Health
Study Links Agricultural Pesticide Exposure to Higher Cancer Risk in Peru
Living in areas with high agricultural pesticide exposure is associated with higher cancer risks, according to a new study that highlights potential health impacts in vulnerable communities. Researchers found that widespread exposure to pesticides in food, water and the environment may increase the likelihood of developing certain cancers.
The study, published in Nature Health, analysed environmental data, cancer registries and biological samples across Peru. It found a strong association between pesticide exposure and cancer risk, marking one of the first large-scale efforts to connect environmental contamination with biological changes linked to the disease.
“This is the first time we have been able to link pesticide exposure, on a national scale, to biological changes suggesting an increased risk of cancer,” said Stéphane Bertani, a molecular biology researcher at the French National Research Institute for Sustainable Development.
The research was conducted in collaboration with several institutions, including the Institut Pasteur, the University of Toulouse and Peru’s National Institute of Neoplastic Diseases. Scientists mapped pesticide dispersion across the country over a six-year period from 2014 to 2019, identifying regions with the highest exposure levels.
The findings showed that people living in these high-risk zones were about 150% more likely to develop cancer. Areas of moderate to high exposure covered more than one-third of Peru’s territory, with contamination spreading up to 30 to 50 kilometres beyond agricultural land due to environmental factors such as wind and terrain.
The study examined data from more than 150,000 cancer patients diagnosed between 2007 and 2020. The highest exposure levels were found in the Andean highlands, where limited rainfall can intensify the accumulation of chemicals. Researchers noted that even pesticides not classified as carcinogenic by the World Health Organization may still contribute to harmful biological changes over time.
Laboratory analysis revealed that pesticide exposure can disrupt cellular processes that help maintain normal function. These disruptions may occur long before cancer develops, potentially increasing vulnerability to other risks such as infections or inflammation.
The study also found that certain cancers were more closely linked to pesticide exposure, particularly epithelial cancers affecting the digestive system, lungs and skin. In Peru, cases of liver cancer were found to overlap with regions of heavy pesticide use, raising questions about environmental factors contributing to the disease.
Researchers said the findings highlight the challenges of tracking pesticide exposure, given its widespread presence in ecosystems. They also warned that communities with limited healthcare access and intensive agricultural activity may face greater risks.
The study calls for stronger regulatory policies and improved monitoring to address environmental health risks. Experts say understanding how pesticide exposure affects human biology could play a key role in preventing cancer and protecting at-risk populations.
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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