Table 1.
The contents of caffeine, catechins, and amino acids in the eluate of SWLT and placebo tea.
| Tea | Caffeine (mg/L) | Catechins (mg/L) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| EGCG | EGC | ECG | EC | GC | CG | (+)C | |||
| SWLT | 209.8 | 150.4 | 135.2 | 24.6 | 41.0 | 5.0 | 2.8 | 3.4 | |
| Placebo | 112.0 | 134.2 | 229.0 | 21.0 | 46.6 | 13.6 | 4.6 | 2.0 | |
| Tea | Free amino acids (mg/L) | ||||||||
| Thea | Arg | Gln | Asn | Asp | Glu | Ser | GABA | Total | |
| SWLT | 140.2 | 69.9 | 51.7 | 33.8 | 33.5 | 19.3 | 12.6 | 0 | 361.0 |
| Placebo | 28.8 | 5.4 | 3.9 | 0.7 | 5.5 | 6.9 | 2.2 | 0 | 53.5 |
Shaded white leaf tea (SWLT) and placebo green tea (3 g) were steeped in 500 mL of room-temperature water for 3 h. EGCG, (−)-epigallocatechin gallate; EGC, (−)-epigallocatechin; ECG, (−)-epicatechin gallate; EC, (−)-epicatechin; CG, (−)-catechin gallate; (+) C, (+)-catechin; Thea, theanine; Arg, arginine; Gln, glutamine; Asn, asparagine; Asp, aspartic acid; Glu, glutamic acid; Ser, serine; GABA, γ-aminobutyric acid.