Calculated Mean Content Values
| Units |
Average |
Min |
Max |
Standard Deviation |
| mg/100 ml |
14.01 |
0.00 |
59.20 |
14.55 |
| mol/100 ml |
4.58e-05 |
0.00 |
1.93e-04 |
4.75e-05 |
Values calculated by aggregating data from 29
different samples
from
6 unique
publications.
Aglycone Mean Content Values
| Aglycone |
Units |
Average |
Min |
Max |
Standard Deviation |
| (+)-Gallocatechin |
mg/100 ml |
14.01 |
0.00 |
59.20 |
14.55 |
| mol/100 ml |
4.58e-05 |
0.00 |
1.93e-04 |
4.75e-05 |
Original Content Values Used to Produce Means
Arts, I.C.W. ; van de Putte, B.;Hollman, P.C.H. (2000) Catechin Contents of Foods Commonly Consumed in The Netherlands. 2. Tea, Wine, Fruit juices and chocolate milk. Journal of Agricultural and Food Chemistry 48:1752-1757 PubMed (10820090)
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
0.89 mg/100 ml
|
Black Tea Infusion - English Melange - Albert Heijn |
no |
1 |
|
0.56 mg/100 ml
|
Black Tea Infusion - English Melange - Pickwick DE |
no |
1 |
|
2.61 mg/100 ml
|
Black Tea Infusion - Ceylon - Albert Heijn |
no |
1 |
|
2.78 mg/100 ml
|
Black Tea Infusion - Ceylon - Pickwick DE |
no |
1 |
|
0.61 mg/100 ml
|
Black Tea Infusion - Earl Grey - Albert Heijn |
no |
1 |
|
0.70 mg/100 ml
|
Black Tea Infusion - Earl Grey - Pickwick DE |
no |
1 |
|
1.05 mg/100 ml
|
Black Tea Infusion - Lemon Melange - Pickwick DE |
no |
1 |
|
0.89 mg/100 ml
|
Black Tea - Forest fruit melange - Pickwick DE |
no |
1 |
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 |
|
2.08 mg/100 ml
|
Black tea infusion |
no |
3 |
Liang, Y.; Lu, J.; Zhang, L.; Wu, S.; Wu, Y. (2003) Estimation of black tea quality by analysis of chemical composition and colour difference of tea infusion. Food Chemistry 80:283-290
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
15.18 mg/100 ml
|
China black tea 2 |
no |
1 |
|
13.72 mg/100 ml
|
China black tea 3 |
no |
1 |
|
11.62 mg/100 ml
|
China black tea 4 |
no |
1 |
|
22.80 mg/100 ml
|
China black tea 5 |
no |
1 |
|
23.00 mg/100 ml
|
China black tea 6 |
no |
1 |
|
21.60 mg/100 ml
|
China black tea 7 |
no |
1 |
|
31.60 mg/100 ml
|
China black tea 8 |
no |
1 |
|
59.20 mg/100 ml
|
China black tea 1 |
no |
1 |
|
25.20 mg/100 ml
|
China black tea 9 |
no |
1 |
|
28.20 mg/100 ml
|
China black tea 10 |
no |
1 |
|
34.80 mg/100 ml
|
China black tea 11 |
no |
1 |
|
22.60 mg/100 ml
|
China black tea 12 |
no |
1 |
|
29.40 mg/100 ml
|
China black tea 13 |
no |
1 |
|
14.40 mg/100 ml
|
China black tea 14 |
no |
1 |
|
14.72 mg/100 ml
|
China black tea 15 |
no |
1 |
|
21.60 mg/100 ml
|
China black tea 16 |
no |
1 |
|
28.40 mg/100 ml
|
China black tea 17 |
no |
1 |
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
|
Black Tea infusion 1 (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, Suntory,Japan |
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 |
|
0.00 mg/100 ml
|
Black tea infusion |
no |
1 |