Similar brain protection from raw and ripened Pu-erh tea in aging mice through the gut-brain connection

In a mouse aging model, both raw and ripened Pu-erh tea similarly reduced cognitive and hippocampal damage through gut microbiota and sphingolipid-related changes.

This preclinical experiment in D-galactose-induced aging mice gave ad libitum raw or ripened Pu-erh tea infusions and found comparable improvements in cognition and hippocampal injury, reversal of gut dysbiosis, restoration of sphingolipid metabolism, and reductions in cerebral ceramide and Aβ deposition despite different active polyphenol profiles.

Because the findings come from a D-galactose mouse model rather than human trials, they suggest a possible mechanism and benefit but do not establish effectiveness in people.