It won't make your hair grow- its just shampoo/conditioner.
Take a good multivitamin/supplement if you want healthy hair.
Try more protein in your diet, taking biotin supplements and stop looking for a quick fix.
It actually does, a lot. You need to use it everyday for results; at least I had really impressive results with it, my hair is past the small of my back and I've used Mane and Tail since I was 16 (now 25)