Original Study: Damage and Regeneration of Hair Cuticles Due to Hair Dye: Morphological Changes Over Time
January 1996
in “
대한피부과학회지
”
Studysummary This study found that permanent dye application causes initial swelling and subsequent degradation of the hair cuticle, with recovery taking more than 8 weeks to approach pre-treatment conditions.
Our plain-language summary. Not medical advice or a treatment recommendation. Consult a qualified healthcare professional before changing treatment. Full disclaimer
The study investigated the morphological changes in hair cuticles after applying permanent dye, using scanning electron microscopy. Initially, cuticular swelling was observed after 30 minutes, followed by degradation starting at 90 minutes. Extensive cuticular detachment and cortical exposure were noted by 1 week, with damage peaking between 1 and 2 weeks. Although cuticles began regenerating, damage persisted after 6 weeks, with full regeneration by 8 weeks. The study concluded that hair coloring intervals should exceed 8 weeks to allow for cuticle recovery, and further research was needed to enhance cuticle protection and regeneration.
