Ph value (a) and concentrations of total short-chain fatty acid (B) after incubation in vitro with Yan 73 anthocyanin extracts, malvidin-3-O-glucoside, spine grape anthocyanin extracts, and malvidin-3,5-O-diglucoside, respectively. YA, M3G, SA, and M35G represent Yan 73 anthocyanin extracts, malvidin-3-O-glucoside, spine grape anthocyanin extracts, and malvidin-3,5-O-diglucoside, respectively. Results are given as the mean ± SD in each group. Values with different letters (a-c) are significantly different (p < 0.05).