July 2024
- Jul 11, 2024ExplainersGut Microbiome Functions: Health and DigestionA 2016 Weizmann analysis put it near 38 trillion microbial against 30 trillion human cells, which revises the number without changing the point. The page then grades its own claims, marking fiber fermentation and stool transplant for recurrent C. difficile as strong while calling the mood evidence moderate, and noting gut serotonin does not cross into the brain.
- Jul 7, 2024ExplainersHow Stress Damages the Body: The Biology of Chronic StressJanice Kiecolt-Glaser studied spousal caregivers of Alzheimer's patients, a model of inescapable stress, and found standardized wounds healed about 24 percent more slowly than in matched controls. Sheldon Cohen's cold-virus studies found chronically stressed volunteers two to three times more likely to develop clinical infection. The pattern runs from Hans Selye's 1930s rats to the Whitehall finding that cardiovascular mortality rises at every step down the job hierarchy.
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