Senna contains glycosides, which are a group of organic compounds that are commonly found in plants. These compounds work as a laxative by smoothing the muscles as digested food moves through the intestines. This helps to enhance the stool volume and move it out of the colon. The process is caused by the chain of fatty acids that promote digestion, fermentation, and successfully converting the glycosides into a purgative agent.
The pods are more potent than the leaves and once drank as a tea they will start to purge the system after 6 hours. I have a great story I tell my students about this!
They are best taken with calming herbs such as dill, fennel or chamomile as gripping sensations can occur by themselves. They like to have companions.
We use this also in our Dieter Tea. https://driedherbsonline.com/product/d-tea/