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No Significant Effects of Lutein, Lycopene or ß-Carotene Supplementation on Biological Markers of Oxidative Stress and LDL Oxidizability in Healthy Adult Subjects

Laboratoire de Biologie du Stress Oxydant, Faculté de Pharmacie, Université Joseph Fourier de Pharmacie, La Tronche, FRANCE (I.A.H., A.E.F., A.-M.R.)
Hoffmann La Roche, Bale, SWITZERLAND (A.M.-W., U.M.)
Institute of Food Research, Norwich, UNITED KINGDOM(A.W., S.S.)
University of Ulster, Coleraine, NORTHERN IRELAND (D.T.,M.C.)
TNO-CIVO Institute, Zeist, THE NETHERLANDS (H.V.D.B.)
Clinica Puerta de Hierro, Madrid, SPAIN (B.O.)

Address reprint requests to: Pr. Anne-Marie Roussel, Laboratoire de Biologie du Stress Oxydant (LBSO), Faculté de Pharmacie, UJF, Domaine de la Merci, 38700 La Tronche, FRANCE. E-mail: Anne-Marie.Roussel{at}ujf-grenoble.fr

Objective: The objective of this study was to determine the effect of individual carotenoid supplementation on biochemical indices of oxidative status in apparently healthy adult males.

Methods:The study was a placebo controlled single blind study. Healthy male volunteers (n=175) were assigned to four groups. They received daily supplements of ß-carotene (15 mg), lutein (15 mg), lycopene (15 mg) and placebo for three months. The effects of the supplementation on antioxidant status were monitored by plasma carotenoid, vitamin C and A levels, glutathione (GSH and GSSG) concentrations, protein SH groups, erythrocyte antioxidant enzyme activities (Cu-Zn SOD, Se-GSH-Px) and susceptibility of LDL to copper-induced oxidation.

Results:ß-carotene, lycopene and lutein supplementation led to significant plasma and LDL increases in each of these carotenoids, without modifications of other carotenoid levels in plasma or in LDL. The supplementation failed to enhance the resistance of LDL to oxidation or to modify the LDL polyunsaturated/saturated fatty acid ratio. Vitamin C, GSH, protein SH groups and antioxidant metalloenzyme activities were also unchanged.

Conclusion: We did not observe beneficial or adverse effects of lutein, lycopene or ß-carotene supplementation on biomarkers of oxidative stress. In apparently healthy subjects, carotenoid supplementation does not lead to significantly measurable improvement in antioxidant defenses.

Key words: lutein, lycopene, ß-carotene, LDL oxidizability, oxidative stress, carotenoid supplementation

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