Kidney Beans Uncooked May Induce Gastrointestinal Dysfunction

Kidney bean is popular food, with kidney shape, strong flavor and color in reddish-brown in nature used often as an excellent dietary selection because of enormous health benefits with a good source of protein and minerals.

Raw or undercooked kidney beans (Phaseolus vulgaris L.) may cause chronic indigestion inducing functional permutation in various gastrointestinal tissues, a study by renowned institutes suggested.

In 20 young male rats randomly divided into two groups of 10 rats, the first group served as the control and gavaged with 300 mg of a rodent pellet flour suspension (RPFS)and the second experimental group challenged with 300 mg of a Beldia bean flour suspension (BBFS) for 10 days, group fed with white kidney bead suspension demonstrated intestinal alterations characterized by abnormal of shaggy hair. tiny hairlike folds in the plasma membrane that extend from the surface of many absorptive or secretory cells with short and dense or long and slender features.



Dr. Nciri N the lead author also found that group fed with 300 mg of a Beldia bean flour suspension (BBFS) also experience the distorted function of the jejunum and disturbed hydroelectrolytic balancing.

Also in the same study groups, oral intake of beldia bean flour suspension (BBFS) group exhibited increased levels of phytohemagglutinins (PHAs), a toxic protein found in extracted from the kidney bean in interaction with a mucous membrane in the small intestine.

The presence of immunogenic intraluminal PHAs was found within 3-4 h after the oral intake of the BBFS.



The interaction of the toxic compound with a mucous membrane in the small intestine may be potentially resulting in an inflammatory response, inducing digestive dysfunction.



Dr. Torres-Pinedo R. not the researcher in the above study said, "Lectins( found abundantly in kidney bean) are contained in significant amounts in a great variety of products ingested in the human diet. This and the demonstration of their harmful effects on the intestinal epithelium in rodents indicates a need for investigation of potential adverse actions of lectins on human intestine".

Truly, there is no doubt that raw and under-cooked kidney bean can contain certain toxic chemical compounds, which interfere with the digestive function, causing chronic digestion and in some cases serve intoxication.



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Sources
(1) Effect of White Kidney Beans (Phaseolus vulgaris L. var. Beldia) on Small Intestine Morphology and Function in Wistar Rats BY Nciri N1,2,3, Cho N3, Bergaoui N1, El Mhamdi F1, Ben Ammar A4, Trabelsi N5, Zekri S1, Guémira F5, Ben Mansour A1, Sassi FH1, Ben Aissa-Fennira F1.(PubMed)
(2) Identification and Characterization of Phytohemagglutinins from White Kidney Beans (Phaseolus vulgaris L., var. Beldia) in the Rat Small Intestine by Nciri N1,2,3, Cho N3, El Mhamdi F1, Ben Mansour A1, Haj Sassi F1, Ben Aissa-Fennira F1.(PubMed)
(4) Lectins and the intestine by Torres-Pinedo R.(PubMed)