Traceable
Key statistics link to a source.
How we keep
claims honest.
We start with strong sources, show the limits, and never turn uncertainty into a promise.
Readers can move from a claim to its supporting source.
Calibrated
Association is not presented as causation.
Non-clinical
Tools do not diagnose or prescribe.
Core reference library
Gut–brain and serotoninPeer-reviewed reviewMicrobial cell estimatesPLOS BiologyPhysical activityWorld Health OrganizationSleep durationCenters for Disease Control and PreventionNutrition patternsDietary Guidelines for AmericansSupplement ingredientsNIH Office of Dietary SupplementsProbiotic safetyNCCIH
Last reviewed: July 2026
Health guidance changes. Source dates and study designs matter; readers should follow links and consult qualified professionals for personal decisions.