From the number one pediatrician-recommended lice removal brand.* Nix Ultra Lice Treatment Hair Solution kills head lice and eggs (nits), including hard-to-kill superlice. Superlice are the dominant species of head lice and are resistant to traditional pesticide lice treatments. Nix Ultra treatments are pesticide-free and non-toxic. They work by killing lice and superlice through suffocation rather than using harsh chemicals First, apply Nix Ultra Hair Solution to hair. Next, wash out with regular shampoo. Then, remove lice and eggs (nits) from head hair with the included Nix Ultra Lice Removal Comb. Nix lice treatment is trusted by parents and feared by lice. Nix offers a variety of lice combs, shampoos, treatment kits, hair prevention spray and lice spray for furniture and bedding to nix out lice in your home. *Based on Pediatrician Survey December 6, 2022.