Calculated Mean Content Values

Units Average Min Max Standard Deviation
mg/100 g FW 1.78 0.00 3.70 1.75
mol/100 g 5.89e-06 0.00 1.22e-05 5.79e-06

Values calculated by aggregating data from 4 different samples from 3 unique publications.

Aglycone Mean Content Values

Aglycone Units Average Min Max Standard Deviation
Quercetin mg/100 g FW 1.78 0.00 3.70 1.75
mol/100 g 5.89e-06 0.00 1.22e-05 5.79e-06

Original Content Values Used to Produce Means

Justesen, U.;Knuthsen, P.;Leth, T. (1998) Quantitative analysis of flavonols, flavones, and flavanones in fruits, vegetables and beverages by high-performance liquid chromatography with photo-diode array and mass spectrometric detection. Journal of Chromatography A 799:101-10 PubMed (9550103)
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
3.70 mg/100 g FW Blue grape yes 2
Hertog, M. Hollman, P. Katan, M (1992) Content of potentially anticarcinogenic flavonoids of 28 vegetables and 9 fruits commonly consumed in the Netherland. Journal of Agricultural and Food Chemistry 40:2379-2383
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
1.50 mg/100 g FW Black grape - Vitis vinifera L. - Aug 1991 yes 1
Lugasi A., Hovari J. (2002) Flavonoid aglycons in foods of plant origin. II. Fresh and dried fruits. Acta Alimentaria 31:63-71
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
0.00 mg/100 g FW Grape - Cardinal no 1
0.00 mg/100 g FW Grape - Othello no 1