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The role of ginsenoside protopanaxatriol (one major extract of ginseng), quercetin, and (–)-epigallocatechin-3-gallate (one major extract of tea) in enhancing chemotherapeutic efficacy of various chemotherapy drugs, and together reducing their side effects. After oral administration of these compounds, they can be biotransformed to stronger components and play a synergistic role with various chemotherapy drugs.
