I've been using Natura keratin products for a few months now and I am very impressed. Their shampoo and conditioner have made a noticeable difference in the overall health and appearance of my hair. I love that their products are free of harsh chemicals and are safe to use on colored hair. The only downside is that they can be a bit expensive, but I believe they are worth the investment. I highly recommend Natura keratin for anyone looking to improve the condition of their hair.