The Effect of Tomato Juice Consumption on Antioxidant Status in Overweight and Obese Females

Abstract

Tomatoes and their products are the main source of lycopene, a powerful potent antioxidant. Tomato products improve antioxidant defenses and reduce the risk of oxidative stress, at least partly, due to the presence of lycopene. Lycopene, as an antioxidant, induces the upregulation of antioxidant enzymes and reinforces the total enzyme capacity of the human body. Obesity is a chronic condition in which destructive mechanisms increase the reactive oxygen species and attenuation of antioxidant status. We hypothesized that the consumption of a lycopene-rich food would improve the antioxidant defense of women who were overweight or obese. A total of seventy-five overweight or obese female students of the Tehran University of Medical Sciences were enrolled and randomly allocated to one of two groups, intervention (n = 40) or control (n = 35), consuming 330 ml/d of tomato juice or water, respectively, for a 20-day period. At baseline and day 20, total antioxidant capacity and antioxidant enzyme activity (superoxide dismutase, glutathione peroxidase, and catalase) were analyzed using ELISA kits and spectrophotometric methods and then compared between the two groups. Lycopene consumption had no effect on these aforementioned variables. Therefore, it seems that more research with longer duration and more sensitive indicators will be required.

Keywords:

• antioxidant enzyme
• obese
• overweight
• tomato

ACKNOWLEDGMENTS

This article was written based on the data from a M.S. thesis and was supported by Tabriz University of Medical Sciences. The authors gratefully acknowledge of Nutrition Research Center of Tabriz University of Medical Sciences and volunteers for their cooperation and participation in this study.

The authors would like to advise that all authors listed have contributed to the work and approved the content of the submitted manuscript. We have no conflicts of interest in this study to declare.