Effect of resistant starch intake on satiety, bowel habits, and total calorie, macronutrient and fiber intake
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The purpose of this study was to determine the effect of resistant starch (RS) intake on satiety, bowel habits and intake of energy, macronutrient and fiber. Twenty physically inactive, otherwise healthy participants, aged 18-50 years, with BMI between 27-35 kg/m2, were randomly assigned to one of two groups. While participants in the treatment group (n=13) consumed muffins supplemented with 10 grams RS, control participants (n=7) consumed muffins with no additional RS for a period of six weeks. Satiety was measured at baseline and end of treatment using a visual analog scale; and participants recorded a three-day food journal and bowel habit log at baseline, midpoint and final time point. RS intake did not significantly change perceived satiety, bowel habits, or energy or macronutrient intake. However, participants in the treatment group recorded significantly greater fiber intake at the end of the study when compared to baseline (p=0.002) as well as compared to the control group (p<0.001). The result suggests that added RS increases fiber intake without increasing total energy intake, which will be beneficial for increasing daily intake to the recommended range.