HUMAWORM'S ingredients are formulated to attack parasites from every direction; blood, organs, and digestive system. The chemical componants in the herbs used also work in different ways to remove worms; some kill, some stun and others repel. They will try to move away from the "poison" - the poisons come into the stomach, therefore they will try to move downward. When they get to the intestines and the colon, other herbs are working to get them eliminated as quickly as possible.
The larvae are much smaller so they are able to move around easier. They will try to get somewhere to escape, but with HUMAWORM there's nowhere for them to hide. You might feel a poking sensation during the cleanse as the parasites are being disturbed and removed, but don't worry, they won't come out of your mouth or your skin. I hope this helps!