l'oreal everpure sulfate-free color care system helped me. i used an inexpensive hair dye to cover my gray and my scalp burned and blistered. i immediately took some antihistamine, but the blisters were still there, i bought this shampoo and it made my scalp feel better and helped keep my skin from drying out worse. i tried a different hair color, i am highly allergic to dark colors, so i tried a red, and i still had a reaction. the only dye i can use is a blonde. l'oreal's shampoo has kept my hair from drying out.