Calculated Mean Content Values
| Units |
Average |
Min |
Max |
Standard Deviation |
| mg/100 ml |
9.12 |
0.00 |
67.90 |
12.67 |
| mol/100 ml |
1.99e-05 |
0.00 |
1.48e-04 |
2.76e-05 |
Values calculated by aggregating data from 98
different samples
from
17 unique
publications.
Aglycone Mean Content Values
| Aglycone |
Units |
Average |
Min |
Max |
Standard Deviation |
| (-)-Epigallocatechin |
mg/100 ml |
6.09 |
0.00 |
45.37 |
8.47 |
| mol/100 ml |
1.33e-05 |
0.00 |
9.90e-05 |
1.85e-05 |
| Gallic acid |
mg/100 ml |
3.38 |
0.00 |
25.20 |
4.70 |
| mol/100 ml |
7.38e-06 |
0.00 |
5.50e-05 |
1.03e-05 |
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 |
|
9.00e-03 mg/100 ml
|
Pu-erh commercial tea - Yun-Nan Co. |
no |
1 |
|
4.00e-03 mg/100 ml
|
Pu-erh commercial tea - Tien-Jen-Ming-Cha |
no |
1 |
|
0.01 mg/100 ml
|
Pu-erh commercial tea - I-Pin-Tang Cha-Chuang |
no |
1 |
|
0.02 mg/100 ml
|
Pu-erh commercial tea - China Native & Animal I&E Corp. |
no |
1 |
|
0.00 mg/100 ml
|
Pu-erh commercial tea - San-Hua Cha-Hang |
no |
1 |
|
0.01 mg/100 ml
|
Pu-erh commercial tea - Tein-Hsiang-Ming-Cha |
no |
1 |
|
0.03 mg/100 ml
|
Pu-erh commercial tea - Shang-Mei Cha-Chuang |
no |
1 |
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 |
|
5.60 mg/100 ml
|
Black Tea Infusion - English Melange - Albert Heijn |
no |
1 |
|
2.72 mg/100 ml
|
Black Tea Infusion - English Melange - Pickwick DE |
no |
1 |
|
12.80 mg/100 ml
|
Black Tea Infusion - Ceylon - Albert Heijn |
no |
1 |
|
10.04 mg/100 ml
|
Black Tea Infusion - Ceylon - Pickwick DE |
no |
1 |
|
5.13 mg/100 ml
|
Black Tea Infusion - Earl Grey - Albert Heijn |
no |
1 |
|
4.37 mg/100 ml
|
Black Tea Infusion - Earl Grey - Pickwick DE |
no |
1 |
|
5.09 mg/100 ml
|
Black Tea Infusion - Lemon Melange - Pickwick DE |
no |
1 |
|
4.27 mg/100 ml
|
Black Tea - Forest fruit melange - Pickwick DE |
no |
1 |
Khokhar, S.; Magnusdottir, S.G.M. (2002) Total phenol, catechin, and caffeine contents of teas commonly consumed in the United Kingdom. Journal of Agricultural and Food Chemistry 50:565-570 PubMed (11804530)
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
3.90 mg/100 ml
|
Black tea PG Tips |
no |
1 |
|
2.70 mg/100 ml
|
Black tea Yorkshire |
no |
1 |
|
6.80 mg/100 ml
|
Black tea Yorkshire Gold |
no |
1 |
|
25.20 mg/100 ml
|
Black tea Ceylon |
no |
1 |
|
24.90 mg/100 ml
|
Black tea Darjeeling |
no |
1 |
|
6.20 mg/100 ml
|
Black tea Nilgiri |
no |
1 |
|
3.20 mg/100 ml
|
Black tea Yorkshire Tetley (decaffeinated) |
no |
1 |
|
4.40 mg/100 ml
|
Black tea Twinings |
no |
1 |
|
3.20 mg/100 ml
|
Black tea Twinings-Lapsang |
no |
1 |
|
4.40 mg/100 ml
|
Black tea Kenya |
no |
1 |
|
4.50 mg/100 ml
|
Black tea Pickwick |
no |
1 |
|
3.40 mg/100 ml
|
Black tea Earl Grey |
no |
1 |
Bronner, W.E.; Beecher, G.R. (1998) Method for determining the content of catechins in tea infusions by high-performance liquid chromatography. Journal of Chromatography A 805:137-142 PubMed (20109129)
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
12.00 mg/100 ml
|
Black tea infusion - 3 min |
no |
2 |
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 |
|
16.85 mg/100 ml
|
Chrysanthemum |
no |
1 |
|
0.30 mg/100 ml
|
Pu-erh |
no |
1 |
|
5.52 mg/100 ml
|
Ceylon tea |
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 |
|
1.35 mg/100 ml
|
Black tea infusion |
no |
3 |
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 |
|
19.70 mg/100 ml
|
Black tea infusion, Assam, Grounded |
no |
1 |
|
23.21 mg/100 ml
|
Black tea infusion, Assam, Leaf |
no |
1 |
|
47.92 mg/100 ml
|
Black tea infusion, Sikkim, Leaf |
no |
1 |
|
43.42 mg/100 ml
|
Black tea infusion, Darjeeling, Grounded |
no |
1 |
|
45.09 mg/100 ml
|
Black tea infusion, Darjeeling, Leaf |
no |
1 |
|
18.55 mg/100 ml
|
Black tea infusion, Sri Lanka, Grounded |
no |
1 |
|
18.20 mg/100 ml
|
Black tea infusion, Sri Lanka, Leaf |
no |
1 |
|
21.62 mg/100 ml
|
Black tea infusion, Kenya, Grounded |
no |
1 |
|
17.36 mg/100 ml
|
Black tea infusion, Soviet Union, Leaf |
no |
1 |
|
17.70 mg/100 ml
|
Black tea infusion, Anhui, Leaf |
no |
1 |
|
29.14 mg/100 ml
|
Black tea infusion, Java, Leaf |
no |
1 |
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 |
|
1.44 mg/100 ml
|
China black tea 2 |
no |
1 |
|
2.28 mg/100 ml
|
China black tea 3 |
no |
1 |
|
2.62 mg/100 ml
|
China black tea 4 |
no |
1 |
|
2.10 mg/100 ml
|
China black tea 5 |
no |
1 |
|
1.68 mg/100 ml
|
China black tea 6 |
no |
1 |
|
23.80 mg/100 ml
|
China black tea 7 |
no |
1 |
|
3.52 mg/100 ml
|
China black tea 8 |
no |
1 |
|
5.38 mg/100 ml
|
China black tea 1 |
no |
1 |
|
4.12 mg/100 ml
|
China black tea 9 |
no |
1 |
|
3.76 mg/100 ml
|
China black tea 10 |
no |
1 |
|
4.00 mg/100 ml
|
China black tea 11 |
no |
1 |
|
5.70 mg/100 ml
|
China black tea 12 |
no |
1 |
|
7.06 mg/100 ml
|
China black tea 13 |
no |
1 |
|
4.32 mg/100 ml
|
China black tea 14 |
no |
1 |
|
2.80 mg/100 ml
|
China black tea 15 |
no |
1 |
|
5.48 mg/100 ml
|
China black tea 16 |
no |
1 |
|
5.10 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 |
|
9.90 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 |
|
1.30 mg/100 ml
|
Black tea infusion, Hoji-cha, Japan |
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 |
|
16.25 mg/100 ml
|
Black tea infusion, Assam |
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 |
|
3.45 mg/100 ml
|
Black tea infusion brand 1 |
no |
3 |
|
3.10 mg/100 ml
|
Black tea infusion brand 6 |
no |
3 |
|
2.51 mg/100 ml
|
Black tea infusion brand 7 |
no |
3 |
|
2.04 mg/100 ml
|
Black tea infusion brand 2 |
no |
3 |
|
2.44 mg/100 ml
|
Black tea infusion brand 3 |
no |
3 |
|
3.70 mg/100 ml
|
Black tea infusion brand 4 |
no |
3 |
|
5.13 mg/100 ml
|
Black tea infusion brand 5 |
no |
3 |
Begona Barroso, M.; Werken van de, G. (1999) Determination of green and black tea composition by capillary electrophoresis. Journal of High Resolution Chromatography 22:225-230 PubMed (19266552)
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
3.60 mg/100 ml
|
Black tea infusion |
no |
1 |
Luximon-Ramma A., Bahorun T., Crozier A., Zbarsky V., Datla K.P., Dexter D.T., Aruoma O.I. (2005) Characterization of the antioxidant functions of flavonoids and proanthocyanidins in Mauritian black teas. Food Research International 38:357-367
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
5.61 mg/100 ml
|
Black tea - Brand "3-Pavillions" |
yes |
1 |
|
6.77 mg/100 ml
|
Black tea - Brand "Black Label" |
yes |
1 |
|
5.57 mg/100 ml
|
Black tea - Brand "Red Label" |
yes |
1 |
|
9.71 mg/100 ml
|
Black tea - Brand "Extra" |
yes |
1 |
|
9.47 mg/100 ml
|
Black tea - Brand "Ouvagalia" |
yes |
1 |
|
6.71 mg/100 ml
|
Black tea - Brand "Chartreuse" |
yes |
1 |
|
8.12 mg/100 ml
|
Black tea - Brand "Corson" |
yes |
1 |
|
5.22 mg/100 ml
|
Black tea - Brand "La Flora" |
yes |
1 |
|
7.01 mg/100 ml
|
Black tea - Brand "Buccaneer's Choice" |
yes |
1 |
|
1.69 mg/100 ml
|
Black tea - Fresh tea leaves infusion |
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 |
|
2.38 mg/100 ml
|
Black tea infusion |
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 |
|
6.80 mg/100 ml
|
Black tea - Infusion - 100°C |
no |
1 |
Ding Z., Kuhr S., Engelhardt U.H. (1992) Influence of catechins and theaflavins on the astringent taste of black tea brews. Zeitschrift fuer Lebensmittel Untersuchung und Forschung 195:108-111
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
1.90 mg/100 ml
|
Black tea infusion 1 - China - Feinster Tippy-Yunnan |
no |
1 |
|
57.60 mg/100 ml
|
Black tea infusion 2 - China - Darjeeling first flush |
no |
1 |
|
37.20 mg/100 ml
|
Black tea infusion 3 - China - Darjeeling second flush |
no |
1 |
|
36.00 mg/100 ml
|
Black tea infusion 4 - China - Darjeeling autumnal |
no |
1 |
|
16.10 mg/100 ml
|
Black tea infusion 5 - China - Assam broken |
no |
1 |
|
13.60 mg/100 ml
|
Black tea infusion 6 - China - Assam leaf |
no |
1 |
|
5.30 mg/100 ml
|
Black tea infusion 7 - China - Ceylon Lowgrown |
no |
1 |
|
67.90 mg/100 ml
|
Black tea infusion 8 - China - Ceylon Uva Highland |
no |
1 |
|
11.20 mg/100 ml
|
Black tea infusion 9 - China - Kenya |
no |
1 |
|
5.60 mg/100 ml
|
Black tea infusion 10 - China - China black tea |
no |
1 |
|
14.90 mg/100 ml
|
Black tea infusion 11 - China - China black tea |
no |
1 |
|
7.50 mg/100 ml
|
Black tea infusion 12 - China - China black tea |
no |
1 |
|
4.80 mg/100 ml
|
Black tea infusion 13 - China - China black tea |
no |
1 |
|
10.40 mg/100 ml
|
Black tea infusion 14 - China - China black tea |
no |
1 |
|
4.90 mg/100 ml
|
Black tea infusion 15 - China - China black tea |
no |
1 |