Helminthic therapy is a type of immunotherapy and is currently being studied and also available as a treatment for crohn's disease.
It is good to take high fiber diet such as whole grains, oat bran, unpolished rice, bananas, fruits and vegetables with skin which aids the digestive system only if digestive system accepts it. Fish oil as it contain omega-3 fatty acid has been proved as an effective medicine for this condition and is also great for the health of the intestines.
Drinking plenty of liquids is another way to keep body hydrated and help flush out the toxins.
Relaxation techniques such as meditation and yoga will also help.