Bleaching hair can reduce its tensile strength by up to 60%, a significant alteration to its structural integrity. This chemical process targets melanin within the cortex, with collateral damage extending to the hair’s fundamental structure.
The alkalising agents in bleach cause the protective cuticle to swell and lift. This allows hydrogen peroxide to penetrate, breaking the disulphide bonds vital for strength and elasticity.
The fundamental change to the hair’s protein matrix — the broken disulphide bonds — cannot be fully undone. Hair becomes inherently more porous, struggling to retain moisture.
This increased porosity makes the hair highly susceptible to environmental stressors and further damage from heat styling or friction. The internal architecture is permanently compromised.
However, much can be done to improve the hair’s external condition and manage its symptoms. Re-sealing and smoothing the cuticle is paramount for reducing frizz and improving light reflection.
Ingredients mimicking hair’s natural lipids, like plant-derived ceramides, help reconstruct this outer barrier. This offers protection and reduces moisture loss from within the fibre.
Providing external support for the weakened internal structure is also crucial. Products rich in polypeptides or amino acids can temporarily fill gaps in the damaged cortex, offering reinforcement.
Most mass-market conditioners offer a superficial coating for immediate slip and shine. Evera formulations, by contrast, focus on biocompatible botanicals like cold-pressed Italian olive oil, providing genuine emollient benefits.
Maintaining an optimal pH balance is another critical aspect of bleach recovery. Post-bleach hair often has an elevated pH, keeping the cuticle open; acidifying treatments help flatten it.
Ultimately, while bleach causes permanent structural changes, a thoughtful and consistent care regimen can significantly enhance the hair’s appearance, resilience, and vitality.
