LICE PICTURESLice Shampoo Enzymes are proteins that cause reactions. Some enzymes are used commercially, for example, in the synthesis of antibiotics. In addition, some household products use enzymes to break down protein or fat stains on clothes. Enzymes in meat tenderizers break down proteins into smaller molecules, making the meat easier to chew. licenders has incorporated enzymes into its all natural head lice shampoo to break the skeleton of the louse. This natural formula is effective and safe to shampoo into your child's head. Positive results are guaranteed.