Abstract The crude tea polyphenols, polysaccharides
and proteins of regular green tea and Se-enriched green
tea were investigated in vitro for antioxidant activities by auto-oxidation test (AAPH) and α,α-diphenyl-β-
picrylhydrazyl (DPPH) radical scavenging method. Results
showed that crude tea polyphenols of Se-enriched green
tea provided the highest antioxidant activity by DPPH
assay and the antioxidant activity was decreased in the
order: crude tea polyphenols > crude tea proteins >
tea polysaccharides. The crude protein of Se-enriched green
tea was found to exhibit the highest antioxidant activity by