ASA bans Eucerin ad claiming skin looked up to five years younger

The Advertising Standards Authority has banned a poster for Eucerin skincare after ruling that its promise to make users “LOOK UP TO 5 YEARS YOUNGER” went too far. The ad, seen at Balham Underground station on 18 November 2025, also carried the words “CLINICALLY PROVEN” and a footnote saying, “Product-in-use test over 4 weeks with 160 volunteers.”

The watchdog upheld the complaint on 29 April 2026, finding that consumers were likely to read the headline as a hard claim that the Eucerin Hyaluron-Filler Epigenetic Serum had been clinically proven to improve the appearance of skin enough to create a more youthful look of up to five years younger. That distinction matters in beauty advertising, where regulators are increasingly wary of language that sounds scientific while leaning on subjective impressions rather than measured outcomes.

Beiersdorf UK Ltd said the claim was backed by a study of 160 participants who used the serum for four weeks and then self-assessed how much younger they thought they looked. The company argued that “up to” signalled a genuine maximum, not a typical result, and said the claim referred only to perceived age, which it described as inherently subjective and a standard way to assess appearance-related cosmetic claims. It also said the ad made clear how the claim was formed through the on-screen wording. Beiersdorf submitted three further studies and one peer-reviewed paper, although it said those did not directly substantiate the claim.

The ASA rejected that argument. It said objective claims needed documentary substantiation, typically including trials on people, and that the evidence provided did not meet the threshold for a statement presented as clinically proven. The regulator also noted that some of the supporting studies had been conducted in climates different from the United Kingdom, that some material was unpublished, and that the final peer-reviewed paper did not directly test the serum itself.

The ruling lands in the middle of a broader regulatory push against pseudo-scientific marketing in beauty and wellness. The Committees of Advertising Practice says claims such as “Look 5 years younger in just a month” fall into cumulative-effects territory and require very strong product-specific evidence. The case is especially significant for Eucerin, which launched the Hyaluron-Filler Epigenetic Serum in September 2024 as its first epigenetic skin-care product and promoted it as an innovation that could make people look up to five years younger.