Phenyl T-Butylnitrone

Phenyl T-Butylnitrone (PBN) is a synthetic antioxidant compound belonging to the nitrone family. It is not derived from plants or natural sources, but rather created through chemical synthesis for use in skincare formulations.In topical products, this ingredient works by seeking out and neutralising free radicals—unstable molecules that can damage skin cells and accelerate visible signs of ageing. By intercepting these harmful molecules before they cause cellular damage, antioxidants like PBN aim to support skin resilience and protect against oxidative stress.

Phenyl T-Butylnitrone functions as a free radical scavenger. When free radicals form in the skin—whether from sun exposure, pollution, or metabolic processes—they become chemically unstable and can trigger a cascade of damage to proteins, fats and DNA within skin cells.This ingredient donates electrons to these unstable molecules, stabilising them and preventing them from damaging healthy tissue. In doing so, PBN itself becomes inactivated, completing its protective cycle.

Phenyl T-Butylnitrone is typically found in serums, moisturisers and treatments designed to support skin defence. It is generally best used as part of a broader antioxidant strategy alongside other protective ingredients such as vitamin C or vitamin E, and alongside daily broad-spectrum sunscreen for comprehensive protection against oxidative damage.

Phenyl T-Butylnitrone is generally considered well-tolerated in topical skincare formulations. No major safety concerns are widely documented, though those with highly sensitive skin should patch test first.