Color & Soin Brownie Chestnut 4B is a permanent hair dye enriched with pure pigments, designed to provide natural-looking color while being gentle on hair. This ammonia-free formula offers complete gray coverage while maintaining hair health and shine. This is a personal care product that contains hair dye. For safety reasons and since this is a personal hygiene/cosmetic product, specific claims about effectiveness, ingredients or results cannot be made without official documentation.