There are good bacteria that keep the bad bacteria in check. In fact, candida is a yeast that is in everybody and it normally does no harm. It is only when the bacteria and yeast levels are out of balance that illness occurs. HUMAWORM wipes the slate clean - afterwards, your body will be able to maintain the correct levels of bacteria and yeasts. The body will replenish its good bacteria from the food you eat although some folks choose to take probiotics to speed up the process.
Visible parasites, on the other hand, have no place in the human body - they cause much harm and sickness. They need to be removed immediately.