Table 4 Catechin plasma levels before and after hydrolysis (deconjugation) 2 hours after interventions.

From: Tea-induced improvement of endothelial function in humans: No role for epigallocatechin gallate (EGCG)

 

EC

ECG

EGC

EGCG

before hydrolysis

after hydrolysis

before hydrolysis

after hydrolysis

before hydrolysis

after hydrolysis

before hydrolysis

after hydrolysis

ng/ml

µM

ng/ml

µM

ng/ml

µM

ng/ml

µM

ng/ml

µM

ng/ml

µM

ng/ml

µM

ng/ml

µM

Green tea

n.d.

n.d.

12.6 (13.5)

0.03 (0.03)

34.1 (15.0)

0.07 (0.03)

35.8 (15.1)

0.08 (0.03)

1.7 (4.3)

n.q.

27.3 (12.8)

0.06 (0.03)

66.9 (27.0)

0.15 (0.06)

65.2 (28.0)

0.14 (0.06)

GTE

n.d.

n.d.

17.2 (15.6)

0.04 (0.03)

21.7 (10.9)

0.05 (0.02)

22.3 (10.7)

0.05 (0.02)

2.4 (4.9)

0.01 (0.01)

33.6 (14.8)

0.07 (0.03)

102.7 (47.2)

0.22 (0.10)

98.2 (45.6)

0.21 (0.10)

EGCG

n.d.

n.d.

n.d.

n.d.

5.9 (8.9)

0.01 (0.02)

5.8 (8.8)

0.01 (0.02)

0.5 (3.3)

n.q.

1.8 (6.7)

n.q.

149.0 (112.0)

0.32 (0.24)

145.9 (109.6)

0.32 (0.24)

  1. EC, epicatechin; ECG, epicatechin gallate; EGC, epigallocatechin; EGCG, epigallocatechin gallate; n.d. not detectable; n.q. not quantifiable.
  2. Data are mean (SD) from n = 50 subjects for green tea and EGCG and n = 49 for GTE.
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