Are you saying that Senna left to lose weight? Because senna contains anthraquinones, it can stimulate intestinal mucosa and play a laxative role after taking it. On the surface, it has the effect of losing weight. It is also because Senna leaves contain excessive anthraquinone, so the side effects are very serious, which will cause pathological changes of intestinal mucosa. Clinically, it is called melanosis coli, which is currently considered as a precancerous lesion and can cause colon cancer!