Vitaglione P., Donnarumma G., Napolitano A., Galvano F., Gallo A., Scalfi L., Fogliano V. (2007) Protocatechuic acid is the major human metabolite of cyanidin-glucosides. J Nutr 137:2043-8 PubMed (17709440)

Plasma and Urine analysed without enzymatic deconjugation

Plasma Concentration (nmol/L)
Number Dose Multiple Dose Duration Time (hours) Metabolite
0 0.5 1 2 4 6
1 1 L Single Dose 0 1.9 1.5 1.1 1.05 1.05
Cyanidin 3-O-glucoside
2 1 L Single Dose 0 190 420 492 300 75
Protocatechuic acid
L)&chxp=1,50|3,50&chd=t:0.0,0.5,1.0,2.0,4.0,6.0|0.0,1.9,1.5,1.1,1.05,1.05|0.0,0.5,1.0,2.0,4.0,6.0|0.0,190.0,420.0,492.0,300.0,75