A recent study by the consumer association Que Choisir has revealed that matcha, a popular green tea powder, may contain aluminum. The association tested seven different matcha products and found all of them to have some level of aluminum contamination. According to the study, 39% of adults in France consume more aluminum than the updated safety limit set by French health authorities. This is concerning because aluminum, when consumed in high amounts over time, has been linked to various health issues, including neurological effects. The European Food Safety Authority (EFSA) previously set a reference toxicological value (RTV) for aluminum at 143 micrograms per kilogram of body weight per day in 2008. However, in 2025, the National Agency for Food, Environmental and Occupational Health Safety (Anses) lowered this threshold to 40 micrograms per kilogram of body weight per day, making it 3.5 times stricter. A 2026 study on total diet (EAT) found that 39% of adults exceed this new limit, highlighting the need for continued efforts to reduce aluminum exposure. Anses has emphasized the potential health risks of this exposure and urged for measures to lower aluminum levels in food. Matcha's preparation method contributes to aluminum contamination. Unlike regular green tea, where the leaves are brewed and only a portion of the substance is consumed, matcha is made from powdered tea leaves that are entirely ingested. This means that any aluminum present in the leaves is also consumed in full. Que Choisir explains that while this method allows for maximum absorption of beneficial compounds like antioxidants and caffeine, it also leads to the full absorption of contaminants like aluminum. Although none of the tested matcha products violated current regulations, the European Union has not established a specific maximum limit for aluminum in food and beverages. This means that matcha producers can legally market their products with claims such as "stimulating and invigorating properties" or "strengthened immune system." However, Que Choisir warns that not all matcha products are equally contaminated, with the cheapest options generally performing worst in their tests. The association advises regular consumers to reconsider their intake of matcha and other products that may contain aluminum, such as cookies, plant-based milks, iced teas, and sodas.