Aminolevulinoyl Sh-Pentapeptide-19

Aminolevulinoyl Sh-Pentapeptide-19 is a synthetic peptide—a short chain of amino acids—engineered to function as an antioxidant and skin protectant. Peptides are recognised in skincare for their ability to signal to skin cells and support structural integrity, whilst antioxidants work by neutralising free radicals that accumulate from sun exposure, pollution, and natural metabolic processes.

This ingredient is designed to address the oxidative stress that contributes to visible skin ageing. By offering antioxidant protection, it aims to support the skin's natural defence systems and help maintain skin barrier function.

As an antioxidant peptide, this ingredient works by donating electrons to neutralise free radicals—unstable molecules that damage skin cells and accelerate visible ageing. Free radicals accumulate from external sources like sun exposure and pollution, as well as from normal cellular metabolism. By reducing this oxidative burden, the ingredient helps protect skin proteins, including collagen, from degradation.

The peptide structure may also allow it to interact with skin cells in ways that signal protective and reparative responses, supporting the skin's own defence mechanisms and barrier function.

This ingredient is typically found in serums, moisturisers, and protective day creams. Use it as part of your regular skincare routine, ideally morning and evening. For best results, layer it with other antioxidants or use it alongside a broad-spectrum sunscreen, which provides the most effective defence against the environmental stressors this ingredient addresses.