Effects of Inulin and Resistant Starch on Postprandial SCFA, Glucose, Insulin, and Gut Hormone Responses in Lean and Overweight Subjects

This study explores how two types of fermentable fibers, inulin and resistant starch, affect certain body responses in lean and overweight or obese individuals. The body naturally breaks down these fibers into short-chain fatty acids (SCFA), which have been linked to both obesity promotion and diabetes prevention. By comparing the effects of these fibers, the study aims to understand their role in health and disease better. This research is particularly important as it could help improve our understanding of how dietary fiber impacts metabolism and potentially lead to new strategies for managing obesity and diabetes. During this study, participants from both lean and overweight/obese groups consume a drink containing either glucose alone or glucose combined with either inulin or resistant starch. This happens on three separate occasions, following a randomized, single-blind design. The study measures the body's responses, specifically focusing on short-chain fatty acids, glucose, insulin, free fatty acids, and gut hormones. Participants also receive a standard lunch four hours after consuming the test drink. The primary outcome of interest is the incremental area under the serum acetate response curve, which is a measure of how much acetate, a type of short-chain fatty acid, is produced over time.