Impact of acid ( & #8221;progressive brush & #8221;) and alkaline straightening on the hair fiber: Differential effects on the cuticle and cortex properties

Conclusion: The treatment with glyoxylic acid showed rupture tensile statistically equivalent to the alkaline straighteners. The mechanism of action of glyoxylic acid does not appear to be based on breaking and rearrangement of disulfide bridges, but altered them, that influenced the hair strength. However, it is also essential to consider other factors relevant: technical application technique, reaction time, and interval of reapplication of the product, as this can change the pattern of the results obtained.
Source: International Journal of Trichology - Category: Dermatology Authors: Source Type: research