Displaying 1 results of Heliotrine Impurities Heliotrine is a toxic alkaloid found in certain plants, such as ragwort and groundsel. However, the presence of impurities in heliotrine can increase its toxicity levels, making it even more dangerous. These impurities may come from the plant itself, or from contamination during processing. Therefore, it is important to ensure the purity of heliotrine before use in any application.