Hair appearance is an important issue for females. Treatment of hair with keratin has been popular among females nowadays. Although chemical hair straightening application has a beneficial effect on hair shafts with the repair of the broken cuticle, some side effects may occur. Therefore, this study aims to study the efficacy and safety of such new non-formaldehyde widely used keratin treatments on hair by assessment of changes of the scalp, hair density, and the morphology, color, and ultrastructure of hair shaft after application.
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Change of hair shedding using the Visual analogue scale (VAS)
Timeframe: Baseline, 2 months, 4 months, 6 months
Change of hair morphology using trichoscope
Timeframe: Baseline, 2 months, 4 months, 6 months
Change of hair morphology using Transmission Electron Microscopic examination
Timeframe: Baseline, 2 months, 4 months, 6 months
Safety evaluation
Timeframe: at 6 months