Calculated Mean Content Values

Units Average Min Max Standard Deviation
mg/100 g FW 0.28 1.00e-02 11.17 2.27
mol/100 g 9.31e-07 3.31e-08 3.70e-05 7.53e-06

Values calculated by aggregating data from 78 different samples from 7 unique publications.

Aglycone Mean Content Values

Aglycone Units Average Min Max Standard Deviation
Quercetin mg/100 g FW 0.28 1.00e-02 11.17 2.27
mol/100 g 9.31e-07 3.31e-08 3.70e-05 7.53e-06

Original Content Values Used to Produce Means

Price, K.R.;Rhodes, M.J.C. (1997) Analysis of the major flavonol glycosides present in four varieties of Onion (Allium cepa) and changes in composition resulting from autolysis. Journal of the Science of Food and Agriculture 74:331-339
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
3.90 mg/100 g FW Brown onion - Skinned - Rijnsburger no 5
Makris D.P., Rossiter J.T. (2001) Domestic processing of onion bulbs (Allium cepa) and asparagus spears (Asparagus officinalis): effect on flavonol content and antioxidant status. Journal of Agricultural and Food Chemistry 49:3216-3222 PubMed (11453754)
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
0.38 mg/100 g FW Orange onion bulb - Allium cepa - Skinned - Control for chopping no 4
0.14 mg/100 g FW Orange onion bulb - Allium cepa - Skinned - Control for boiling no 4
Kiviranta J., Huovinen K., Hiltunen R. (1988) Variation of the phenolic substances in onion. Acta Pharmaceutica Fennica 97:67-72
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
1.00 mg/100 g FW Yellow onion - Edible portion no 1
Marotti M., Piccaglia R. (2002) Characterization of flavonoids in different cultivars of onion (Allium cepa L.). Journal of Food Science 67:1229-1232 PubMed (20949919)
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
5.59 mg/100 g FW Golden onion - Skinned - Festival no 1
6.65 mg/100 g FW Golden onion - Skinned - Tamara no 1
11.17 mg/100 g FW Golden onion - Skinned - Daytona no 1
9.54 mg/100 g FW Golden onion - Skinned - Dorata Density no 1
6.50 mg/100 g FW Golden onion - Skinned - Castillo no 1
9.23 mg/100 g FW Golden onion - Skinned - Santana no 1
Patil B.S., Pike L.M., Kil Sun Y. (1995) Variation in the quercetin content in different colored onions (Allium cepa L.). Journal of the American Society for Horticultural Science 120:909-913
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
0.01 mg/100 g FW Yellow onion - Skinned - 20277G no 5
0.02 mg/100 g FW Yellow onion - Skinned - 4155 no 5
0.02 mg/100 g FW Yellow onion - Skinned - 4018 no 5
0.02 mg/100 g FW Yellow onion - Skinned - TG502 no 5
0.02 mg/100 g FW Yellow onion - Skinned - Granex33 no 5
0.02 mg/100 g FW Yellow onion - Skinned - Granex429 no 5
0.02 mg/100 g FW Yellow onion - Skinned - 20270G no 5
0.01 mg/100 g FW Yellow onion - Skinned - 4143 no 5
0.02 mg/100 g FW Yellow onion - Skinned - 4130 no 5
0.03 mg/100 g FW Yellow onion - Skinned - 4141 no 5
0.01 mg/100 g FW Yellow onion - Skinned - 4120 no 5
1.25 mg/100 g FW Yellow onion - Skinned - 20272G no 5
0.01 mg/100 g FW Yellow onion - Skinned - 4143 no 5
0.01 mg/100 g FW Yellow onion - Skinned - 4149 no 5
0.02 mg/100 g FW Yellow onion - Skinned - Henry special no 5
0.04 mg/100 g FW Yellow onion - Skinned - 4146 no 5
0.02 mg/100 g FW Yellow onion - Skinned - 4122 no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20303G no 5
0.02 mg/100 g FW Yellow onion - Skinned - 20291G no 5
0.02 mg/100 g FW Yellow onion - Skinned - 20274G no 5
0.01 mg/100 g FW Yellow onion - Skinned - 4127 no 5
0.02 mg/100 g FW Yellow onion - Skinned - 4124 no 5
0.01 mg/100 g FW Yellow onion - Skinned - 0001 no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20288G no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20276G no 5
0.03 mg/100 g FW Yellow onion - Skinned - 20280G no 5
0.02 mg/100 g FW Yellow onion - Skinned - TG502 no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20290G no 5
0.02 mg/100 g FW Yellow onion - Skinned - 4135 no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20301G no 5
0.01 mg/100 g FW Yellow onion - Skinned - Rio Bravo no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20253G no 5
0.02 mg/100 g FW Yellow onion - Skinned - 20330G no 5
0.01 mg/100 g FW Yellow onion - Skinned - Vidalia no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20263G no 5
0.02 mg/100 g FW Yellow onion - Skinned - 20316G no 5
0.03 mg/100 g FW Yellow onion - Skinned - 20338G no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20251G no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20305G no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20259G no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20249G no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20257G no 5
0.03 mg/100 g FW Yellow onion - Skinned - 4145 no 5
0.02 mg/100 g FW Yellow onion - Skinned - Sweet Savannah no 5
0.04 mg/100 g FW Yellow onion - Skinned - 4128 no 5
0.02 mg/100 g FW Yellow onion - Skinned - XPH6068 no 5
0.02 mg/100 g FW Yellow onion - Skinned - XPH6023 no 5
0.02 mg/100 g FW Yellow onion - Skinned - 4101 no 5
0.02 mg/100 g FW Yellow onion - Skinned - 4157 no 5
0.01 mg/100 g FW Yellow onion - Skinned - 4122 no 5
0.03 mg/100 g FW Yellow onion - Skinned - XPH6022 no 5
0.02 mg/100 g FW Yellow onion - Skinned - 4144 no 5
0.03 mg/100 g FW Yellow onion - Skinned - TG1015Y no 5
0.02 mg/100 g FW Yellow onion - Skinned - XPH6028 no 5
0.01 mg/100 g FW Yellow onion - Skinned - 20275G no 5
Price K.R., Bacon J.R., Rhodes M.J.C. (1997) Effect of storage and domestic processing on the content and composition of flavonol glucosides in onion (Allium cepa). Journal of Agricultural and Food Chemistry 45:938-942
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
2.90 mg/100 g FW Brown onion - Skinned - Stored 0 days - Crow Bow no 1
Patil B.S., Pike L.M. (1995) Distribution of quercetin content in different rings of various coloured onion (Allium cepa L.) cultivars. Journal of Horticultural Science and Biotechnology 70:643-650
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
0.05 mg/100 g FW Yellow onion - TG1015Y - Outermost rings no 1
0.03 mg/100 g FW Yellow onion - TG1015Y - Middle rings no 1
0.02 mg/100 g FW Yellow onion - TG1015Y - Remaining rings no 1
0.36 mg/100 g FW Yellow onion - TG502GB - Outermost rings no 1
0.17 mg/100 g FW Yellow onion - TG502GB - Middle rings no 1
0.02 mg/100 g FW Yellow onion - TG502GB - Remaining rings no 1
0.46 mg/100 g FW Yellow onion - TG502ST - Outermost rings no 1
0.03 mg/100 g FW Yellow onion - TG502ST - Middle rings no 1
0.02 mg/100 g FW Yellow onion - TG502ST - Remaining rings no 1
0.25 mg/100 g FW Yellow onion - XPH6028 - Outermost rings no 1
0.03 mg/100 g FW Yellow onion - XPH6028 - Middle rings no 1
0.02 mg/100 g FW Yellow onion - XPH6028 - Remaining rings no 1