April 2025 in “Pharmaceuticals” APA is a promising new compound for repairing damaged hair, outperforming Olaplex® in strength and elasticity.
August 2024 in “Cosmetics” K18® and Olaplex® both effectively repair bleached hair, improving its strength, smoothness, and overall health.
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September 2020 in “International Journal of Cosmetic Science” Different sizes of keratin peptides can strengthen hair, with smaller ones possibly increasing volume and larger ones repairing damage.
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January 2017 in “Clinical approaches and procedures in cosmetic dermatology” Hair can't be reliably repaired once damaged; prevention and proper product use are key to maintaining hair health.
Using enzymes to link proteins makes hair repair treatments more effective and long-lasting.