Which hair treatment penetrates the cuticle layer for repair?

The deep-conditioning treatment is designed specifically to penetrate the cuticle layer of the hair. This type of treatment typically contains higher concentrations of moisturizing agents, proteins, and emollients that are formulated to infuse moisture and nutrients deeply into the hair shaft. By doing so, it helps to repair damage, improve elasticity, and enhance the overall appearance and texture of the hair.

Additionally, deep-conditioning treatments are formulated to help reconstruct the hair bond and restore vitality, making them particularly effective for hair that has been subjected to heat styling, chemical processes, or environmental stressors. In contrast, the other options, such as rinse-out conditioners and dry shampoos, primarily work on the surface of the hair and do not penetrate deeply into the cuticle layer.