Once again, kerastase is leading the pack. And most people haven't even heard of them which is so crazy!!! I use this shampoo along with their thermique conditioner and my hair feels, looks and is so much more healthy! A little bit goes a long way so don't be steered away by the price! I've found this outperforms anything I've ever tried and with how long the products last I can say they work out to be around drug store brand products. I definitely have noticed my hair getting so much healthier and being more resistant!