A naturopath in Western Australia informed me she had successfully used wheatgrass extract to treat seven patients with Crohn's disease, a chronic condition that causes damage to the intestines. She was also using it to treat common complications of the disease, for example anal fissures and fistulas, and that they all "healed over".
Taking half a teaspoonful (or half a capful) of wheatgrass Supershots just twice weekly - say Mondays and Thursdays, and holding the liquid in the mouth for half a minute before swallowing, can help treat this condition and ease pain.
Considering no pharmaceuticals exist that can achieve such results, the extract is worth trying.