https://www.oekotest.de/gesundheit-medi ... 897_1.html
https://europepmc.org/article/MED/31552738
Hab den Hinweis in einem outdoor Forum gefunden, Studie in Englisch, vollständig, bebildert
:"Teabag-derived micro/nanoplastics (true-to-life MNPLs) as a surrogate for real-life exposure scenarios", Chemosphere, Volume 368, November 2024
https://doi.org/10.1016/j.chemosphere.2024.143736 bzw.
https://www.sciencedirect.com/science/a ... 3524026377 (Zitatquelle)
Kurzfassung: Teebeutel aus genannten Quellen erworben, geleert, mit heißem Wasser überbrüht (typical use), Anteile von Mikroplastik bestimmt. So wie ich es verstanden habe, geht es um unseren Verdauungsweg, den möglichen Effekt auf die Körperaufnahme an Was und Wieviel. Aussen vor andere Themen wie alternative Materialien sowie Entsorgung (statt Kompost),
Bildquelle der o.g. Artikel, Abschnitt "3. Results and discussion"1. Introduction
Plastics are extensively used in modern society due to their many key properties and advantages including versatility, durability, cost-effectiveness, lightweight nature, hygiene, and safety, among others. Concretely, plastic has revolutionized the food packaging sector by extending the shelf life of fresh food, enabling essential health applications, and contributing to lighter and safer shipping (Dolci et al., 2024). However, despite these advantages, the widespread use of plastic has raised concerns about environmental pollution, resource depletion, and health risks associated with certain plastic additives and their degradation into micro- (5 mm - 1 μm) and nanoplastics (<1 μm) (MNPLs) (...)
Among the different food containers releasing MNPLs, teabags stand out. Recent investigations have elucidated that teabags significantly contribute to the release of millions of MNPLs, adding to their daily ingestion by humans (Banaei et al., 2023). (...)
2. Materials and methods
2.1. MNPLs obtention
Three teabag types were purchased online (Amazon and AliExpress) or in a local supermarket. The online-purchased teabags were ordered empty (with no tea inside) and with a known polymer composition; nylon teabags (Amazon, sample 1) and polypropylene teabags (AliExpress, sample 2). The third teabag type (sample 3), bought in the supermarket, was a regular tea brand of green tea, but with an unknown filter polymer. To obtain the MNPLs leached from the teabag's filters, the protocol already implemented and described in our previous work was followed with slight changes (Banaei et al., 2023). Briefly, the teabags containing tea were emptied and rinsed three times with sterile Milli-Q water. Afterward, for all three different teabags samples, 300 teabags were transferred into a 1 L beaker (pre-washed and sterilized) containing 600 mL of Milli-Q water at 95 °C with constant stirring (750 rpm). (...)
(...)
In summary, the potential implications of the above-reported findings in human health can be multiple. Thus, the polymer composition of MNPLs significantly influences their biological interactions, leading to varied targeting and effects on organs, tissues, and cells. These differences can result in specific accumulation patterns, toxicity profiles, immune responses, and long-term health effects such as genotoxicity and carcinogenicity. Therefore, this study sheds light on understanding these relationships, which are crucial for assessing the environmental and health risks associated with real-world MNPL ingestion. However, further efforts to clarify real exposures to MNPLs in human biomonitoring studies will be crucial to mimic laboratory conditions. Moreover, more work needs to be done to increase the repository of reference materials, since the scientific community needs to unveil the toxicological profile of a wide range of representative MNPLs, comprising their additives and by-products. Finally, it will be essential to understand the physicochemical transformations of MNPLs when deposited in different matrices (e.g., extracellular and mucus matrix, food bolus, human digestion process, etc.) as cell internalization and consequent effects have been reported to be modulated (...)
Links:
https://de.wikipedia.org/wiki/Mikroplastik
https://de.wikipedia.org/wiki/Biologisc ... Kunststoff
https://www.umweltbundesamt.de/search/c ... ted%20desc (Datum absteigend)
https://www.chip.de/news/Teebeutel-unte ... 25587.html
https://www.swr.de/wissen/1000-antworte ... h-108.html
P.S. Tee trinken und abwarten ...
... doch lieber Kaffee? 
