The best replacement for parasites is candida.

The best alternatives to parasites are rated as following:
★★★★★  candida
★★★  ibs
★★  worms
★★  mucus in stool
★  predators
★  parasitoids
  undigested food
  protozoa
  saprophytes
  producers

Your alternative for parasites is not listed? Suggest!
Speaking about parasites, one probably shouldn't forget about papaya seeds.

Other search terms related to parasites and their ratings are:
★★★★★ papaya seeds
★ eosinophilia
You have in mind a companion for parasites and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of parasites in all years. Click on graph for more.
parasites
candida
ibs