Hexapeptide-33

Hexapeptide-33 is a synthetic peptide—a short chain of amino acids designed to mimic peptide sequences found naturally in skin. It functions as an antioxidant and skin conditioning agent, working to protect skin from environmental stressors and support the skin's barrier function.Peptides are increasingly used in skincare because they can signal skin cells to behave in beneficial ways, or provide direct protective effects. Hexapeptide-33 falls into the protective category, helping to shield skin from oxidative damage whilst supporting the skin's ability to maintain its structural integrity.

The skin faces constant exposure to free radicals—unstable molecules generated by UV radiation, pollution, and normal cellular metabolism. These free radicals can damage skin cells and collagen, accelerating visible signs of ageing. Hexapeptide-33 works as an antioxidant, neutralising these harmful molecules before they can cause damage.Additionally, peptides like hexapeptide-33 can interact with skin cells to reinforce barrier function and support the skin's natural protective mechanisms. This helps maintain skin hydration and resilience over time.

Hexapeptide-33 is typically found in serums, moisturisers, and treatment products. It works well alongside other antioxidants and can be used daily as part of a routine. There is no evidence of tolerance development, so consistent use is recommended for any potential benefit to accumulate.

Hexapeptide-33 is generally well-tolerated with a low sensitising potential. It is unlikely to cause irritation, though as with any new ingredient, a patch test is sensible for those with very reactive skin.