Ultra-Processed Foods: The Smoking Gun Behind the Obesity Epidemic For years, the mainstream chorus has been singing the same tired tune: “It’s just calories in, calories out.” Move more, eat less, and voilà—problem solved. But a new study published in PNAS just torched that simplistic model and handed the mic to what many dismissed as fringe theory: ultra-processed foods (UPFs) aren’t just empty calories—they’re …
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