The concentrated spectrum serum with the professional vitamin spectrum L'Oréal is enriched with 5% alpha-silane. It provides instant results and sustainable results for up to 10 washes*. Formulated without water, alpha-situne is an active care ingredient that creates a protective layer on the surface of the hair fiber when activated by heat. Result: - Protection of hair from UV damage. - Anti-frizz effect for up to 72 hours ** - anti-humidity (up to 80% humidity in the air **). - Heat protection up to 230C **. Hair is immediately more hydrated, smooth, shiny, and softer with a lasting result of up to 10 shampoos*. Preserves the intense color from day 1 for up to 100 days. *** The result on the 5 dimensions of color ****: 1. Brilliance: una ultra-intense shine. 2. Saturation: a rich and vibrant color. 3. Contrast: una optimal depth between the diverse shades. 4. Tone: unwanted reflections are neutralized. 5. Brightness: the level of clarity or darkness is well preserved.*On more hair attributes, instrumental tests. ** Instrumental tests. *** Instrumental test after using the Vitamino Spectrum Vitamino routine. **** Instrumental test with the complete vitamino color spectrum routine after 4 weeks.