Green tea has long been revered for its beneficial effects on memory, and Chinese researchers have now discovered that EGCG, (epigallocatechin-3 gallate) may improve cognitive function in by increasing the generation of new neurones (neurogenesis). EGCG treatment significantly increased the production of neural progenitor cells, in both in vitro and in vivo experiments. Mice fed EGCG were found to have improved object recognition and spatial memory. (Green tea epigallocatechin-3-gallate (EGCG) promotes neural progenitor cell proliferation and sonic hedgehog pathway activation during adult hippocampal neurogenesis. Mol Nutr Food Res. 2012 Aug;56(8):1292-303).