Hi, I wash my hair at least four times a week. And I want to use such products that are safe and do not harm if used excessively. I am thinking to use Kerastase resistance shampoo and conditioner. I am thinking of buying it because my hair is damaged and I donât even straighten them or color them, and it is quite frustrating. It must be in my genes that I have a dry hair. I have heard that this product work from the inside through and is really effective. But Can I use it as my main shampoo or conditioner? Or is it too strong? Is it okay to use Kerastase resistance shampoo or conditioner all the time? Please advice. Thanks.