Arata's '87% more healthy scalp bacteria' ad fell to a 24-hour lab soak

Slick Organics' Instagram advertisement for Arata Damage Defence Super Shampoo claimed '01 Wash to Balance Scalp Microbiome' and '87% Increase in Healthy Scalp Bacteria', alongside 'With 1% N-DurHance™'. When a consumer organization's complaint reached ASCI, the advertiser responded with substantiation instead of going quiet: an independent in-vitro study by a contract research organisation, a keratin study, a technical brochure, and later a revised study report with a correction letter from the testing agency.

The Consumer Complaints Council was not persuaded. The study measured bacterial growth after 8- and 24-hour incubation periods, while the shampoo's typical scalp contact time is approximately 2–5 minutes. The protocol also referred to the Arata Damage Defence Super Serum while the claim was for the shampoo, a discrepancy the advertiser attributed to a typographical error.

To defend the persistence of its effect, the advertiser cited literature on Piroctone Olamine remaining on the scalp after rinsing — without submitting evidence that the ingredient is present in the product at working levels. The '87% increase' turned out to be the tabulated 24-hour growth result for a single bacterium, S. epidermidis, in vitro. On September 8, 2026, the CCC upheld the two microbiome claims as contravening Chapter I of the ASCI Code, while finding the 'With 1% N-DurHance™' composition claim not in contravention.

Both microbiome claims upheld as contravening Chapter I of the ASCI Code and ordered withdrawn or modified; no fine, as ASCI is self-regulation.

The study's exposure window was 8–24 hours; a shampoo's scalp contact is roughly 2–5 minutes.

The protocol named the serum while the claim was for the shampoo — a discrepancy the advertiser had to walk back.

The defence leaned on an ingredient staying on the scalp without proof it is in the product at working levels.

'87% increase' came from one bacterium's tabulated 24-hour growth, not a clinical outcome.

A lab result can be true and still make a false ad: an 8–24 hour incubation proves nothing about a product that touches skin for two minutes.

ASCI told the advertiser to withdraw or modify the claims. The case shows a advertiser that engaged fully with the process — telecon, expert review, revised studies — and still lost on the mismatch between laboratory conditions and real use.