The £399 LED Face Mask Question: What Red Light Actually Does to Skin in 2026, and the 4 Groups Who Should Keep Their Money
Editor’s note: this piece has been folded into our fuller guide, Do LED face masks work? Four banned ads, zero registered devices and the £300 question, which now carries everything from this article – the 2014 collagen trial every brand quotes, the dose problem with cheap masks, the “FDA cleared” explainer, the four groups who should keep their money and the twelve-week rule. Please read and bookmark that version; it’s the one we keep updated.
