Efeitos da suplementação de suco de uva branco sobre as medidas antropométricas e bioquímicas em mulheres

Abstract

Grape juice is a drink rich in phenolic compounds, which are important antioxidants associated with reduction in the incidence of diseases related to oxidative stress, including cardiovascular diseases. Studies about the effects of red grape juice supplementation have already been performed; however, there are no data on the effects of consumption of white grape juice until now. In view of this, the objective of this study was to evaluate the effects of white grape juice supplementation on body mass index (BMI), waist (WC) and abdominal (AC) circumference, blood pressure, glucose, insulin, oxidative damage and lipid profile in women. At the same time, the diet antioxidant capacity of these women was also evaluated. Twenty-five women aged 50-67 years participated of this study. The volunteers were instructed to consume 7ml/kg weight/day of white grape juice (Vitis labrusca) without any other change in diet energy consumption or habitual lifestyle. The supplementation occurred during 30 days. Anthropometric data and blood samples were collected before and after intervention. Most of the participants had university degrees, declaring practice physical activity and take medication. Forty-four percent of the volunteers were eutrophic and 40% were overweight. The participants presented intake of macronutrients adequate to nutritional recommendations (DRI). The micronutrients calcium, iodine, folate, selenium, vitamin B1 and D were consumed in smaller quantity than recommended; sodium was ingested in greater amount than those recommended by DRI. The dietary antioxidant capacity of volunteers was higher than obtained in healthy American individuals. Supplementation with white grape juice reduced BMI, WC and AC (p<0.001). There was no difference in blood pressure before and after white grape juice consumption. In addition, there was no change in glycemia, insulin and oxidative damage levels. Supplemented women presented a 16% increase in HDL-cholesterol, without altering other parameters on lipid profile, showing the potential of white grape juice as an important ally in reducing the risk of cardiovascular diseases (sic).