New study reveals coffee's benefits on microbiome and mood

A recent study has uncovered additional health benefits of coffee, including its effects on the microbiome, inflammation, and mood. The research shows that regular consumption influences the gut-brain axis, with even decaf offering perks. These findings highlight interactions beyond caffeine's stimulant properties.

Researchers have identified new mechanisms through which coffee supports health. The study demonstrates how regular coffee consumption modifies the microbiome, reduces inflammation, and positively influences mood. This occurs via the gut-brain axis, a bidirectional communication network linking the digestive system to brain activity, revealing a complex interaction that extends past caffeine's known stimulant effects. Even decaf coffee provides these advantages, according to the findings published ahead of today's date.

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Scientific illustration depicting gut bacteria eroding the colon's mucus layer, causing dry stool and constipation, based on Nagoya University research.
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Nagoya University study links chronic constipation to mucus-degrading gut bacteria, suggests new treatment target

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Researchers at Nagoya University report that two common gut microbes can work together to break down the colon’s protective mucus layer, leaving stool dry and difficult to pass—an effect that standard laxatives may not address. The team also found higher levels of these bacteria in people with Parkinson’s disease, who often experience constipation decades before motor symptoms, and showed in mice that disabling a key bacterial enzyme prevented constipation.

Both caffeinated and decaffeinated coffee can boost mood and mental performance by influencing gut microbes. Researchers found that polyphenols in coffee drive many of these benefits. The findings come from a controlled trial involving 62 healthy adults.

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Researchers at Edith Cowan University have discovered that varying training intensities can alter the gut bacteria composition in athletes. The study highlights how intense workouts influence microbial balance, while periods of rest lead to dietary shifts and slower digestion. These findings suggest potential links between gut health and athletic performance.

Gut bacteria that recycle oestrogens back into the bloodstream are far more abundant in people from industrialised societies than in hunter-gatherers and rural farmers, according to a new study. Researchers found up to seven times greater recycling capacity in urban populations. The findings raise questions about potential health impacts from elevated hormone levels.

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Polyphenols, natural plant compounds acting as antioxidants, help reduce inflammation and support health, according to experts cited in a Vogue article. Registered dietitians recommend incorporating berries, dark chocolate, coffee, artichokes, apples, nuts, seeds, and herbs. These foods provide varying amounts of polyphenols, with benefits linked to disease prevention.

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