Table 2.
Average catechin and caffeine concentrations (± standard error; all reported in mg/g tea) for bagged and gunpowder green tea, culinary matcha, and ceremonial matcha samples
| Brand | Epicatechin | EGC | EGCG | GCG | E-CG | Caffeine |
|---|---|---|---|---|---|---|
| Green tea | ||||||
| 365 | 6.00 ± 0.18 | 13.86 ± 0.25 | 23.29 ± 1.15 | 2.06 ± 0.11 | 9.54 ± 0.53 | 17.11 ± 0.46 |
| Allegro | 6.50 ± 0.51 | 19.47 ± 1.20 | 46.24 ± 3.41 | 2.69 ± 0.31 | 16.06 ± 0.99 | 19.96 ± 1.96 |
| Lipton | 8.17 ± 0.22 | 24.38 ± 1.20 | 52.96 ± 1.08 | 2.36 ± 0.15 | 17.37 ± 0.71 | 23.52 ± 0.57 |
| PureLeaf | 7.26 ± 0.57 | 23.83 ± 1.04 | 70.22 ± 2.85 | 1.10 ± 0.15 | 28.02 ± 0.98 | 32.38 ± 3.37 |
| Twinings | 7.21 ± 0.37 | 19.57 ± 0.27 | 38.01 ± 0.38 | 3.16 ± 0.49 | 12.92 ± 1.57 | 22.45 ± 1.28 |
| Culinary matcha | ||||||
| Jade Leaf | 9.36 ± 0.66 | 38.04 ± 1.97 | 47.95 ± 3.05 | 2.52 ± 0.34 | 8.80 ± 1.07 | 17.74 ± 2.12 |
| Kenkō | 5.56 ± 0.31 | 30.74 ± 0.88 | 62.15 ± 1.63 | 1.26 ± 0.20 | 10.77 ± 0.51 | 32.23 ± 0.78 |
| Kiss Me | 11.21 ± 0.75 | 29.18 ± 1.79 | 36.70 ± 2.43 | 2.84 ± 0.32 | 9.31 ± 0.41 | 18.48 ± 1.11 |
| Matcha Wellness | 4.34 ± 0.34 | 19.75 ± 0.63 | 51.63 ± 1.02 | NDa | 11.89 ± 0.03 | 33.45 ± 1.09 |
| Zen Spirit | 4.76 ± 0.33 | 25.20 ± 1.11 | 54.21 ± 3.25 | NDa | 7.14 ± 0.40 | 29.57 ± 2.85 |
| Ceremonial matcha | ||||||
| Akira | 5.04 ± 0.44 | 26.21 ± 0.86 | 60.40 ± 1.89 | 0.73 ± 0.37 | 7.66 ± 0.50 | 34.89 ± 2.44 |
| Jade Leaf | 4.22 ± 0.33 | 21.34 ± 1.30 | 49.03 ± 2.95 | 1.43 ± 0.15 | 6.08 ± 0.65 | 24.95 ± 2.52 |
| Kenkō | 3.75 ± 0.79 | 17.91 ± 0.54 | 49.70 ± 1.59 | 1.47 ± 0.24 | 6.09 ± 0.21 | 31.55 ± 1.62 |
| Kiss Me | 4.17 ± 0.52 | 22.71 ± 0.16 | 53.98 ± 1.60 | 1.31 ± 0.07 | 5.12 ± 0.12 | 30.87 ± 0.56 |
| Matcha Organics | 5.25 ± 0.20 | 24.47 ± 0.11 | 69.73 ± 1.34 | 1.96 ± 0.25 | 9.21 ± 0.46 | 35.01 ± 2.46 |
EGC epigallocatechin; EGCG epigallocatechin gallate; GCG gallocatechin gallate and E-CG epi/catechin gallate
a ND not detected