The thing with that parasite cleanse is the castor bean. That is a potent purgative that causes cramping in some people. There may be only a small amount in there, but still some people are sensitive to it. I wish the parasite cleanses would leave out senna, buckthorn, and castor bean. If someone wants, they can take these on their own. Humaworm has buckthorn and senna. Humaworm might make up a special batch without them if you request it. I guess they feel that including laxatives in the mix may make it easier to pass larger parasites. Even if there are small amounts of these laxatives, they may not make people rush to the bathroom, but might cause annoying cramping in some people. I don't tolerate these laxatives too well due to cramping, so I take extra licorice root tea when I need a little help.