... %1,8-Dihydroxyanthraquinones, present in laxatives, fungi imperfecti, Chinese herbs and possibly vegetables, are in debate as human carcinogens. ... variety of vegetables (cabbage lettuce, beans, peas), some herbs and herbal-flavoured liquors for their content of the ' ... beans, respectively. Physcion predominated in all vegetables. In the herbs grape vine leaves, couch grass root and plantain herb, ...