What harmful substances can potentially be found in tea?
In its investigation titled "Tea and herbal tea: too many contaminants" published in March 2022, the consumer association 60 Millions de Consommateurs raised concerns among tea drinkers. Laboratory analyses identified 16 problematic substances across 48 conventional tea and herbal tea bag brands. In black teas, green teas, and verbena infusions, half the samples showed traces of acetamiprid, chlorfenapyr, and glyphosate.
Furthermore, 60 Millions de Consommateurs discovered various foreign particles in tea bags, though not hazardous to health. Insects and rodent hairs were primarily found in organic herbal tea samples. In verbena infusions, tests also detected plastic and mineral fragments.
Green tea: the most criticised variety
After harvesting, green tea leaves are exposed to heat to stop oxidation. This production process preserves their flavour qualities and makes green tea one of the most popular teas in the world.
The analysis of several tea bag brands revealed the presence of numerous pollutants: biocides, herbicides, mineral oils, pesticides, and more. According to findings from 60 Millions de Consommateurs, the most affected products were mint-flavoured green teas. Five out of twelve samples tested were found to contain residues of four unauthorised substances.
Black tea and herbal teas: less contaminated varieties
Unlike green tea, black tea is air-dried after harvesting. It undergoes natural oxidation or fermentation, giving it its deep colour and distinct flavour. According to the investigation by 60 Millions de Consommateurs, black teas, as well as herbal teas, contained fewer pesticides than green teas.
Only traces of one banned pesticide were found across three black tea bag brands. The main concern, however, centres on glyphosate: over 11 out of 16 tested brands contained residues of this toxic herbicide.
How to enjoy pollutant-free tea?
In conclusion to this study, the findings from 60 Millions de Consommateurs highlight that only organic teas provide the certainty of containing no toxic substances. To ensure you protect both the environment and your health, choosing loose-leaf or bagged organic tea is the way forward.
In our tea and herbal infusion range, Kusmi guarantees a diverse selection of organic blends to enjoy throughout the year. For an indulgent festive season that cares for your well-being, treat yourself to Glögg, our organic festive herbal tea with hibiscus and spices. Or perhaps you'll fall for Tsarevna, our comforting organic festive black tea with spices…