Saudi Food and Drug Authority warned of using eight types of shampoo contaminated with carcinogenic Dioxane substance. In a statement issued here today, the Authority said it has been proved that some types of shampoo, especially for children, are contaminated with Dioxane substance which might cause cancer. It said that the Authority addressed the concerned bodies to take the necessary statutory procedures on withdrawing such products from the market and stopping their customs clearance and entry into the Kingdom.