Table 1.

The content of gallic acid and catechins in the black teas.

Parameter	GA *	EGC *	EGCG *	ECG *	EC *	Total
CH (China)
Mean (mg/100 mL)	3.54	18.0	0.29	-	-	21.8
SD	0.28	1.92	0.02
Range	3.37–4.11	15.7–20.6	0.18–0.45
JA (Japan)
Mean (mg/100 mL)	2.66	14.2	0.15	-	0.04	17.1
SD	0.43	1.77	0.04		0.01
Range	2.05–3.09	12.0–17.3	0.12–0.20		0.03–0.07
K (Kenya)
Mean (mg/100 mL)	5.34	33.0	0.12	-	0.38	38.8
SD	0.45	2.93	0.03		0.03
Range	4.69–5.94	29.9–36.5	0.08–0.15		0.35–0.41
I (India)
Mean (mg/100 mL)	6.0	178.0	0.86	-	-	184.8
SD	0.73	19.5	0.07
Range	5.28–7.11	156.8–205.2	0.64–0.96
S (Sri Lanka)
Mean (mg/100 mL)	3.74	49.2	1.18	-	-	54.1
SD	0.59	5.25	0.17
Range	3.29–4.53	41.2–58.4	0.84–1.32
IR (Iran)
Mean (mg/100 mL)	0.27	9.91	-	0.08	0.28	10.5
SD	0.01	1.16		0.007	0.05
Range	0.21–0.29	8.35–11.4		0.06–0.09	0.19–0.34
NH (Nepal)
Mean (mg/100 mL)	3.68	25.5	0.05	0.36	0.51	30.1
SD	0.35	4.18	0.009	0.04	0.08
Range	3.18–3.95	18.5–32.8	0.04–0.06	0.33–0.43	0.42–0.57
NM (Nepal)
Mean (mg/100 mL)	9.42	33.9	0.06	0.12	0.57	44.1
SD	1.74	4.01	0.02	0.022	0.08
Range	7.12–11.5	28.1–39.4	0.04–0.09	0.1–0.15	0.48–0.68

* GA (gallic acid), EC (epicatechin), ECG (epicatechin gallate), EGC (epigallocatechin), and EGCG (epigallocatechin-3-gallate).