Saponins are plant glycosides characterized by foaming in the water when mixed and stirred, which has earned them their status as natural soaps and has led some plants such as common soapwort (Saponaria officinalis) were used as soap for a long time.
What are saponins effects on human body ?
They decrease absorption of food in the digestive tract, so they have been used in slimming diets and to eliminate bronchial mucus.
When ingested in amounts greater than permitted, they are toxic, causing damage to the digestive mucosa manifested in vomiting, stomach pain, bleeding, dizziness, ulcers, etc.
Once passed into the blood, they can damage the kidneys and liver and affect the nervous system. They can even produce cardiac arrest.