Calculated Mean Content Values

Units Average Min Max Standard Deviation
mg/100 g FW 12.65 2.81 46.32 8.03
mol/100 g 4.19e-05 9.30e-06 1.53e-04 2.66e-05

Values calculated by aggregating data from 84 different samples from 6 unique publications.

Aglycone Mean Content Values

Aglycone Units Average Min Max Standard Deviation
Quercetin mg/100 g FW 12.65 2.81 46.32 8.03
mol/100 g 4.19e-05 9.30e-06 1.53e-04 2.66e-05

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
34.00 mg/100 g FW Onion - Yellow yes 5
Mattila, P.;Astola, J.;Kumpulainen, J. (2000) Determination of flavonoids in plant material by HPLC with diode-array and electro-array detections. Journal of Agricultural and Food Chemistry 48:5834-41. PubMed (11312761)
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
19.20 mg/100 g FW Yellow onion - Supermarkets yes 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
28.64 mg/100 g FW Yellow onion - Skinned - Sweet Savannah no 5
28.62 mg/100 g FW Yellow onion - Skinned - 4128 no 5
21.42 mg/100 g FW Yellow onion - Skinned - XPH6068 no 5
20.72 mg/100 g FW Yellow onion - Skinned - XPH6023 no 5
17.92 mg/100 g FW Yellow onion - Skinned - 4101 no 5
17.52 mg/100 g FW Yellow onion - Skinned - 4157 no 5
15.91 mg/100 g FW Yellow onion - Skinned - 4122 no 5
15.73 mg/100 g FW Yellow onion - Skinned - XPH6022 no 5
15.32 mg/100 g FW Yellow onion - Skinned - 4144 no 5
15.03 mg/100 g FW Yellow onion - Skinned - TG1015Y no 5
15.02 mg/100 g FW Yellow onion - Skinned - XPH6028 no 5
15.01 mg/100 g FW Yellow onion - Skinned - 20275G no 5
14.61 mg/100 g FW Yellow onion - Skinned - 20277G no 5
14.52 mg/100 g FW Yellow onion - Skinned - 4155 no 5
14.12 mg/100 g FW Yellow onion - Skinned - 4018 no 5
14.02 mg/100 g FW Yellow onion - Skinned - TG502 no 5
13.92 mg/100 g FW Yellow onion - Skinned - Granex33 no 5
13.82 mg/100 g FW Yellow onion - Skinned - Granex429 no 5
13.72 mg/100 g FW Yellow onion - Skinned - 20270G no 5
13.71 mg/100 g FW Yellow onion - Skinned - 4143 no 5
13.62 mg/100 g FW Yellow onion - Skinned - 4130 no 5
13.63 mg/100 g FW Yellow onion - Skinned - 4141 no 5
13.51 mg/100 g FW Yellow onion - Skinned - 4120 no 5
12.75 mg/100 g FW Yellow onion - Skinned - 20272G no 5
12.61 mg/100 g FW Yellow onion - Skinned - 4143 no 5
12.41 mg/100 g FW Yellow onion - Skinned - 4149 no 5
12.32 mg/100 g FW Yellow onion - Skinned - Henry special no 5
11.94 mg/100 g FW Yellow onion - Skinned - 4146 no 5
11.62 mg/100 g FW Yellow onion - Skinned - 4122 no 5
11.11 mg/100 g FW Yellow onion - Skinned - 20303G no 5
11.02 mg/100 g FW Yellow onion - Skinned - 20291G no 5
10.82 mg/100 g FW Yellow onion - Skinned - 20274G no 5
10.71 mg/100 g FW Yellow onion - Skinned - 4127 no 5
10.52 mg/100 g FW Yellow onion - Skinned - 4124 no 5
10.01 mg/100 g FW Yellow onion - Skinned - 0001 no 5
9.81 mg/100 g FW Yellow onion - Skinned - 20288G no 5
9.61 mg/100 g FW Yellow onion - Skinned - 20276G no 5
9.53 mg/100 g FW Yellow onion - Skinned - 20280G no 5
9.52 mg/100 g FW Yellow onion - Skinned - TG502 no 5
9.41 mg/100 g FW Yellow onion - Skinned - 20290G no 5
9.32 mg/100 g FW Yellow onion - Skinned - 4135 no 5
8.71 mg/100 g FW Yellow onion - Skinned - 20301G no 5
8.67 mg/100 g FW Yellow onion - Skinned - Rio Bravo no 5
8.51 mg/100 g FW Yellow onion - Skinned - 20253G no 5
8.12 mg/100 g FW Yellow onion - Skinned - 20330G no 5
8.01 mg/100 g FW Yellow onion - Skinned - Vidalia no 5
7.71 mg/100 g FW Yellow onion - Skinned - 20263G no 5
7.62 mg/100 g FW Yellow onion - Skinned - 20316G no 5
7.43 mg/100 g FW Yellow onion - Skinned - 20338G no 5
7.41 mg/100 g FW Yellow onion - Skinned - 20251G no 5
7.11 mg/100 g FW Yellow onion - Skinned - 20305G no 5
7.01 mg/100 g FW Yellow onion - Skinned - 20259G no 5
6.81 mg/100 g FW Yellow onion - Skinned - 20249G no 5
5.61 mg/100 g FW Yellow onion - Skinned - 20257G no 5
5.43 mg/100 g FW Yellow onion - Skinned - 4145 no 5
Patil B.S., Pike L.M., Hamilton B.K. (1995) Changes in quercetin concentration in onion (Allium cepa L.) owing to location, growth stage and soil type. New Phytologist 130:349-355
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
4.34 mg/100 g FW Onion - Skinned - TG1015Y (yellow) - Field 1 - 9 March no 1
8.15 mg/100 g FW Onion - Skinned - TG1015Y (yellow) - Field 1 - 23 March no 1
2.81 mg/100 g FW Onion - Skinned - TG1015Y (yellow) - Field 1 - 1 April no 1
2.81 mg/100 g FW Onion - Skinned - TG1015Y (yellow) - Field 1 - 14 April no 1
4.14 mg/100 g FW Onion - Skinned - TG1015Y (yellow) - Field 1 - 21 April no 1
5.75 mg/100 g FW Onion - Skinned - TG1015Y (yellow) - Field 2 - 9 March no 1
6.95 mg/100 g FW Onion - Skinned - TG1015Y (yellow) - Field 2 - 23 March no 1
3.60 mg/100 g FW Onion - Skinned - TG1015Y (yellow) - Field 2 - 1 April no 1
3.39 mg/100 g FW Onion - Skinned - TG1015Y (yellow) - Field 2 - 14 April no 1
4.64 mg/100 g FW Onion - Skinned - TG1015Y (yellow) - Field 2 - 21 April no 1
Sellappan S., Akoh C.C. (2002) Flavonoids and antioxidant capacity of Georgia-grown Vidalia onions. Journal of Agricultural and Food Chemistry 50:5338-5342 PubMed (12207471)
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
16.62 mg/100 g FW Vidalia onion (yellow) - Skinned - Nirvana no 1
46.32 mg/100 g FW Vidalia onion (yellow) - Skinned - DPS 1032 no 1
43.36 mg/100 g FW Vidalia onion (yellow) - Skinned - Yellow 2025 no 1
8.57 mg/100 g FW Vidalia onion (yellow) - Skinned - King-Midas no 1
7.70 mg/100 g FW Vidalia onion (yellow) - Skinned - SBO 133 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
12.12 mg/100 g FW Yellow onion - TG1015Y - Outermost rings no 1
4.54 mg/100 g FW Yellow onion - TG1015Y - Middle rings no 1
3.12 mg/100 g FW Yellow onion - TG1015Y - Remaining rings no 1
20.23 mg/100 g FW Yellow onion - TG502GB - Outermost rings no 1
9.88 mg/100 g FW Yellow onion - TG502GB - Middle rings no 1
5.58 mg/100 g FW Yellow onion - TG502GB - Remaining rings no 1
32.47 mg/100 g FW Yellow onion - TG502ST - Outermost rings no 1
13.90 mg/100 g FW Yellow onion - TG502ST - Middle rings no 1
8.99 mg/100 g FW Yellow onion - TG502ST - Remaining rings no 1
18.48 mg/100 g FW Yellow onion - XPH6028 - Outermost rings no 1
7.14 mg/100 g FW Yellow onion - XPH6028 - Middle rings no 1
4.79 mg/100 g FW Yellow onion - XPH6028 - Remaining rings no 1