Humaworm herbs are solids and so are the capsules themselves which all have to be processed by the system working at odds with the MCs main working mode of giving the digestive system a rest.
Then you have the issue of parasite die-off possibly releasing more toxins than the body is able to process and expel thus there is a high possibility of getting quite ill from toxin overload. We have at least one recorded case on this forum of someone nearly passing out from toxin overload cause they tried doing a parasite cleanse with the MC.