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Volume 384, Issue 3 p. 240-242
Research letter
Free Access

Antioxidant activities of carotenes and xanthophylls

Nicholas J. Miller

Nicholas J. Miller

Free Radical Research Group, UMDS-Guy's Hospital, St Thomas's Street, London SE1 9RT, UK

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Julia Sampson

Julia Sampson

Free Radical Research Group, UMDS-Guy's Hospital, St Thomas's Street, London SE1 9RT, UK

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Luis P. Candeias

Luis P. Candeias

Gray Laboratory, Cancer Research Trust, Mount Vernon Hospital, Northwood, Middlesex HA6 2YR, UK

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Peter M. Bramley

Peter M. Bramley

Division of Biochemistry, School of Biological Sciences, Royal Holloway, University of London, Egham, Surrey TW20 0EX, UK

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Catherine A. Rice-Evans

Catherine A. Rice-Evans

Free Radical Research Group, UMDS-Guy's Hospital, St Thomas's Street, London SE1 9RT, UK

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First published: April 22, 1996
Citations: 756
Corresponding author. Fax: (44) (171) 955 4983.

Abstract

The purpose of this study was to assess the relative antioxidant activities of a range of carotenes and xanthophylls through the extent of their abilities to scavenge the ABTS·+ radical cation. The results show that the relative abilities of the carotenoids to scavenge the ABTS·+ radical cation are influenced by the presence of functional groups with increasing polarities, such as carbonyl and hydroxyl groups, in the terminal rings, as well as by the number of conjugated double bonds.