If you know anyone whose traveled to remote villages/areas of the globe then you'd encounter some disagreement. A dear friend spent who two years in India required severe purging of parasites from her system. You don't even have to travel that far, ask anyone whose suffered from food poisoning or Montezuma's revenge.
My cleansing process is yielding positive results. I am very happy with Humaworm and am looking forward to using the rest of their product line. This type of maintenance has been around for centuries through the use of herbal remedies and fasting.