How about trying a sulfate-free shampoo? These are less drying/damaging to the hair shaft, especially if made of mostly natural ingredients. There are several options these days, but try each until you find one that works best for your hair. To keep your hair moisturized and healthy-looking between shampoos, you could try a serum which contains natural oils like argan or olive oil or even coconut oil. Make sure you apply it all the way through to the ends, since our ends tend to dry out pretty quickly, especially if you wear your hair out all day and are in a very drying environment. Warning though: natural hair products are generally more expensive. But for me, they are worth it.