yes. any dark leafy green vegetable can cause loose stools especially in large quantities. be carefull to wash your greens by swishing them in mildly soapy water or vege wash then rinse as chemicals sprayed on these crops can cause the same problem
can lettuce cause me to have diarrhea? . we think lettuce is causing diarrhea. we don't know what else it could be. every week for about a month now if i eat lettuce or my boyfriend eats it it causes diarrhea and stomach pain. one time it has even caused us to have stomach flu symptoms.