Black tea extract improves anti-oxidant profile in experimental diabetic rats.
Arch Physiol Biochem. 2015 Jul ;121(3):109-15. Epub 2015 Jun 29. PMID: 26120044
OBJECTIVE: The purpose of this study was to investigate the in vivo anti-oxidant effect of black tea extract (BTE) supplemented to normal and alloxan-induced diabetic rats.
METHODS: Black tea extract (BTE) was fed to control and experimental diabetic rats by gavage technique at a dose of 1 ml/100 g body weight/day. Markers of oxidative stress in blood were determined.
RESULT: Results show a significant (P < 0.01) decrease (73%) in plasma anti-oxidant potential, increase in activity of plasma membrane redox system (122%), protein oxidation and lipid peroxidation in diabetic rats, BTE supplemented diabetic rats had improved anti-oxidant profile and lower protein and lipid peroxidation levels. Diabeticrats displayed lower intracellular glutathione (GSH), BTE supplementation improved GSH levels.
CONCLUSION: Results of this study suggest that the 2.5% aqueous extract of black tea is effective to ameliorate diabetes associated oxidative stress parameters in experimental model of diabetes.