It started when I was living in hostel, one of my friend brought Tresemme Keratin smooth shampoo. I borrowed a little from him when I was not having my shampoo. And really I found it way better than other shampoos. This shampoo really makes hair grow thicker and smoother. It is really easy to apply and the ingridients used are even mentioned on the container. I really found this product very useful. This product is a little costly as compared to other shampoo. But it really works good. Full satisfaction product. The fragrance and smell of this shampoo is really fresh and good. There is no negative effect. I would suggest everyone to try this product. Thank you.