Works with Silk Protein and Arginine in Tricelleon, and with conditioning agents that seal the smoothed cuticle.
Hair repair · Strong evidence
Hydrolysed Keratin
INCI: Hydrolyzed Keratin
Strengthens hairSmooths cuticleReduces breakage
The protein hair is made of, broken into pieces small enough to reinforce it from within.
What it is
Hair is largely keratin. Hydrolysed keratin is keratin protein broken down into smaller peptides and amino acids so it can interact with the hair fibre rather than just coat it. Molecular size matters: smaller fragments can move toward the cortex where strength lives, while larger ones stay at the cuticle surface.
How it works
Reinforces the fibre
Smaller peptides are able to penetrate toward the cortex and temporarily reinforce weakened, porous or chemically-treated hair, improving strength and reducing breakage.
Smooths the surface
Larger fractions deposit on the cuticle, filling gaps in damaged scales so the surface is smoother, shinier and less prone to tangling.
The evidence
Hydrolysed proteins are well established for improving the strength, feel and manageability of damaged hair. The molecular-weight targeting Tricelleon uses is a recognised way to serve both cuticle and cortex.
Worth knowing
'Strengthening' only means something if the protein is sized to reach the cortex, which is why SENSCERA specifies molecular weight, not just 'keratin'.
Evidence tiers reflect the general weight of published cosmetic-science literature on this ingredient, not a claim about any individual SENSCERA product. Cosmetic products support the appearance and condition of skin and hair; they are not intended to diagnose, treat, cure or prevent any disease. Individual results vary.