Comparative in vitro antioxidant evaluation of different extracts of Camellia sinensis leaves form different geographical locations in India

Introduction: The present study was conducted to assess and compare the in vitro antioxidant property of four different solvent extracts from Camellia sinensis (tea) leaves collected form five different geographical regions of India. Methods: All the extracts at two different concentrations (500 and 1000 µg/ml) was tested for their in vitro free radical scavenging potential by 1,1-diphenyl-2-picryl-hydrazyl (DPPH) radical scavenging assay. Results: All the test tea extracts were found to exhibit remarkable free radical scavenging or antioxidant effect. The tea sample form Kerala was found to be the most active. Conclusion: The marked but differential antioxidant effect of C. sinensis leaf from different locations was plausibly due to geographical variations in chemical constituents especially polyphenol contents of C. sinensis leaf.