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 |