Product Information Charcoal with Citrus Oil Shampoo by Hask Brand claims This shampoo contains charcoal, derived from coconut shells, combined with citrus oil. It conditions and locks in moisture, while helping to absorb impurities, leaving hair silky, frizz-free and ready for styling. Free of sulfates, parabens, phthalates, gluten, drying alcohol and artificial colors. Gentle enough for daily use and safe for color-treated …