Health
Gut Microbiome Testing: What It Can and Cannot Tell You Today
Mail-in stool tests promise personalized nutrition insight, but the same sample sent to different labs can come back with conflicting advice.
Oct 3, 2025
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12 stories for“direct to consumer health test”
Health
Something Has Been Crossing Into the Ageing Human Brain That Was Not Supposed to Get In
Stanford researchers borrowed the trick a consumer ancestry test uses and found immune cells migrating out of the blood and into the human brain from middle age onwards. Mice do not do it. Nor did the primates tested alongside them.
Aug 25, 2026
Health
Nobody Ever Found the Study Behind Eight Glasses of Water a Day, Because There Is Not One
A physiologist went looking for the origin of the rule in 2002 and came back empty. What the reference intakes actually say, why food and coffee count, how much the number varies between people, and when in a Gulf summer it genuinely matters.
Sep 6, 2026
Health
Six Breaths a Minute Is the Number, and It Is One of the Few Wellness Claims With Trials Behind It
Yogic breathing is unusual among wellness practices in having a measurable, replicated physiological effect. The size of it is modest, the mechanism is well understood, and a few of the more dramatic techniques carry real risk.
Sep 4, 2026
