BackgroundSoybean is termed a functional food because it contains bioactive compounds. However, its effects are not well known under unbalanced diet conditions. This work is aimed at evaluating the effect of adding whole soy flour to a cafeteria diet on intestinal histomorphometry, metabolic risk and toxicity markers in rats.MethodsIn this study, 30 male adult Wistar rats were used, distributed among three groups (n = 10): AIN-93 M diet, cafeteria diet (CAF) and cafeteria diet with soy flour (CAFS), for 56 days. The following parameters were measured: food intake; weight gain; serum concentrations of triglycerides, total cholesterol, HDL-c, glycated hemoglobin (HbA1c), aspartate (AST) and alanine (ALT) aminotransferases and Thiobarbituric Acid Reactive Substances (TBARS); humidity and lipid fecal content; weight and fat of the liver. The villous height, the crypt depth and the thickness of the duodenal and ileal circular and longitudinal muscle layers of the animals were also measured.ResultsThere was a significant reduction in the food intake in the CAF group. The CAFS showed lower serum concentrations of triglycerides and serum TBARS and a lower percentage of hepatic fat, with a corresponding increase in thickness of the intestinal muscle layers. In the CAF group, an increase in the HbA1c, ALT, lipid excretion, liver TBARS and crypt depth, was observed associated with lower HDL-c and villous height. The addition of soy did not promote any change in these parameters.ConclusionsThe inclusion of whole soy flour in a high-fat diet may be helpful in reducing some markers of metabolic risk; however, more studies are required to clarify its effects on unbalanced diets.
The conjoint analysis of factors was used employed to develop a label for the packaging of milk with increased concentration of melatonin. Three factors were selected with three or two levels for the assembly of packaging: packaging design ("blue design with stars and pouring milk", "white without drawing" and "blue stars with and without drawing"), name ("milk night "and" melatonin ") and informative text about getting natural melatonin by night milking, and the benefits of this compound ("with" and "without"). Twelve packaging designs were created based on a complete factorial arrangement. The designs were presented to 144 consumers who were asked to assess purchase intent of each package. For the joint analysis of factors, the ideal product or more likely to purchase for the most consumers would be blue with stars and packaging design of milk pouring, named milk night and in the presence of informational text, demonstrating that consumers like a package that brings the product and that contains information described. Therefore, the packaging has a major influence on consumer choice and can contribute positively or negatively to the acceptance of food.
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