Many lice shampoos on the market rely on pesticides to kill the bug. This isn't good because you don't want to put strong, harsh chemicals on your child's scalp. Also, the lice have developed a resistance to these products and are often ineffective. Our lice shampoo is made with enzymes which break the shell of the louse and make it much easier to comb them out. Our lice shampoo works 100% of the time.