Effect of resistant starch consumption on body weight and blood lipid profiles
Dyslipidemia is characterized by an abnormal amount of lipids in the blood and can be improved through lowered body weight. In this study, we hypothesized that resistant starch prepared from high amylose corn (HAM-RS2), would improve plasma lipid profile, and decrease body weight in overweight/obese individuals. In a randomized, double blind study we have examined the effects of consuming resistant starch muffins with 30 gram RS/day from HAM-RS2 (treatment, T; N= 13) or fully-digestible carbohydrate (control, C; N=7) on blood lipid levels and body weight. A total of 20 overweight males (15%) and females (85%) have completed the study. Plasma was collected after an overnight fast for determination of various lipid parameters at baseline and six weeks later. Data analysis using SPSS indicated that body weight, plasma total cholesterol, triglycerides, high-density lipoprotein, and low-density lipoprotein levels did not change significantly between C and T groups (p>0.05). In the T group, there was a small, but significant decrease (p<0.05) in body mass index and increase in hip circumference between baseline and end of study. A larger sample size and longer study duration are probably needed to determine the true impact of RS in blood lipid levels and body weight in overweight/obese individuals.