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

Excretion in Urine (nmol/mmol creatinine)
Number Dose Multiple Dose Duration Time (hours) Metabolite
0 2 4 6 12 24
1 1 L Single Dose 0 0.2 0.1 0.05 0 0
Cyanidin 3-O-(6''-malonyl-glucoside)
2 1 L Single Dose 0 1.5 1.1 0.8 0.5 0.25
Cyanidin 3-O-glucoside
Mmol+creatinine)&chxp=1,50|3,50&chd=t:0.0,2.0,4.0,6.0,12.0,24.0|0.0,0.2,0.1,0.05,0.0,0.0|0.0,2.0,4.0,6.0,12.0,24.0|0.0,1.5,1.1,0.8,0.5,0