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Antioxidant activity of Camellia sinensis leaves and tea from a lowland plantation in Malaysia

Antioxidant activity of Camellia sinensis leaves and tea from a lowland plantation in Malaysia

Author: E.W.C. Chan and Y.Y. Lim and Y.L. Chew

Methanol extracts of fresh tea leaves from a lowland plantation in Malaysia were screened for total phenolic content (TPC) and antioxidant activity (AOA). AOA evaluation included 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical-scavenging ability, ferric-reducing antioxidant power (FRAP), and ferrous-ion chelating (FIC) ability. Ranking, based on TPC and AOA, was as follows: shoots > young leaves > mature leaves. TPC and AOA of lowland leaves were comparable to those of highland plants. A green tea produced by drying young leaves in a household microwave oven for 4 min showed significantly higher TPC and AOA than did four commercial brands of green and black tea.

 

 

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