Health & Fitness

Sleep isn’t just about feeling rested—it may be one of the strongest predictors of how long you live. Researchers analyzing nationwide data found that insufficient sleep was more closely tied to shorter life expectancy than diet, exercise, or loneliness. The connection was consistent year after year and across most U.S. states. The takeaway is simple but powerful: getting seven to nine hours of sleep may be one of the best things you can do for long-term health.

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Pancreatic cancer is notoriously hard to treat, often resisting therapies that target its most common mutations. Researchers have now uncovered a hidden three-part loop that fuels tumor growth, involving the cancer drivers SRSF1, AURKA, and MYC. By targeting just one part of this loop with a specially designed molecule, they were able to shut down all three at once. The result was a dramatic loss of tumor cell survival, offering new hope for smarter, more effective treatments.

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Sugar-loving mouth bacteria create acids that damage teeth, but arginine can help fight back. In a clinical trial, arginine-treated dental plaque stayed less acidic, became structurally less harmful, and supported more beneficial bacteria. These changes made the biofilms less aggressive after sugar exposure. The results point to arginine as a promising, natural addition to cavity-prevention strategies.

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Long COVID affects an estimated 65 million people worldwide and can damage the brain, heart, blood vessels, and immune system long after infection. Researchers now link symptoms to lingering virus, inflammation, micro-clots, and disrupted energy metabolism. While structured rehab and pacing can improve quality of life, a growing list of experimental treatments—from antivirals and metformin to microbiome therapies and biologics—shows early promise. Clear answers, however, are still limited by small studies and the lack of large, definitive trials.

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Scientists are uncovering why Brazil may be one of the most important yet underused resources for studying extreme longevity. Its highly diverse population harbors millions of genetic variants missing from standard datasets, including rare changes linked to immune strength and cellular maintenance. Brazilian supercentenarians often remain mentally sharp, survive serious infections, and come from families where multiple members live past 100. Together, they reveal aging not as inevitable decline, but as a form of biological resilience.

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A brief, intense workout may do more than boost fitness—it could help fight cancer. Researchers found that just 10 minutes of hard exercise releases molecules into the bloodstream that switch on DNA repair and shut down cancer growth signals. When these molecules were applied to bowel cancer cells, hundreds of cancer-related genes changed activity. The discovery helps explain how exercise lowers cancer risk and hints at future therapies inspired by movement.

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A large review of studies suggests that exercise can ease depression about as effectively as psychological therapy. Compared with antidepressants, exercise showed similar benefits, though the evidence was less certain. Researchers found that light to moderate activity over multiple sessions worked best, with few side effects. While it’s not a cure-all, exercise may be a powerful and accessible tool for many people.

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