Purification and anti-tumour activity of cyanidin-3-O-glucoside from Chinese bayberry fruit

► Purified bayberry C3G showed inhibition effect on three gastric cancer cells. ► The anti-tumour effects of purified bayberry C3G were in dose-dependent manners. ► C3G content, DPPH
- scavenging, and anti-tumour activities were highly correlated. ► Inhibition of cell invasion and metastasis by reducing MMP-2 level was proposed.