To study the stability of tea catechin in the artificial simulation gastric juices and artificial simulation intestinal juice, the authors applied liquid chromatography to examine the stability in the environment of vary pH and simulation stomach and intestines way. Results showed stability of tea catechin were best in pH5.8, with tea catechin comparative largeiy destructed in the artificial simulation gastric juices. However, it was comparatively stable in the artificial simulation intestinal juice, and tea catechin wasn't af...