Doctor Recommended! Lice Knowing You© Lice Removal Knock-Out Mousse is ezyme based and clinically proven to help loosen and dissolve nit glue. For the ultimate in lice removal, use with the Lice Knowing You© Lice Removal Knock-Out Serum and Knock-Out Lice Comb to safely and effectively remove head lice like the professionals. Pick a fight with lice...and win! *FDA Registered