The effects of digestion on pure quercetin and quercetin-3-glucoside and quercetin and quercetin-3-glucoside from apple and onion. Each point represents the mean ± standard deviation of triplicate observations within the same experiment. An asterisk indicates a significant difference between the control and the digestate (p < 0.05).
Boyer et al. Nutrition Journal 2005 4:1 doi:10.1186/1475-2891-4-1