Effects of quercetin on the apoptosis of the human gastric carcinoma cells

► Morphology changes treated with quercetin were determined by electron microscopy. ► The induced apoptosis and cell cycle were measured by flow cytometry. ► Quercetin changed the expression of the apoptotic protein. ► Quercetin induced apoptosis and change the cell cycle distribution in BGC-823 cell. ► Apoptosis is mediated via the mitochondrial pathway.