What is all the fuss about keratin? All my Google results point to its protective and repairing effects. Although I cannot judge its repairing properties – as a first time user – I will express my first impressions: My hair didn’t ‘feel’ clean after shampooing. I nonetheless applied the creamy mask and left it for 2 min or so and rinsed all off. Both products have a very ‘masculine’ smell or is it the chemicals? Keratin? The smell lingers even now writing this review.