With the Paranix products, remove 100% of lice! The Paranix anti-lice treatments provide a double mechanic action to fight lice and nits. Paranix Spray and Paranix Shampoo suffocate and dehydrate lice and nits, and Paranix Sensitive fixes on their respiratory tracks to suffocate them and penetrates inside of nits to stop their development. The Paranix anti-lice products contain no chemical substances. These ones only act in a mechanical way. As a consequence of it, lice can not develop a resistance face to used ingredients.