Individual results may vary depending on constitution, health status, and other factors
L-theanine could alleviate the memory impairment of the aging mouse by upregulating janus kinase 2 (JAK2)/activator of transcription 3 (STAT3), M1 muscarinic cholinergic receptor (mAChR), and extracellular signal-regulated kinase (ERK) signaling (47)
We also found notable sex differences in the attrition or survival rate of BrdU-ir cells across time, with males showing reductions across time, and females showing no appreciable reduction in the density of BrdU-ir cells across the three weeks
Follow us on Twitter @Spacedotcom or on Facebook
Hu, J., et al
Editors note The study on which this article is based has been retracted due to wide-ranging concerns raised about the quality of the work after publication. The study authors issued a retraction statement published on September 23, 2025, in The BMJ Nutrition, Prevention & Health