2 claim verifications about caffeine caffeine ×
“Taking caffeine before a period of sleep deprivation can fully restore social memory function that would otherwise be impaired.”
A 2026 peer-reviewed study did show caffeine reversed social memory deficits in male mice via a specific hippocampal CA2 mechanism. However, the claim's unqualified language — "fully restore social memory function" — overgeneralizes from a single animal model and one narrow social-recognition assay. No human evidence confirms this effect. Broader research shows caffeine often only partially rescues cognition under sleep deprivation and can disrupt recovery sleep. The core finding is real but the claim's framing is misleading.
“Drinking coffee causes dehydration in humans.”
This claim is false. The scientific consensus, supported by peer-reviewed meta-analyses and major health authorities like the NHS, is clear: moderate coffee consumption does not cause dehydration in healthy adults. Coffee's mild diuretic effect is transient and far outweighed by the water content of the beverage itself. The only studies showing negative fluid balance used extreme caffeine doses in caffeine-deprived subjects—conditions irrelevant to normal coffee drinking. Regular consumers develop tolerance to caffeine's diuretic effects.