Calculated Mean Content Values
| Units |
Average |
Min |
Max |
Standard Deviation |
| mg/100 ml |
4.99 |
0.06 |
17.50 |
6.55 |
| mol/100 ml |
1.13e-05 |
1.36e-07 |
3.96e-05 |
1.48e-05 |
Values calculated by aggregating data from 16
different samples
from
5 unique
publications.
Aglycone Mean Content Values
| Aglycone |
Units |
Average |
Min |
Max |
Standard Deviation |
| (-)-Epicatechin |
mg/100 ml |
3.27 |
0.04 |
11.48 |
4.30 |
| mol/100 ml |
7.40e-06 |
8.90e-08 |
2.60e-05 |
9.71e-06 |
| Gallic acid |
mg/100 ml |
1.92 |
0.02 |
6.73 |
2.52 |
| mol/100 ml |
4.34e-06 |
5.22e-08 |
1.52e-05 |
5.69e-06 |
Original Content Values Used to Produce Means
Lin, J.K.;Lin, C.L.;Liang, Y.C.;Lin-Shiau, S.Y.;Juan, I.M. (1998) Survey of catechins, gallic acid, and methylxanthines in green, oolong, pu-erh and black teas. Journal of Agricultural and Food Chemistry 46:3635-3642
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
0.09 mg/100 ml
|
Chinese oolong and paochong commercial tea - Fu-Chien An-Hsi Tieh-Kuan-Yin |
no |
1 |
|
0.10 mg/100 ml
|
Chinese oolong and paochong commercial tea - Fu-Chien (Shen-Chun) An-Hsi Tieh-Kuan-Yin |
no |
1 |
|
0.06 mg/100 ml
|
Chinese oolong and paochong commercial tea - Fu-Chien Yu-San Tieh-Kuan-Yin |
no |
1 |
|
9.70 mg/100 ml
|
Chinese oolong and paochong commercial tea - Fu-Chien Oolong |
no |
1 |
|
0.06 mg/100 ml
|
Chinese oolong and paochong commercial tea - Fu-Chien Wun-Yi Oolong |
no |
1 |
|
0.06 mg/100 ml
|
Chinese oolong and paochong commercial tea - Fu-Chien An-Chi Tieh Kuan-Yin |
no |
1 |
|
0.12 mg/100 ml
|
Chinese oolong and paochong commercial tea - An-Hui Huang-Shan Mao-Feng |
no |
1 |
|
0.08 mg/100 ml
|
Chinese oolong and paochong commercial tea - Ping-Lin, Taipei, Paochong |
no |
1 |
|
0.06 mg/100 ml
|
Chinese oolong and paochong commercial tea - Ping-Lin, Taipei, Oolong |
no |
1 |
Lee, B.-L.; Ong, C.-N. (2000) Comparative analysis of tea catechins ans theaflavins by high-performance liquid chromatography and capillary electrophoresis. Journal of Chromatography A 881:439-447
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
3.35 mg/100 ml
|
Iron Buddha |
no |
1 |
|
3.58 mg/100 ml
|
Oolong tea |
no |
1 |
Kuhr, S.; Engelhardt, U.H. (1991) Determination of flavanols, theogallin. Zeitschrift fuer Lebensmittel Untersuchung und Forschung 192:526-529 PubMed (8717094)
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
2.85 mg/100 ml
|
Oolong tea infusion, Taiwan, Leaf |
no |
1 |
|
12.52 mg/100 ml
|
Oolong tea infusion, China, Leaf |
no |
1 |
Lin Y., Juan I., Chen Y., Liang Y., Lin J. (1996) Composition of polyphenols in fresh tea leaves and associations of their oxygen-radical-absorbing capacity with antiproliferative actions in fibroblast cells. Journal of Agricultural and Food Chemistry 44:1387-1394
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
17.50 mg/100 ml
|
Paochung tea infusion, TTE 12 |
no |
1 |
|
12.50 mg/100 ml
|
Paochung tea infusion, Wun-Yi |
no |
1 |
Kilmartin P.A., Chyong F.H. (2003) Characterisation of polyphenols in green, oolong, and black teas, and in coffee, using cyclic voltammetry. Food Chemistry 82:501-512
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
17.20 mg/100 ml
|
Oolong tea - Infusion - 100°C |
no |
1 |