Health
High Mercury Levels in Canned Tuna Across Europe Spark Health Concerns
A recent report by marine conservation NGO Bloom and consumer advocacy group Foodwatch reveals elevated mercury levels in canned tuna across Europe, raising new concerns about public health risks. Analyzing nearly 150 tuna cans from Germany, the United Kingdom, Spain, France, and Italy, the NGOs found that every sample contained mercury, with 57% surpassing the 0.3 parts per million (ppm) mercury limit imposed on other types of fish.
The findings have fueled a call for stronger regulations in Europe to address mercury levels in tuna. Currently, the European standard for mercury in tuna is set at a maximum of 1 ppm—more lenient than the threshold for other fish. “The tuna industry’s influence has set these lenient standards, but we won’t give up until we achieve more protective regulations,” stated Karine Jacquemart, CEO of Foodwatch France.
Concerns Over Health Impacts
Mercury, particularly in the form of methylmercury, is classified by the World Health Organization (WHO) as a potential carcinogen, posing significant risks, especially to vulnerable groups. The European Food Safety Authority (EFSA) set the tolerable weekly intake (TWI) for methylmercury at 1.3 micrograms per kilogram of body weight in 2012, double the TWI set in the United States. Given these limits, Bloom researcher Julie Guterman warns that even a single portion of canned tuna could exceed safe levels for consumers over 79 kg.
“Methylmercury is a neurotoxin that harms nervous tissue and affects cognitive development in unborn children and young children,” explained Dr. Philippe Grandjean, a professor in environmental medicine, in a statement. Prolonged exposure to methylmercury can impact memory, language, and motor skills, as well as fine motor and spatial vision.
The phenomenon of bioaccumulation explains why tuna and other high-food-chain species like swordfish and sharks are particularly susceptible to mercury contamination. Mercury, a byproduct of natural occurrences like volcanic eruptions and human activities such as coal combustion, becomes more toxic when it interacts with ocean bacteria, transforming into methylmercury. As tuna consume smaller fish, they accumulate methylmercury, passing it up the food chain to consumers.
Calls for Change and Consumer Protection
Bloom and Foodwatch have launched an initiative calling for the reduction of the tuna mercury threshold to 0.3 ppm. They’ve also initiated a petition targeting major European retailers—including Carrefour, Lidl, and Edeka—urging them to remove high-mercury tuna products from their shelves and to raise awareness of the health risks for consumers.
In response, the European Commission defended its current regulations, noting that maximum mercury levels for fish are set “as low as reasonably achievable” based on real-world data. Officials also argued that lowering the threshold further could disrupt the food supply.
As consumer advocacy groups continue to push for stricter guidelines, the Commission says it will monitor scientific advancements to ensure European food safety standards remain up-to-date. For now, however, Bloom and Foodwatch warn that with the European average consumption of tuna exceeding 2.8 kilograms per person annually, awareness and caution are essential when it comes to dietary choices involving tuna.
Health
World Cup Emotion Can Strain the Heart, Cardiologists Warn Fans at Risk
As the World Cup begins, medical experts are cautioning football fans with underlying heart conditions that the emotional intensity of matches can place unexpected strain on the cardiovascular system.
Cardiologists say that the excitement, tension, and anxiety generated during high-stakes games can trigger physical reactions similar to intense exercise, raising heart rate, blood pressure, and stress hormones.
“Intense emotions, whether positive or negative, can act as ‘precipitating risk factors’ for cardiovascular events such as heart attack,” said Paola Santalucia, a cardiologist and board member of the European Heart Network.
She explained that moments of extreme excitement, such as a decisive penalty shootout or a last-minute goal, may pose risks for people already living with heart disease. Those with additional risk factors, including hypertension, obesity, or smoking habits, are also advised to be cautious during emotionally charged matches.
Research using wearable devices has shown that during major football events, some fans experience heart rates climbing as high as 150 beats per minute. That level is comparable to sprinting and reflects how strongly the body reacts to emotional stress.
A study examining supporters during the 2025 German Cup final found that even watching from home can significantly affect physiological responses. “They still had an increase in heart rate that compares to walking, even though they didn’t walk,” said Christian Deutscher, professor of sports economics at Bielefeld University and co-author of the study.
He noted that the most intense reactions often occur not during goals themselves, but during moments of uncertainty such as VAR checks, penalty shootouts, or shots striking the post. These unpredictable situations, he said, are what drive the strongest emotional and physical responses among fans.
Deutscher also pointed out that stadium spectators may experience even greater strain due to environmental factors such as heat and alcohol consumption.
However, experts emphasize that football itself is not inherently dangerous. Instead, it is the body’s natural response to excitement that can create temporary stress.
“The adrenergic stimulation is at its max: extreme high blood pressure, high heart rate, and adrenaline, cortisol, skyrocketing,” said Dan Atar, professor of cardiology at Oslo University Hospital. In rare cases, he added, this surge can contribute to the rupture of arterial plaque in vulnerable individuals, potentially leading to a heart attack.
Atar stressed that such events can occur in everyday situations as well, including physical exertion like shoveling snow. “It is in no way dangerous to watch a football game,” he said. “All this is physiologic. It’s not dangerous to be excited.”
Still, he acknowledged that combining emotional stress with alcohol, heat, and pre-existing conditions can increase risk for some viewers.
Doctors advise those at higher risk to continue prescribed medications, limit alcohol intake, avoid smoking, and watch for warning signs such as chest pain or irregular heartbeat.
“The key message is not to avoid enjoying the match, but to do so with moderation and awareness,” Santalucia said.
Health
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Health
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