Health
Experts Urge Caution Amid Growing Hype Over Gut Health Claims
From social media trends to supermarket shelves, gut health has become one of the biggest buzzwords in modern wellness. But scientists warn that much of the hype surrounding the microbiome — the vast community of bacteria and microorganisms living in the digestive tract — often outpaces the science.
In an interview with Euronews Health, leading microbiologists and gastroenterologists said that while research into gut health is promising, many popular claims about “fixing” or “optimizing” the gut are misleading or exaggerated.
“The microbiome is incredibly complex,” said Professor Alan Walker, a microbiologist at the University of Aberdeen. “It’s very rare that you can give a straight, 100 per cent answer that applies to everyone, because everyone is so different. Simple stories really don’t exist.”
Over the past decade, the gut microbiome has been linked to a range of conditions — from diabetes and heart disease to insomnia and even cancer — but experts caution that definitive evidence is still emerging. In the meantime, commercial products and “gut health” tests have flooded the market, many of which are built on shaky science.
At-Home Tests and Quick Fixes Under Scrutiny
Dr. Lucas Wauters, a gastroenterologist at University Hospitals Leuven in Belgium, said that while some stool-based tests can detect useful medical markers, most commercial gut tests oversimplify the results.
“Simple indices and indicators are always very misleading,” he explained. “If test results are coupled with supplement recommendations or links to buy treatments, that’s a red flag.”
Wauters and Walker both warned against buying into expensive “gut detoxes” or supplements that claim to rebalance bacteria or boost digestion. “If the proof isn’t there, it doesn’t mean it won’t work — but it’s a leap of faith,” Walker said.
Probiotics and DIY Treatments Pose Risks
Probiotic foods such as yogurt, kimchi, and kefir do contain beneficial bacteria, but Walker noted that their effects are often overstated. “If we’re being honest, the level of evidence that those things actually work is very patchy,” he said.
Meanwhile, a growing number of people are experimenting with at-home faecal transplants — a dangerous trend, experts warned. While medical faecal transplants can successfully treat certain infections, self-administered procedures can lead to serious harm. “This should never be done outside clinical recommendations,” Walker said.
Stick to the Basics
Experts agreed that the best way to support gut health remains simple: maintain a balanced diet, drink plenty of water, and exercise regularly. Foods rich in fibre — such as oats, beans, and kiwis — can promote healthy digestion, but individual tolerance levels vary.
“There’s a lot of promise in gut microbiome research,” Walker said. “But for most interventions, we still need better-quality evidence. Until then, the fundamentals — healthy food, hydration, and movement — remain the best medicine.”
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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