Powered by the brand's Glycolic Gloss Complex, the L’Oreal Paris Elvive Glycolic Gloss Shampoo seeks to visibly restore the strand’s fibre from the inside to improve the appearance of hair quality. The high-performance formula gently cleanses and refreshes from root to tip, helping to transform your hair for up to 5 x washes.**, revealing a high-gloss, super sleek finish. * 82% of women agree. Consumer test on 160 women with dull hair after application of the shampoo & conditioner. ** instrumental test after one application of the trinomen & 5 applications of the shampoo.