What is the purpose of a deep conditioning treatment?

The purpose of a deep conditioning treatment is to repair and moisturize damaged hair. Deep conditioners are formulated with concentrated ingredients that penetrate the hair shaft, providing intense hydration and nourishment that regular conditioners may not offer. This treatment is especially beneficial for hair that has been subjected to chemical processing, heat styling, or environmental stressors, as these factors can leave hair dry, brittle, and prone to breakage. By using a deep conditioning treatment, the hair cuticle is lifted, allowing healing ingredients to penetrate deeply, effectively restoring moisture balance, elasticity, and overall hair health.

The other options do not accurately capture the primary function of a deep conditioning treatment. Enhancing volume typically pertains to styling products that create lift and body, while adding color relates to hair dye or color products. Keeping hair straight involves smoothing treatments or styling techniques rather than hydrating or repairing damage.