Shiny hair is healthy-looking hair because its smooth surface perfectly reflects light. Hair damage disrupts cuticles, making fibres rough, porous, and dull unable to reflect light.Glycolic Gloss Conditioner is powered with [Glycolic Acid] which has a small molecular weight able to penetrate the hair & inject it with care. The Glycolic Gloss Complex contains conditioning agents to seal cuticles with a lasting shine glaze. Hair is shinier & smoother than ever beforeHow to use?After using the Glycolic Gloss Shampoo, apply from lengths to tips. Leave on for three minutes, then rinse. For maximum shine, follow with the Glycolic Gloss Rinse-Off 5 Minute Lamination Treatment and Leave-In Serum.