicine, and the CMA Green Claims Code where a claim is environmental. No brand, manufacturer, retailer or agency is named anywhere in the editorial, so nothing here is an assessment of any company's products or practices. Where a figure or a study cannot be pointed to, it is not asserted, and where a matter is genuinely contested the article says so instead of choosing the version that reads better. Every external link is nofollow. Errors of fact are corrected and marked at the foot of the article with what was wrong, what it now says and the date, and can be reported through the contact page.

None of this is legal advice and none of it is advice about a product. It is journalism about how a claim is allowed to be made.

This article contains no commercial links. No affiliate links, no sponsored placements and no paid mentions appear anywhere on this site. No brand, manufacturer, retailer or agency is named in our editorial, and no company that pays us can appear in it. Published independently.

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