Health & Fitness

Climate change is silently sapping the nutrients from our food. A pioneering study finds that rising CO2 and higher temperatures are not only reshaping how crops grow but are also degrading their nutritional value—especially in vital leafy greens like kale and spinach. This shift could spell trouble for global health, particularly in communities already facing nutritional stress. Researchers warn that while crops may grow faster, they may also become less nourishing, with fewer minerals, proteins, and antioxidants—raising concerns about obesity, weakened immunity, and chronic diseases.

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Losing weight isn’t always winning at health, say experts challenging the long-standing obsession with BMI and dieting. New evidence shows that most people with higher body weight can’t sustain long-term weight loss through lifestyle changes—and the pressure to do so may actually cause harm. From disordered eating to reinforced stigma, the consequences go beyond the physical. A growing movement urges doctors to shift away from the scale and toward personalized, compassionate care that values overall well-being, not just shrinking waistlines.

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UCLA scientists mined millions of electronic health records and uncovered four distinct “roadways” that funnel people toward Alzheimer’s—ranging from mental-health struggles to vascular troubles. Following these breadcrumb trails proved far better at predicting who will develop dementia than single risk factors. The findings hint that spotting—and halting—specific sequences early could rewrite how we prevent the disease.

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Feeling jittery as the week kicks off isn’t just a mood—it leaves a biochemical footprint. Researchers tracked thousands of older adults and found those who dread Mondays carry elevated cortisol in their hair for months, a stress echo that may help explain the well-known Monday heart-attack spike. Even retirees aren’t spared, hinting that society’s calendar, not the workplace alone, wires Monday anxiety deep into the HPA axis and, ultimately, cardiovascular risk.

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People who treat hearing loss with hearing aids or cochlear implants regain rich conversations, escape isolation, and may even protect their brains and lifespans—proof that better hearing translates into fuller living.

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A promising path to fighting COVID and other coronaviruses may have been based on a serious mistake. Scientists had zeroed in on a part of the virus called the NiRAN domain, believed to be a powerful target for new antiviral drugs. But when a Rockefeller team revisited a highly cited 2022 study, they found the evidence didn’t hold up. Key molecules shown in the original virus model were actually missing. Their discovery could help prevent wasted time and resources in the race to develop better treatments—and highlights how even one bad blueprint can throw off years of research.

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Scientists have discovered that the bacteria behind Lyme disease and anaplasmosis have a sneaky way of surviving inside ticks—they hijack the tick’s own cell functions to steal cholesterol they need to grow. By tapping into a built-in protein pathway, the bacteria keep themselves alive until they can infect a new host. The research opens the door to new methods of stopping these diseases before ticks ever get the chance to bite. A new web tool also reveals that this trick might be used by other blood-feeding bugs too.

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