Catechin regenerated

Flavonoids are chain-breaking antioxidants in lipid-like solvents like chlorobenzene, although the k(inh) is smaller than for a-tocopherol and the lag-phase accordingly less evident. For peroxidating lipids in chlorobenzene the clear lag-phase for a-tocopherol became longer when quercetin or catechin were present. The effect appears to be additive and a regeneration of a-tocopherol by quercetin or catechin in this lipid-like solvent should rather be termed a co-antioxidative effect (Pedrielli and Skibsted, 2002). 

PEDRiELLi p and SKIBSTED L H (2002) Antioxidant syneigy and regeneration effect of quercetin, (-)epicatechin, and (+)-catechin on a-tocopherol in homogeneous solutions of peroxidating methyl linoleate, JAgric Food Chem, 50, 7138-44. 

ZHU Q Y, HUANG Y, TsoNG D aiid CHEN z Y (1999) Regeneration of a-tocopherol in human low density lipoprotein by green tea catechin, JAgric Food Chem, 47, 2020-25. 

Mukai, K., Mitani, S., Ohara, K. Nagaoka, S. (2005). Structure-activity relationship of the tocopherol-regeneration reaction by catechins. Free Radical Biology Medicine, 38, 1243-1256. 

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