what layer of the hair strand does this treatment affect?Updated 9 months ago

the glyoxylic acid will penetrate through the hair cuticle + undergo chemical reactions that restructure the keratin protein in the cortex (inner layer). when heat is applied to the hair, the glyoxylic acid creates a hydrophobic barrier on the surface—think of it like a raincoat for your strands—temporarily blocking humidity for the smoothest results.