Studi menemukan kopi memperbaiki suasana hati melalui bakteri usus

Baik kopi berkafein maupun tanpa kafein dapat meningkatkan suasana hati dan kinerja mental dengan memengaruhi mikroba usus. Para peneliti menemukan bahwa polifenol dalam kopi mendorong banyak manfaat tersebut. Temuan ini berasal dari uji coba terkontrol yang melibatkan 62 orang dewasa yang sehat.

John Cryan di University College Cork memimpin studi tersebut bersama rekan-rekannya dari Italia. Peserta mencakup peminum kopi rutin dan bukan peminum kopi. Pengguna rutin berhenti minum kopi selama dua minggu sebelum kembali mengonsumsi versi kopi biasa atau tanpa kafein selama tiga minggu. Para ilmuwan melacak perubahan melalui sampel darah, air liur, urine, dan tinja, serta melalui tes suasana hati dan kognisi.

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Stressed teenagers surrounded by sugary drinks in a cafeteria, illustrating research linking soda consumption to anxiety symptoms in adolescents.
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Review finds sugary drinks are consistently associated with anxiety symptoms in adolescents

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A systematic review and meta-analysis led by Bournemouth University researchers found a consistent association between higher consumption of sugar-sweetened drinks and greater reports of anxiety symptoms among adolescents. The authors say the evidence does not prove sugary drinks cause anxiety, but argue the findings warrant more attention to diet’s potential links with teen mental health.

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Researchers at the University of Toronto Scarborough have found that feeling mentally sharp on a given day can boost productivity by up to 40 minutes. The study, published in Science Advances, tracked university students over 12 weeks and connected clearer thinking to setting and achieving bigger goals. Factors like sleep and workload influence these daily fluctuations.

Coffee enthusiasts are moving beyond basic sweeteners to explore fruit infusions, herbs, spices, and innovative processing techniques. This flavor movement highlights natural ingredients and the bean's complexity, particularly in East Africa's urban cafes. Baristas in Nairobi's Gigiri neighborhood blend local tropical fruits with global methods for unique brews.

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A comprehensive study of over 3,500 adults has found that consuming more dietary fibre is associated with increased time in deep sleep. Participants who ate above-average amounts of fibre spent more time in restorative sleep stages and had lower heart rates at night. Greater variety in plant-based foods also helped some fall asleep faster.

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