(Cassia senna)
Used as a laxative, and glycosides specific to these plants, called sennosides, have been shown to induce fluid secretion in the large intestine and vigorous contractions of the walls of the colon, making them a strong stimulant laxative. Some senna plants also produce resveratrol to protect them against bacterial or fungal attack. . The senna leaves and pods are ground to produce capsules, suppositories and tablets for laxative use, or can be taken as tea or tincture, but with chronic use can cause bowel sluggishness or diarrhoea. They should not be taken over long periods, and must be avoided in cases of bowel obstruction.
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