Red wine consumption increases antioxidant status and decreases oxidative stress in the circulation of both young and old humans

Michelle Micallef, Louise Lexis, Paul Lewandowski, Michelle Micallef, Louise Lexis, Paul Lewandowski

Abstract

Background: Red wine contains a naturally rich source of antioxidants, which may protect the body from oxidative stress, a determinant of age-related disease. The current study set out to determine the in vivo effects of moderate red wine consumption on antioxidant status and oxidative stress in the circulation.

Methods: 20 young (18-30 yrs) and 20 older (>or= 50 yrs) volunteers were recruited. Each age group was randomly divided into treatment subjects who consumed 400 mL/day of red wine for two weeks, or control subjects who abstained from alcohol for two weeks, after which they crossed over into the other group. Blood samples were collected before and after red wine consumption and were used for analysis of whole blood glutathione (GSH), plasma malondialdehyde (MDA) and serum total antioxidant status.

Results: Results from this study show consumption of red wine induced significant increases in plasma total antioxidant status (P < 0.03), and significant decreases in plasma MDA (P < 0.001) and GSH (P < 0.004) in young and old subjects. The results show that the consumption of 400 mL/day of red wine for two weeks, significantly increases antioxidant status and decreases oxidative stress in the circulation

Conclusion: It may be implied from this data that red wine provides general oxidative protection and to lipid systems in circulation via the increase in antioxidant status.

Figures

Figure 1
Figure 1
Outline of study. Volunteers consumed 400 mL/day of red wine for two weeks or abstained from consuming alcohol, grapes or grape products for two weeks and crossed over into the other group after a two week washout.
Figure 2
Figure 2
Blood glutathione. Effect of red wine consumption on blood GSH concentrations from young (18–30 yrs) and older (≥ 50 yrs) volunteers. Bars represent mean ± SEM of blood GSH values pre and post two weeks of red wine consumption or abstinence. YA, young abstinence; YW, young wine; OA, older abstinence; OW older wine. a indicates a significant change with wine P < 0.05. b indicates a significant difference between young and old, P < 0.05.
Figure 3
Figure 3
Plasma malondialdehyde. Effect of red wine consumption on plasma MDA concentrations from young (18–30 yrs) and older (≥ 50 yrs) volunteers. Bars represent mean ± SEM of plasma MDA values pre and post two weeks of red wine consumption or abstinence. YA, young abstinence; YW, young wine; OA, older abstinence; OW older wine. a indicates a significant change with wine P < 0.05. b indicates a significant difference between young and old, P < 0.05.
Figure 4
Figure 4
Serum total antioxidant status. Effect of red wine consumption on serum TAS from young (18–30 yrs) and older (≥ 50 yrs) volunteers. Bars represent mean ± SEM of serum TAS pre and post two weeks of red wine consumption or abstinence. YA, young abstinence; YW, young wine; OA, older abstinence; OW older wine; RW red wine a indicates a significant change with wine P < 0.05. b indicates a significant difference between young and old, P < 0.05.

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Source: PubMed

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