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ScienceDaily · 7 Sept 2026

Your gut microbiome may be more contagious than scientists thought

Study. University of Vienna researchers writing in Nature used reverse-ecology genomics on thousands of gut isolates and metagenomes. Familiar species split into adapted populations, some tracking with older age, IBD, colorectal cancer, and type 2 diabetes. Competitive lineages also appear to have spread across continents in decades. This is evolutionary mapping, not proof that you catch disease from a roommate and not a probiotic prescription. Diet, medicines, and contact may all shape which strains settle.

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ScienceDaily · 6 Sept 2026

Popular brain supplement linked to shorter lifespan in men

Study (observational plus Mendelian randomization). Zhao, Sun, Zhang and Ye (Hong Kong and Georgia) analyzed more than 270,000 UK Biobank participants in Aging-US. Higher blood tyrosine tracked with shorter predicted male lifespan—about a year in genetic estimates—while women showed no significant effect. Phenylalanine dropped out after adjusting for tyrosine. The authors did not test tyrosine pills; this is not proof that a focus supplement shortens life. Protein restriction to lower tyrosine is unproven as a longevity tactic and can work against muscle in older adults. Discuss supplements with a clinician.

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ScienceDaily · 6 Sept 2026

This lifestyle program improved cognition 55% more than basic health advice

Study (randomized trial). LatAm-FINGERS, presented at AAIC 2026 and published in The Lancet, followed 1,065 older adults at 12 sites in 11 Latin American countries for two years. A structured program (coached exercise including salsa and tango, a locally adapted MIND diet, cognitive training, vascular-risk checks, and 38 group meetings) produced a 55% greater gain on a global cognition composite than a lighter education arm. Memory, executive function, and processing speed also improved more with coaching. This is risk-reduction research, not a dementia cure and not a supplement protocol.

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