Tea is an infusion of leaves of the evergreen shrub <i>Camellia sinensis,</i> a member of the Theaceae family. It is valued for its taste, aroma, health benefits, and form part of some cultural practices. Through the ages, tea consumption was associated with beneficial effects on human health. Most of the health-promoting effects of tea are attributed to its polyphenolic compounds and their antioxidant activity. At present, it is the most popular and widely consumed beverage in the world, second only to water. In this study, the phenolic and flavonoid content were correlated with the antioxidant activities of several commercially available tea from Tipson tea company. The total phenolic content was determined by the Folin-Ciocâlteu method with gallic acid used as the standard while the flavonoid content was determined using alumnium chloride assay with quercetin as standard.. The antioxidant properties evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay system. Results showed a direct relationship between the phenolic content and the antioxidant activities of the different tea samples analyzed.

Correlation of phenolic and flavonoid content with antioxidant activities of commercial tea samples

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