The efficacy was rated "unconvincing" for all teas. Each product was tested in the laboratory for pesticide residues and pyrrolizidine alkaloids (PA). PAs are plant poisons that are created by weeds to deter predators and are sometimes collected during harvest. If consumed excessively, it damages the liver and discusses carcinogenic and mutagenic effects. The winner of the test primarily manages a rating of "sufficient" and comes from a drugstore.
Bad Heilbrunner cough and bronchial tea is available in drugstores and includes lime, anise and thyme flowers. The result of the pollutant test is good, pesticides were only found in traces. A cup costs 0.16 euros. In second place is Bombastus tea. Contains risotto, licorice root, bitter fennel and thyme. Pesticides could also be detected in this tea mixture. In addition, polyvinyl chloride (PVC) and chlorinated compounds were found in the bags. A cup costs 0.20 euros. Anchor tea contains thyme, swamp root, fish leaves, licorice root and Iceland moss. The mixture contained traces of six different pesticides. With € 0.45 per cup, it is the most expensive product to test. Heumann tea is the only granulate tested and the only pesticide-free product.
Three teas received the “bad” judgment, the offers from Aurica (€ 0.15 per cup), DocMorris (€ 0.07 per cup) and Müller (€ 0.05 per cup). The lab found increased residues of pesticides and PVC compounds in DocMorris and Müller tea bags. Müller's tea also contained traces of diethyltoluamide (DEET). Too high levels of PA were found in Aurica's loose tea mixture.