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Study finds infrasound can raise cortisol and irritability even when people can’t hear it
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A small controlled experiment reported in Frontiers in Behavioral Neuroscience found that exposure to infrasound—ultra-low-frequency vibration below the range of human hearing—was associated with higher salivary cortisol and more negative mood ratings, even though participants could not reliably detect when the infrasound was present.
New research links chronic stress combined with late-night eating to increased risks of constipation, diarrhea, and reduced gut microbiome diversity. Scientists analyzed data from over 11,000 participants in a national survey. The findings are set to be presented at Digestive Disease Week on May 4.
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A study funded by the U.S. National Institute on Aging concludes that interacting with problematic people accelerates biological aging. Each additional such person increases biological age by about nine months and speeds up the aging rate by 1.5%.