- Natural product: Green tea (Camellia sinensis)
- Associated study: Phase I pharmacokinetic study of tea polyphenols following single-dose administration of epigallocatechin gallate and polyphenon E.
In Vivo Pharmacokinetics Study
In vivo PK of tea polyphenols 200 mg EGCG capsules
Results
The authors report a CL/F value but they don't have or mention administration of any IV formulation to use for calculating oral bioavailability (assuming F = (AUC_{po}XDose_{iv})/(AUC_{iv}XDose_{po}). So, I think that the they are really just reporting Cl from Dose/AUC. A similar comment applies to volume of distribution. These two values have not been entered into the repository.
| Sample | Compound measured | Value | Measurement | Study sequence | Additional information | N replicates |
|---|
Experimental Conditions
Randomized crossover
Multiple dosing
Healthy volunteers
5
Blood samples were collected before administration of the medication administration and 0.5, 1, 2, 4, 6, 8, and 24 h after drug administration. Study subjects self-collected urine before dosing and at three intervals during the 24 h period after dosing (0-4, 4-8, and 8-24 h)
Drug or Natural Product Administration
Oral
capsule
200 mg
Fed
All study participants were required to refrain from the ingestion of tea or tea products for 7 days before the dose administration. The day before the pharmacokinetic study, study partici- pants were instructed to fast after midnight except for drinking water. On the pharmacokinetic study day, study subjects skipped breakfast and took no over the counter medications, vitamins, or health food products. Study participants came to the clinic in the early morning (6 – 8 a.m.) and were provided with one to two bagels for breakfast.
single dose
Food Research Laboratories, Mitsui Norin Co., Ltd., (Fujieda City, Japan)
Each EGCG capsule contained 200 mg EGCG
not available
Pharmacodynamics (PD) & Adverse Events
General disorders and administration site conditions
35800000
Mild headache and fatigue