We’ve tried and tested most, but Keratin Complex in our opinion simply lasts the longest and works the best. Since its launch in 2007, Keratin Complex has led the way with innovative technology and amazing results, it is now the leading smoothing system in the world. All Keratin Complex treatments and styling products are specially formulated to contain natural keratin protein, which rebuilds, restores and rejuvenates all types of hair. No more bad hair days, no more frizz!