LOréal Professionnel Expert Series Vitamin Color Spectrum Professional shampoo that styles the 5 dimensions of the color spectrum: shine, saturation, contrast, tone, brightness Ferulic acid + citric acid Colored hair 300ml Vitamino Color Spectrum Shampoo is formulated with ferulic acid and citric acid. The routine helps maintain colorants within the fiber for up to 100 days* of vivid color from day one. The result on the 5 color dimensions**: 1. Shine: Ultra Intense shine. 2. Saturation: Rich and vibrant color. 3. Contrast: optimal depth between different shades. 4. Tone: neutralization of unwanted reflections. 5. Brightness: The level of brightness or darkness is well preserved. The shampoo formula has a luxurious creamy texture that transforms into a dense foam once applied. Deeply cleans the fiber for immediately nourished and stronger hair. Hair is immediately nourished and +96% stronger.*** *Instrumental test after using the Vitamino Color Spectrum routine. **Instrumental test with the complete Vitamino Color Spectrum routine after 4 weeks. ***Instrumental test after applying the Color Spectrum Vitamino Shampoo.