Calculated Mean Content Values

Units Average Min Max Standard Deviation
mg/100 ml 2.26 0.00 15.69 4.10
mol/100 ml 7.38e-06 0.00 5.12e-05 1.34e-05

Values calculated by aggregating data from 14 different samples from 5 unique publications.

Aglycone Mean Content Values

Aglycone Units Average Min Max Standard Deviation
(+)-Gallocatechin mg/100 ml 2.26 0.00 15.69 4.10
mol/100 ml 7.38e-06 0.00 5.12e-05 1.34e-05

Original Content Values Used to Produce Means

Pascual-Teresa de, S.; Santos-Buelga, C.; Rivas-Gonzalo, J.C. (2000) Quantitative analysis of flavan-3-ols in Spanish foodstuffs and beverages. Journal of Agricultural and Food Chemistry 48:5331-5337 PubMed (11087482)
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
3.07 mg/100 ml Green tea infusion no 3
Pelillo, M.; Biguzzi, B.; Bendini, A.; Gallina Toschi, T.; Vanzini, M.; Lercker, G. (2002) Preliminary investigation into development of HPLC with UV and MS-electrospray detection for the analysis of tea catechins. Food Chemistry 78:369-374
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
0.00 mg/100 ml Green Tea infusion 4 (whole leaves) no 1
0.00 mg/100 ml Green Tea infusion 5 (minced leaves) no 1
Long, H.; Zhu, Y.; Huang, T.; Coury, L.A.; Kissinger, P.T. (2001) Identification and determination of polyphenols in tea by liquid chromatography with multichannel electrochemical detection. Journal of Liquid Chromatography and Related Technologies 24:1105-1114
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
0.00 mg/100 ml Green tea infusion, Longjin, China no 1
0.15 mg/100 ml Green tea infusion, Luan Guapian, China no 1
0.00 mg/100 ml Black tea infusion, Hoji-cha, Japan no 1
0.00 mg/100 ml Green tea infusion, Dynasty, Japan no 1
0.70 mg/100 ml Green tea infusion, Maofeng, China no 1
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
15.69 mg/100 ml Green tea infusion no 1
Wang H., Helliwell K., You X. (2000) Isocratic elution system for the determination of catechins, caffeine and gallic acid in green tea using HPLC. Food Chemistry 68:115-121
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
2.57 mg/100 ml Green tea infusion - Gunpowder no 1
3.05 mg/100 ml Green tea infusion - Roasted green tea no 1
2.81 mg/100 ml Green tea infusion - Sencha no 1
0.40 mg/100 ml Green tea infusion - Keemun no 1
1.57 mg/100 ml Green tea infusion - Sri Lanka no 1