Health
Mediterranean Diet Linked to Lower Dementia Risk, Study Finds
A long-term study has found that people who follow a Mediterranean-style diet are less likely to develop dementia and experience slower cognitive decline, even if they carry genetic risk factors for Alzheimer’s disease.
The research, published in Nature Medicine, highlights the role of diet in offsetting the risks associated with APOE4, a genetic variant known to increase the likelihood of Alzheimer’s. Individuals with one copy of the variant face a threefold risk, while those with two copies are up to 12 times more likely to develop the condition.
Despite these risks, the study shows that diet can make a significant difference. Researchers from a Harvard University hospital analyzed data spanning more than three decades from over 4,200 women and nearly 1,500 men. Participants’ dietary habits, blood samples, and genetic data were examined, with a smaller group also undergoing regular cognitive assessments.
The findings suggest that individuals who consistently ate a Mediterranean-style diet—rich in vegetables, fruits, nuts, whole grains, and low in red and processed meats—were less likely to develop dementia and showed slower rates of cognitive decline compared to those who did not.
“These findings suggest that dietary strategies, specifically the Mediterranean diet, could help reduce the risk of cognitive decline and stave off dementia by broadly influencing key metabolic pathways,” said Yuxi Liu, one of the study’s authors. “This recommendation applies broadly, but it may be even more important for individuals at a higher genetic risk, such as those carrying two copies of the APOE4 genetic variant.”
The research team noted that the APOE protein normally helps transport fats like cholesterol in the bloodstream and brain. The APOE4 variant appears to disrupt that process, affecting how the brain handles inflammation and the buildup of amyloid plaques—two factors strongly linked to Alzheimer’s disease. Still, carrying the variant does not mean someone will inevitably develop the illness.
About one-quarter of people have one copy of APOE4, while two to three percent carry two copies.
While the study strengthens the case for diet as a preventive tool, the researchers acknowledged limitations. The participants were mostly well-educated and of European ancestry, which means further studies in more diverse populations are needed to confirm the findings.
Even so, the authors said the results could change how doctors assess Alzheimer’s risks, suggesting that genetic and metabolite testing may become a greater part of future evaluations.
“In future research, we hope to explore whether targeting specific metabolites through diet or other interventions could provide a more personalised approach to reducing dementia risk,” Liu said.
The Mediterranean diet has previously been linked to improved cardiovascular health and longer lifespans. This latest study adds to growing evidence that it could also play a key role in protecting the brain from age-related decline.
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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