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 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. Features Damage & heat protection Up to 82% more shine Up to 54% more smooth Up to 75% less frizz Preparation and Usage How to use: Use as a finishing touch in the Glycolic Gloss routine for ultimate shine, intense smoothness and damage protection. Rub two drops between the palms of your hands. Apply evenly through the lengths and ends of wet or dry hair. Apply a generous amount on damp or dry hair, to seal it with a shine glaze from lengths to tips. Leave on for 5 minutes and then rinse thoroughly. For optimal results, use the Glycolic Gloss Shampoo, Conditioner, and follow with the Glycolic Gloss Rinse-Off 5 Minute Lamination Treatment and Leave-In Serum