LOreal Paris Elvive Glycolic Gloss Shampoo 200mlWhat makes it effective?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 Sulphate-Free Shampoo 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 before.Suitable for all:Effective on all hair types, ranging from straight, wavy, curly, and coily.*Consumer Use Test, women with dull hair, shampoo + conditioner. 78% of 160 UK women agreed** instrumental test after one application of the trinomen & 5 applications of the shampoo.*** instrumental test after application of the shampoo + conditioner.**** instrumental test after use of the shampoo