Supplementation with lutein or lutein plus green tea extracts does not change oxidative stress in adequately nourished older adults
- PMID: 19447020
- PMCID: PMC2873137
- DOI: 10.1016/j.jnutbio.2009.03.002
Supplementation with lutein or lutein plus green tea extracts does not change oxidative stress in adequately nourished older adults
Abstract
Epigallocatechin gallate, a major component of green tea polyphenols, protects against the oxidation of fat-soluble antioxidants including lutein. The current study determined the effect of a relatively high but a dietary achievable dose of lutein or lutein plus green tea extract on antioxidant status. Healthy subjects (50-70 years) were randomly assigned to one of two groups (n=20 in each group): (1) a lutein (12 mg/day) supplemented group or (2) a lutein (12 mg/day) plus green tea extract (200 mg/day) supplemented group. After 2 weeks of run-in period consuming less than two servings of lightly colored fruits and vegetables in their diet, each group was treated for 112 days while on their customary regular diets. Plasma carotenoids including lutein, tocopherols, flavanols and ascorbic acid were analyzed by HPLC-UVD and HPLC-electrochemical detector systems; total antioxidant capacity by fluorometry; lipid peroxidation by malondialdehyde using a HPLC system with a fluorescent detector and by total hydroxyoctadecadienoic acids using a GC/MS. Plasma lutein, total carotenoids and ascorbic acid concentrations of subjects in either the lutein group or the lutein plus green tea extract group were significantly increased (P<.05) at 4 weeks and throughout the 16-week study period. However, no significant changes from baseline in any biomarker of overall antioxidant activity or lipid peroxidation of the subjects were seen in either group. Our results indicate that an increase of antioxidant concentrations within a range that could readily be achieved in a healthful diet does not affect in vivo antioxidant status in normal healthy subjects when sufficient amounts of antioxidants already exist.
Copyright (c) 2010 Elsevier Inc. All rights reserved.
Figures
Similar articles
-
Consumption of green tea or green tea products: is there an evidence for antioxidant effects from controlled interventional studies?Phytomedicine. 2011 Aug 15;18(11):903-15. doi: 10.1016/j.phymed.2011.06.006. Epub 2011 Jul 30. Phytomedicine. 2011. PMID: 21802928 Review.
-
Mechanisms and effects of green tea on cardiovascular health.Nutr Rev. 2007 Aug;65(8 Pt 1):361-75. doi: 10.1301/nr.2007.aug.361-375. Nutr Rev. 2007. PMID: 17867370 Review.
-
Bioavailability and antioxidant effect of epigallocatechin gallate administered in purified form versus as green tea extract in healthy individuals.J Nutr Biochem. 2005 Oct;16(10):610-6. doi: 10.1016/j.jnutbio.2005.03.003. J Nutr Biochem. 2005. PMID: 16081270
-
Bioavailability and antioxidant activity of tea flavanols after consumption of green tea, black tea, or a green tea extract supplement.Am J Clin Nutr. 2004 Dec;80(6):1558-64. doi: 10.1093/ajcn/80.6.1558. Am J Clin Nutr. 2004. PMID: 15585768 Clinical Trial.
-
The relation between single/double or repeated tea catechin ingestions and plasma antioxidant activity in humans.Eur J Clin Nutr. 2002 Dec;56(12):1186-93. doi: 10.1038/sj.ejcn.1601471. Eur J Clin Nutr. 2002. PMID: 12494303
Cited by
-
Effect of Green Tea Supplementation on Antioxidant Status in Adults: A Systematic Review and Meta-Analysis of Randomized Clinical Trials.Antioxidants (Basel). 2021 Oct 29;10(11):1731. doi: 10.3390/antiox10111731. Antioxidants (Basel). 2021. PMID: 34829602 Free PMC article. Review.
-
The Peroxidation of Leukocytes Index Ratio Reveals the Prooxidant Effect of Green Tea Extract.Oxid Med Cell Longev. 2016;2016:9139731. doi: 10.1155/2016/9139731. Epub 2016 Dec 22. Oxid Med Cell Longev. 2016. PMID: 28101300 Free PMC article.
-
Antioxidants from black and green tea: from dietary modulation of oxidative stress to pharmacological mechanisms.Br J Pharmacol. 2017 Jun;174(11):1195-1208. doi: 10.1111/bph.13649. Epub 2016 Nov 12. Br J Pharmacol. 2017. PMID: 27747873 Free PMC article. Review.
-
Evidence for beneficial effects of vitamin E.Korean J Intern Med. 2015 Sep;30(5):571-9. doi: 10.3904/kjim.2015.30.5.571. Epub 2015 Aug 27. Korean J Intern Med. 2015. PMID: 26354050 Free PMC article. Review.
-
The Effect of Green Tea versus Sour Tea on Insulin Resistance, Lipids Profiles and Oxidative Stress in Patients with Type 2 Diabetes Mellitus: A Randomized Clinical Trial.Iran J Med Sci. 2014 Sep;39(5):424-32. Iran J Med Sci. 2014. PMID: 25242840 Free PMC article.
References
-
- Seddon JM, Ajani UA, Sperduto RD, Hiller R, Blair N, Burton TC, Farber MD, Gragoudas ES, Haller J, Miller DT, et al. Dietary carotenoids, vitamins A, C, and E, and advanced age-related macular degeneration. Eye Disease Case-Control Study Group. JAMA. 1994;272:1413–20. - PubMed
-
- Bone RA, Landrum JT, Mayne ST, Gomez CM, Tibor SE, Twaroska EE. Macular pigment in donor eyes with and without AMD: a case-control study. Invest Ophthalmol Vis Sci. 2001;42:235–40. - PubMed
-
- Snellen EL, Verbeek AL, Van Den Hoogen GW, Cruysberg JR, Hoyng CB. Neovascular age-related macular degeneration and its relationship to antioxidant intake. Acta Ophthalmol Scand. 2002;80:368–71. - PubMed
Publication types
MeSH terms
Substances
Grants and funding
LinkOut - more resources
Full Text Sources
Medical
Miscellaneous