Calculated Mean Content Values
| Units |
Average |
Min |
Max |
Standard Deviation |
| mg/100 ml |
0.73 |
0.29 |
2.07 |
0.43 |
| mol/100 ml |
1.58e-06 |
6.24e-07 |
4.46e-06 |
9.22e-07 |
Values calculated by aggregating data from 19
different samples
from
3 unique
publications.
Aglycone Mean Content Values
| Aglycone |
Units |
Average |
Min |
Max |
Standard Deviation |
| Quercetin |
mg/100 ml |
0.48 |
0.19 |
1.35 |
0.28 |
| mol/100 ml |
1.03e-06 |
4.06e-07 |
2.90e-06 |
6.00e-07 |
Original Content Values Used to Produce Means
Price, K.R.; Rhodes, M.J.C.; Barnes, K.A. (1998) Flavonol glycoside content and composition of tea infusions made from commercially available teas and tea products. Journal of Agricultural and Food Chemistry 46:2517-2522
| Original Content Value |
Original Food Description |
Commercial Origin |
# of Samples Analyzed |
|
0.66 mg/100 ml
|
Black tea blend 1 |
no |
1 |
|
0.29 mg/100 ml
|
Black tea Keemun |
no |
1 |
|
1.02 mg/100 ml
|
Black tea blend 2 |
no |
1 |
|
0.99 mg/100 ml
|
Black tea blend 3 |
no |
1 |
|
0.95 mg/100 ml
|
Black tea blend 4 |
no |
1 |
|
1.53 mg/100 ml
|
Black tea blend 5 |
no |
1 |
|
0.56 mg/100 ml
|
Black tea Lapsang souchong |
no |
1 |
|
2.07 mg/100 ml
|
Black tea Ceylon |
no |
1 |
|
0.43 mg/100 ml
|
Black tea Assam |
no |
1 |
|
0.96 mg/100 ml
|
Black tea Njuno |
no |
1 |
|
0.82 mg/100 ml
|
Black tea Darjeeling |
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 |
|
0.63 mg/100 ml
|
Black tea infusion brand 1 |
no |
3 |
|
0.45 mg/100 ml
|
Black tea infusion brand 5 |
no |
3 |
|
0.62 mg/100 ml
|
Black tea infusion brand 6 |
no |
3 |
|
0.79 mg/100 ml
|
Black tea infusion brand 7 |
no |
3 |
|
0.50 mg/100 ml
|
Black tea infusion brand 2 |
no |
3 |
|
0.69 mg/100 ml
|
Black tea infusion brand 3 |
no |
3 |
|
0.53 mg/100 ml
|
Black tea infusion brand 4 |
no |
3 |
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 |
|
1.25 mg/100 ml
|
Black tea infusion |
no |
1 |