The Official Journal of the Pan-Pacific Association of Input-Output Studies (PAPAIOS)
Table 1 Tea components and their major effects on human health (Sakamoto et al. 2012; Nihon 2014)
Component | Content | Effect | |
|---|---|---|---|
Min | Max | ||
Tannin | 8.4% | 18.2% | Antioxidant, antibacterial effect, decreases blood cholesterol, cancer prevention effect, inhibits high blood pressure, antibacterial effect, deodorizing antiallergic, Inhibition of blood sugar level |
Caffeine | 2.6% | 3.9% | Awakening effect, cardiac effect, stress relief, recovery from fatigue, anti-asthmatic, diuresis |
Amino acids | 1.20% | 2.40% | Â |
 Glutamic acid | 43 mg% | 136.7 mg% | Detoxification action on ammonia, diuresis, inhibits high blood pressure |
 Theanine | 199.6 mg% | 809.3 mg% | Control of cerebral neurotransmitter, protection of nerve cells |
 γ-aminobutyric acid | 11.4 mg% | 66.1 mg% | Anti-stress, improvement in brain function, inhibits high blood pressure |