Galloyl Pentapeptide-33

Galloyl pentapeptide-33 is a synthetic peptide compound derived from natural sources, particularly from plants like Paeonia lactiflora (peony root). It functions as both an antioxidant and skin-protecting agent within skincare formulations.This ingredient works at a cellular level to support the skin's natural barrier and defence mechanisms. Its structure allows it to interact with skin cells in ways that may enhance protective processes, making it a popular addition to serums and treatments focused on skin resilience.

Galloyl pentapeptide-33 appears to work through multiple pathways. It acts as a free radical scavenger, meaning it can neutralise reactive oxygen and nitrogen species that damage skin cells. This reduces oxidative stress at a cellular level.Beyond antioxidant activity, the ingredient may influence cell signalling pathways—specifically NF-κB and MAPK pathways—which are involved in inflammation and skin barrier regulation. By modulating these pathways, it may support the skin's natural ability to express barrier-protective genes and maintain structural integrity.

Galloyl pentapeptide-33 is typically found in serums and targeted treatments rather than cleansers or rinse-off products, allowing for longer contact time with skin. It can generally be layered with other actives, though as with any new ingredient, introduce it gradually and observe how your skin responds. Apply to clean skin before heavier creams to maximise penetration.

This ingredient is generally well-tolerated in skincare formulations. As with any peptide or plant-derived compound, those with known sensitivities to peony or similar botanical extracts should patch-test first.