Calculated Mean Content Values

Units Average Min Max Standard Deviation
mg/100 ml 104.48 12.26 134.90 25.96
mol/100 ml 0.00 0.00 0.00 0.00

Values calculated by aggregating data from 23 different samples from 4 unique publications.

Aglycone Mean Content Values

Aglycone Units Average Min Max Standard Deviation

Original Content Values Used to Produce Means

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
80.50 mg/100 ml Black tea PG Tips no 1
97.40 mg/100 ml Black tea Yorkshire Gold no 1
134.90 mg/100 ml Black tea Ceylon no 1
98.80 mg/100 ml Black tea Darjeeling no 1
106.20 mg/100 ml Indian Green Tea no 1
87.00 mg/100 ml Green tea Chun mee (China) no 1
65.80 mg/100 ml Green tea Bandia (Japan) no 1
Astill, C.; Birch, M.R.; Dacombe, C.; Humphrey, P.G.; Martin, P.T. (2001) Factors affecting the caffeine and polyphenol contents of black and green tea infusions. Journal of Agricultural and Food Chemistry 49:5340-5347 PubMed (11714326)
Original Content Value Original Food Description Commercial Origin # of Samples Analyzed
81.00 mg/100 ml Black tea infusion no 1
129.90 mg/100 ml Black tea infusion no 1
112.00 mg/100 ml Black tea infusion no 1
108.70 mg/100 ml Black tea infusion no 1
87.20 mg/100 ml Black tea infusion no 1
106.60 mg/100 ml Black tea infusion no 1
88.00 mg/100 ml Black tea infusion no 1
80.10 mg/100 ml Black tea infusion 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
123.26 mg/100 ml Black tea infusion brand 5 no 3
107.82 mg/100 ml Black tea infusion brand 6 no 3
116.30 mg/100 ml Black tea infusion brand 1 no 3
111.08 mg/100 ml Black tea infusion brand 7 no 3
95.21 mg/100 ml Black tea infusion brand 2 no 3
117.60 mg/100 ml Black tea infusion brand 3 no 3
125.21 mg/100 ml Black tea infusion brand 4 no 3
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
12.26 mg/100 ml Black tea - Fresh tea leaves infusion no 1