John Frieda Violet Crush Purple Shampoo Formula: Creamy | Best for: Color-treated hair | Scent: Citrus notes | Recommended use: Daily | Sulfate-free ... to a true 'cool' blonde." ...

So if you wouldn’t wash your hair with Dawn, it’s probably best to find a shampoo without SLS or any other kinds of sulfates. Luckily, there are tons of sulfate-free shampoos on the market ...