Clinically Proven? Prove It.

The phrase "clinically proven" is one of the most powerful claims in a beauty marketer's 'Arsenal'*. It sounds scientific, authoritative, and reassuring. But in a ruling published in April 2026, the Advertising Standards Authority made clear that brands invoking those words must back them up with robust evidence. Claims which are capable of objective substantiation must be substantiated with objective, not subjective evidence. Two further rulings published in April and May 2026 indicate a consistent approach by the ASA.

In the health and beauty sector 'robust evidence' means experimental human studies, i.e. 'clinical trials'. These are the gold standard for objective substantiation. They comprise rigorously controlled trials in humans where an intervention group uses the product, and a control group uses a placebo. They are typically double-blind, where neither the subjects nor the researchers know who is in which group, minimizing bias. In recent years, however, we've seen a trend