The NUS Medicine study, published in Neuropsychopharmacology, used laboratory rodents subjected to five hours of sleep deprivation followed by seven days of ad libitum caffeine in drinking water. Electrophysiological recordings on hippocampal slices revealed restored long-term potentiation specifically in the CA2 subfield, reversing social recognition deficits without global overstimulation in non-deprived controls. This animal work (methodology: acute sleep restriction plus chronic caffeine; sample size unspecified) demonstrates a selective adenosine-receptor mechanism rather than nonspecific arousal. Limitations include the rodent model’s uncertain translation to human social cognition, lack of dose-response data, and absence of long-term memory consolidation measures. The coverage underplays that prior human trials (e.g., a 2018 meta-analysis in Psychological Bulletin) show caffeine improves vigilance yet inconsistently aids episodic memory, while a 2023 Nature Reviews Neuroscience piece on CA2 circuits links this region to social deficits in schizophrenia—suggesting the Singapore findings may eventually inform targeted therapies beyond coffee. The original report also omits whether caffeine timing relative to sleep loss matters and whether chronic use alters adenosine receptor density.