This study aims to evaluate the potential of ethanol extract of putat leaves (Barringtonia acutangula) in stimulating the growth of probiotic Bifidobacterium longum and test its ability to inhibit the growth of pathogenic Escherichia coli bacteria. Bifidobacterium longum is one of the lactic acid bacteria that are beneficial for human gut health, while E. coli bacteria are known as opportunistiā¦