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Article: Antioxidant activity of fruit juices.(Letters to the Editor)(Letter to the Editor)
- Article from:
- Townsend Letter for Doctors and Patients
- Article date:
- April 1, 2004
- Author:
CopyrightCOPYRIGHT 2004 The Townsend Letter Group. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Editor:
The antioxidant activity of fruits, vegetables and grain products is probably a reflection of their phenolic content. (1) We wished to ascertain this for commercial fruit juices and, hence, the in vitro antioxidant activity of various juices as well as their total phenolic content was determined. We measured the antioxidant capacity of these juices by their ability to reduce ferrictripyridyl-s-triazine to the ferrous form which absorbs light at 593 nm [Ferric Reducing/Antioxidant Power (FRAP assay]. (2) We determined the in vitro total phenols present in these juices by the Folin and Ciocalteu's Reagent using gallic acid as a standard and measuring the ...