The reason undigested food comes out when doing anti-parasitic herbal cleanses is because those herbs are toxic and the body wants to flush those herbs out as fast as it can and that thereby flushes out food that hasn't been totally digested and lots of people on here mistaken that undigested food for worms, flukes, eggs, or other types of parasites.
A lot of people comment they only see their flukes or parasites when doing herbal cleanses. Well that's because only during herbal cleanses does that cause undigested food to flush out.
Most of the parasite cases here are mistaken identity in my opinion. That's why all their parasite tests come back negative even though the alleged parasites are big enough for them to see in the toilet with their own eyes amongst all the other muck in the toilet.
The companies who makes these herbal cleanses are laughing all the way to the bank.