Calculated Mean Content Values

Units Average Min Max Standard Deviation
mg/100 ml 1.62 0.00 4.87 1.12
mol/100 ml 2.66e-06 0.00 7.98e-06 1.83e-06

Values calculated by aggregating data from 19 different samples from 3 unique publications.

Aglycone Mean Content Values

Aglycone Units Average Min Max Standard Deviation
Quercetin mg/100 ml 0.80 0.00 2.41 0.55
mol/100 ml 1.32e-06 0.00 3.95e-06 9.06e-07

Original Content Values Used to Produce Means

Price, K.R.; Rhodes, M.J.C.; Barnes, K.A. (1998) Flavonol glycoside content and composition of tea infusions made from commercially available teas and tea products. Journal of Agricultural and Food Chemistry 46:2517-2522
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
2.38 mg/100 ml Black tea blend 1 no 1
0.00 mg/100 ml Black tea Keemun no 1
2.08 mg/100 ml Black tea blend 2 no 1
3.35 mg/100 ml Black tea blend 3 no 1
2.97 mg/100 ml Black tea blend 4 no 1
4.87 mg/100 ml Black tea blend 5 no 1
1.98 mg/100 ml Black tea Lapsang souchong no 1
0.60 mg/100 ml Black tea Ceylon no 1
1.13 mg/100 ml Black tea Assam no 1
3.13 mg/100 ml Black tea Njuno no 1
1.96 mg/100 ml Black tea Darjeeling no 1
Rechner, A.R.; Wagner, E.; Buren van, L.; Put van de, F.; Wiseman, S.; Rice-Evans, C.A. (2002) Black tea represents a major source of dietary phenolics among regular tea drinkers. Free radical research 36:1127-1135
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
1.48 mg/100 ml Black tea infusion brand 1 no 3
1.10 mg/100 ml Black tea infusion brand 5 no 3
1.42 mg/100 ml Black tea infusion brand 6 no 3
1.38 mg/100 ml Black tea infusion brand 7 no 3
1.53 mg/100 ml Black tea infusion brand 2 no 3
1.13 mg/100 ml Black tea infusion brand 3 no 3
1.07 mg/100 ml Black tea infusion brand 4 no 3
Stewart A.J., Mullen W., Crozier A. (2005) On-line high-performance liquid chromatography analysis of the antioxidant activity of phenolic compounds in green and black tea. Molecular Nutrition and Food Research 49:52-60 PubMed (15602765)
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
1.77 mg/100 ml Black tea infusion no 1