Pterostilbene Improves Cognitive Performance in Aged Rats: An In Vivo Study
Joseph JA, Fisher DR, Cheng V, Rimando AM, Shukitt-Hale B
Published in Journal of Agricultural and Food Chemistry
Abstract
Study showing pterostilbene supplementation reversed age-related cognitive deficits in rats through enhanced dopamine release and improved neuronal signaling, suggesting neuroprotective benefits.
Methodology
Controlled animal experiment in aged rats fed pterostilbene-supplemented diets, with working memory testing and ex vivo assessment of dopamine release and neuronal signalling in striatal tissue.
Key Findings
Pterostilbene-fed aged rats performed better on working memory tasks than controls, and improvement correlated with hippocampal pterostilbene levels and enhanced dopamine release. Effects were dose-dependent and specific to pterostilbene rather than total anthocyanin intake.
Conclusions
Pterostilbene reversed some age-related cognitive and dopaminergic decline in rodents, supporting further investigation, but provides no direct evidence of cognitive benefit in humans.
Limitations
Rodent study only, small group sizes, short duration, dietary doses far above typical human intake, and cognitive endpoints that do not translate directly to human memory.
Supplements Studied
Pterostilbene-fed aged rats performed better on working memory tasks than controls, and improvement correlated with hippocampal pterostilbene levels and enhanced dopamine release. Effects were dose-dependent and specific to pterostilbene rather than total anthocyanin intake.
Study Details
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