Displaying 1 results of Senecionine Impurities Senecionine is a toxic alkaloid found in plants of the Senecio genus. Senecionine impurities are unwanted substances that may be present in drugs or herbal supplements made from these plants. These impurities can be harmful to human health, potentially causing liver damage or other health problems. It is important to carefully screen for and remove senecionine impurities in any products made from Senecio plants.