A professional, smoothing shampoo that gently cleanses and tames hair strands, making them extra soft and shiny. Thanks to innovative technology, it prepares hair for further care, providing a smoothing effect and controlling frizz. Discover a new era of hair taming with Keratin Alpha Sleek professional smoothing shampoo. Its formula is designed to gently but effectively cleanse hair, taking care of its condition already at the washing stage. Thanks to innovative technology, the shampoo actively cares for the hair fiber, giving it shine and exceptional smoothness. The results are visible after the first use - hair is 76% more voluminous¹ and 67% softer¹. Used together with other products in the range, it provides 2 weeks of lasting smoothness and control over frizz². ¹ Instrumental test after using the shampoo. ² Instrumental test after using a routine consisting of Keratin Alpha Sleek shampoo, conditioner and serum 4 times.