CLOVES in the formula is what destroys the eggs. Other herbs also help kill the eggs, but the Cloves contain eugenol, caryophyllene, and tannins which are powerful anti-microbial properties – these components are what actually travel in the bloodstream killing microscopic parasites and all parastitic larvae and eggs. Eugonal is the most powerful antimicrobal agents known. Eugonal kills all microscopic protoza. I hope this helps!