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Gut bacteria evolve rapidly in response to different diets, UCLA evolutionary biologists report in a new study. The researchers found that gene variants that help microbes digest starches found in ultra-processed foods have “swept” the genomes of some species of gut bacteria in industrialized parts of the world. Because these starches are industrially produced and have…

Debra Pierce holds up a picture of Stanley Sears, her brother, while standing in the yard of the mobile home he was renovating before his death in 2024. Pierce believes North Carolina’s Martin County needs higher-level emergency services and a hospital. Sarah Jane Tribble/KFF Health Newshide caption