Health & Fitness

Could popular diabetes and weight loss drugs like Ozempic actually protect your brain from stroke damage, or prevent strokes altogether? Three new studies presented at a major neurosurgery conference suggest they might.

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In a fascinating twist, Mayo Clinic researchers discovered that a sugar molecule cancer cells use to hide from the immune system might also protect insulin-producing beta cells in type 1 diabetes. By engineering these cells with the same sugar molecule—sialic acid—they prevented immune attacks in lab models. This approach could lead to better transplant options without broad immune suppression, offering hope for millions living with the autoimmune disease.

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Scientists have discovered the oldest direct evidence of betel nut chewing in Southeast Asia by analyzing 4,000-year-old dental plaque from a burial in Thailand. This breakthrough method reveals invisible traces of ancient plant use, suggesting psychoactive rituals were part of daily life long before written records.

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Scientists at Kyoto University have developed a groundbreaking "lung-on-a-chip" that can mimic the distinct regions of human lungs—airways and alveoli—to study how viruses like COVID-19 affect them differently. Powered by isogenic induced pluripotent stem cells (iPSCs), the system offers a high-fidelity way to model personalized immune responses and test drug effectiveness. This innovation opens the door to precision medicine, deeper understanding of emerging viruses, and even modeling of other organs in the future.

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Scientists at Columbia Engineering have developed an injectable hydrogel made from yogurt-derived extracellular vesicles (EVs) that could revolutionize regenerative medicine. These EVs serve both as healing agents and as structural components, eliminating the need for added chemicals. The innovation leverages everyday dairy products like yogurt to create a biocompatible material that mimics natural tissue and enhances healing.

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A mysterious gut hormone may be behind many cases of chronic diarrhea, especially in people with undiagnosed bile acid malabsorption, a condition often mistaken for irritable bowel syndrome. Researchers from the University of Cambridge identified that the hormone INSL5 spikes when bile acid reaches the colon, triggering intense diarrhea. Their discovery not only sheds light on the biological cause of symptoms but opens the door to a diagnostic blood test and new treatment options, including a surprising existing drug that blocks this hormone’s effects.

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Between 2020 and 2024, COVID-19 vaccines saved 2.5 million lives globally, preventing one death for every 5,400 doses. A groundbreaking worldwide study led by researchers from Università Cattolica and Stanford University reveals that most lives were saved before individuals were exposed to the virus, particularly during the Omicron period and among those aged 60+. The researchers also calculated 14.8 million years of life saved, with the elderly gaining the majority of these benefits.

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