LICE NITSHead lice in hair can be treated with shampoo. Many head lice shampoo's rely on pesticides to kill the bug. A pesticide is a chemical used to destroy pests. Most pesticides contain chemicals that can be harmful to people, animals, and the environment. For this reason the government regulates pesticides in the United States to protect public health and the environment. You don't want to use lice medications with pesticides on your child's head to kill lice. You don't have to. Licenders all natural head lice shampoo uses enzymes to kill lice. Be safe, be smart, call on Licenders to help you get rid of lice naturally, without using dangerous pesticides.