A new nasal spray reversed signs of brain aging and restored memory performance in preclinical trials, and it worked in just weeks. Scientists at Texas A&M University have unveiled an experimental nasal spray that appears to reverse key markers of brain aging. The therapy targets neuroinflammaging, the chronic, low-level inflammation deep in the brain’s memory center that slowly degrades cognitive function and increases the risk for conditions like Alzheimer’s disease. By delivering microscopic biological packages known as extracellular vesicles directly into the nasal passages, the treatment bypasses the blood-brain barrier without requiring surgical or invasive procedures . In preclinical trials, just two doses spaced two weeks apart produced results within weeks, calming hyperactive immune cells, restoring neuronal cellular energy, and boosting memory performance for several months. While human clinical trials are still needed to confirm these findings in patients, the observations indicate that age-related mental decline may not be an irreversible fate. Researchers hope this accessible approach could one day offer a simple, non-invasive alternative to complex neurological treatments and prolonged medications. [Madhu, L. N., Kodali, M., Rao, S., et al. (2026). Intranasal human NSC-derived EVs therapy can restrain inflammatory microglial transcriptome, and NLRP3 and cGAS-STING signalling, in aged hippocampus. Journal of Extracellular Vesicles, 15(2). DOI: 10.1002/jev2.70232]