Ginger, by supporting the digestive system, can help to kill parasites in the stomach before they pass on to the intestine. Once parasites have invaded the intestine, anti-parasitic herbs are needed, along with a careful diet, to rid the body of parasites.
Ginger and cinnamon caused reduction of fecal cyst and trophozoites counts. Histopathology, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) after exposure to each extract revealed evident improvement of intestinal mucosal damage produced by G. lamblia infection and direct structural injury to the trophozoites. However, these results were more obvious after exposure to cinnamon extracts.
Cinnamon extracts in this study especially in a dose of 20 mg/kg/day were more effective than ginger not only in decreasing fecal cyst count but also in improving the histopathological and electron microscopic changes of intestinal mucosa.