Tea is a cornerstone of British life, poured at breakfast, mid-morning, and often in the evening. It’s long been celebrated for its calming effects, digestive benefits, and ability to boost focus. But new research suggests that your daily cuppa may carry hidden health risks that many drinkers are unaware of.

Tea, an integral part of British culture, is enjoyed at breakfast, mid-morning, and often in the evening. Known for its soothing properties, digestive advantages, and ability to enhance concentration, tea has long been a staple in many households. However, recent research highlights potential health risks associated with this beloved beverage, which may come as a surprise to many tea enthusiasts.

Professor Mohamed Abdallah, who led the research, explained that tea can contain up to 60 microplastic particles per litre—roughly 12 to 15 per cup.

By contrast, energy drinks contained an average of 25 MPs/L and soft drinks 17 MPs/L, suggesting that higher temperatures increase plastic particle release. Takeaway cups, often lined with plastic, further raise exposure, averaging 22 microplastic particles per cup compared with 14 in a glass mug, the Telegraph reported.

Leading the study, Professor Mohamed Abdallah reported that a litre of tea can contain up to 60 microplastic particles, which translates to approximately 12 to 15 particles per cup.

In comparison, energy drinks were found to have an average of 25 microplastic particles per litre, while soft drinks contained about 17 per litre. The research suggests that higher temperatures may increase the release of plastic particles. Additionally, takeaway cups, which are often lined with plastic, significantly increase exposure, with an average of 22 microplastic particles per cup, compared to 14 particles found in a glass mug, according to The Telegraph.

“Microplastics are tiny fragments that result from the degradation of larger plastic materials or are manufactured for specific products,” explained Prof Abdallah.

He further noted, “These particles are now present in water, food, air, and even within human tissues.” Although the complete impact of microplastics on human health is still under investigation, studies in labs and on animals have associated them with inflammation, hormonal imbalances, and disruptions to the gut microbiome.

Another consideration is tannins, compounds that give tea its characteristic bitterness. Tannins can bind to non-heme iron found in plant-based foods, limiting absorption.

This is most relevant for vegetarians, vegans, and pregnant women. Strategies to reduce this effect include drinking tea between meals, pairing iron-rich foods with vitamin C, or limiting intake to three cups per day.

Despite these potential risks, tea remains a safe and enjoyable drink for most people when consumed thoughtfully.

Simple measures, such as choosing loose-leaf tea, avoiding plastic-lined cups, timing consumption, and moderating intake, can help Brits enjoy their beloved brew while minimising potential health risks.