Health
Early Introduction of Peanuts Linked to Sharp Decline in Childhood Allergies, Study Finds
A major shift in medical advice on introducing food allergens to infants appears to be paying off, with new research showing a significant drop in peanut allergies among American children.
According to a study published in the journal Pediatrics, roughly 60,000 children in the United States have avoided developing peanut allergies since 2015, when medical guidelines began recommending that babies be introduced to peanut-containing foods as early as four months of age. The new approach, which aligned U.S. policy with European standards, reversed decades of previous advice that urged parents to delay introducing such foods.
Dr. David Hill, an allergist and researcher at the Children’s Hospital of Philadelphia, said the findings mark a major success in allergy prevention. “I can actually come to you today and say there are fewer kids with food allergy today than there would have been if we hadn’t implemented this public health effort,” Hill said.
The research team examined health data from dozens of pediatric practices across the country, tracking food allergy diagnoses before and after the introduction of the new guidelines. They found that peanut allergies in children up to age three dropped by more than 27 percent after the 2015 recommendations for high-risk infants and by over 40 percent after the guidelines were expanded in 2017 to include all children.
Peanut allergy occurs when the immune system mistakenly identifies peanut proteins as harmful, triggering symptoms that can include hives, respiratory distress, and even life-threatening anaphylaxis. For years, experts believed delaying exposure could help prevent these reactions. However, the landmark 2015 LEAP (Learning Early About Peanut Allergy) trial led by Professor Gideon Lack at King’s College London overturned that view. The study found that introducing peanut products to infants dramatically reduced the risk of developing peanut allergies by more than 80 percent, with protection lasting well into adolescence.
Despite the evidence, adoption of the new guidance was initially slow. Some parents and health professionals were uncertain about how to safely introduce allergens outside clinical trials. Hill noted that updated recommendations issued in 2021 clarified the process, encouraging parents to introduce peanuts and other allergenic foods between four and six months without the need for prior testing.
“It doesn’t have to be a lot of food,” Hill said. “Small tastes of peanut butter, milk-based yoghurt, soy-based yoghurts, or tree nut butters are simple, safe ways to expose the immune system early on.”
The findings offer a hopeful sign that early exposure to allergens could help reduce food allergies on a population level—transforming what was once a life-threatening childhood condition into a largely preventable one.
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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