Currants antioxidant activity

Chiou A. Karathanos V.T. Mylona A. Salta F.N. Prevent F. Andrikopoulos N.K. 2007. Currants Vitis vinifera L.) content of simple phenolics and antioxidant activity. Food Chem. 102 516-522. 

We observed a small but significant inaease in plasma hydrophilic and lipophilic antioxidant capacity following the consumption of a single meal of 189 g of blueberries (10 mg anthocyanins/kg). Others " reported an increase in plasma antioxidant capacity (acetone fraction) after the consumption of approximately 1.2 g of anthocyanins (15 mg anthocyanins/kg) from blueberry. Matsumoto et al." observed a rapid inaease in plasma antioxidant activity, as indicated by monitoring chemiluminescence intensity, after oral administration of black currant anthocyanins (0.573 mg/kg). A small iuCTease in antioxidant activity in plasma was observed in elderly subjects who consumed 1 cup of blueberries per day for a period of 30 days. What is not known is if anthocyanins are accumulated in tissues when consumed over an extended period of time. 

Matsumoto, A., Nakamura, Y., Hirayama, M., Yoshiki, Y, and Okubo, K., Antioxidant activity of black currant anthocyanin aglycons and their glycosides measured by chemiluminescence in a neutral pH region and in human plasma, J. Agric. Food Chem., 50, 5034-5037, 2002. 

Miller and Rice-Evans (1997) studied total antioxidant activity (TAA) and reduction in vitamin C during storage of black currant drinks containing 16.7% and 25% black currant extract. The anthocyanin fraction of the black currant drinks contributed only partly to the TAA values, and the authors concluded that there may be additional antioxidants present in the black currant drinks. The black currant drinks demonstrated vitamin C sparing ability. 

Xiong S, Melton LD, Easteal AJ, Slew D. Stability and antioxidant activity of black currant anthocyanins in solution and encapsulated in glucan gel. J Agric Food Chem. 2006 54(17) 6201-6208. 

Black currant polyphenols Maltodextrins and inulin Spray drying Protection of antioxid t activity [157]... 

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