Scientific journals describe Graptophyllum pictum (caricature plant) as being effective in stimulating peristalsis, the natural intestinal clearing movement.

Aloe vera, Foeniculum vulgare (fennel), Curcuma longa (turmeric) and Rheum officinale (Tibetan rhubarb) have been studied for promoting regular bowel movements and assisting in maintaining intestinal lining integrity in cases of intestinal inflammation and infection.