In a review of websites promoting products that claim to remove 'mucoid rope' or plaque from consumers' intestines, Howard Hochster of New York University wrote that these websites are "abundant, quasi-scientific, and unfortunately convincing to a biologically uneducated public." He noted that although such sites are entertaining, they are disturbing in that they promote a belief that has no basis in physiology. Hochster also noted that a preparation marketed to remove mucoid plaque contains laxatives and bulky fibrous ingredients. Thus, the ropy residue expelled from people who consume this product "certainly is a result of the figs and senna in this preparation," rather than any sort of pathologic 'plaque'. Other 'colon cleanser' products contain bentonite clay that, when ingested, would also result in production of bulky stools.