Previous studies suggest that both RW and red grape juice (RGJ) have beneficial properties upon risk factors and cardiovascular events. However, the effects of grape polyphenols on metabolomics in men are still poorly understood. Recent advances in mass spectroscopy allowed substantial advances in the analysis of molecular signatures of several diseases.
Therefore, the objective of this study is to evaluate the impact of RGJ on plasma metabolomics in patients with chronic coronary disease (CAD). This is a crossover, prospective, randomized and controlled study, with two 3-week interventions: 1. daily consumption of RGJ (400 mL) and 2. total abstention from foods rich in polyphenols. Plasma metabolomics will be performed by gas chromatography (GC)/mass spectroscopy (MS) by (Prof. Labate, Department of Plant Genetics, ESALQ). The sample will consist of 50 patients with chronic CAD. aged between 46 and 69 years. The inclusion and exclusion criteria were defined to achieve homogeneity of the group and avoid interference. The central hypothesis of this study is that RGJ will exert effects upon pathways involved in lipids, carbohidrates and energy production, contributing to the understanding of the mechanisms of action of polyphenols on cardiovascular health, without the risks associated with alcohol.