The acute effects of inulin and resistant starch on postprandial serum short-chain fatty acids and second-meal glycemic response in lean and overweight humans.

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  • Additional Information
    • Source:
      Publisher: Nature Publishing Group Country of Publication: England NLM ID: 8804070 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1476-5640 (Electronic) Linking ISSN: 09543007 NLM ISO Abbreviation: Eur J Clin Nutr Subsets: MEDLINE
    • Publication Information:
      Publication: <2003->: London : Nature Publishing Group
      Original Publication: London : J. Libbey, c1988-
    • Subject Terms:
      Fatty Acids, Volatile/*blood ; Inulin/*pharmacology ; Overweight/*drug therapy ; Postprandial Period/*drug effects ; Starch/*pharmacology; Adolescent ; Adult ; Aged ; Blood Glucose/drug effects ; Cross-Over Studies ; Female ; Humans ; Ideal Body Weight/physiology ; Insulin/blood ; Male ; Meals/drug effects ; Middle Aged ; Overweight/blood ; Starch/analogs & derivatives ; Young Adult
    • Abstract:
      Background/objectives: Colonic fermentation of dietary fiber to short-chain fatty acids (SCFA) may protect against obesity and diabetes, but excess production of colonic SCFA has been implicated in the promotion of obesity. We aimed to compare the effects of two fermentable fibers on postprandial SCFA and second-meal glycemic response in healthy overweight or obese (OWO) vs lean (LN) participants.
      Subjects/methods: Using a randomized crossover design, 13 OWO and 12 LN overnight fasted participants were studied for 6 h on three separate days after consuming 300 ml water containing 75 g glucose (GLU) as control or with 24 g inulin (IN) or 28 g resistant starch (RS). A standard lunch was served 4 h after the test drink.
      Results: Within the entire group, compared with control, IN significantly increased serum SCFA (P<0.001) but had no effect on free-fatty acids (FFA) or second-meal glucose and insulin responses. In contrast, RS had no significant effect on SCFA but reduced FFA rebound (P<0.001) and second-meal glucose (P=0.002) and insulin responses (P=0.024). OWO had similar postprandial serum SCFA and glucose concentrations but significantly greater insulin and FFA than LN. However, the effects of IN and RS on SCFA, glucose, insulin and FFA responses were similar in LN and OWO.
      Conclusions: RS has favorable second-meal effects, likely related to changes in FFA rather than SCFA concentrations. However, a longer study may be needed to demonstrate an effect of RS on SCFA. We found no evidence that acute increases in SCFA after IN reduce glycemic responses in humans, and we were unable to detect a significant difference in SCFA responses between OWO vs LN subjects.
      Competing Interests: The authors declared no conflict of interest
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    • Grant Information:
      64648-1 Canada Canadian Institutes of Health Research; 486906 Canada CIHR
    • Molecular Sequence:
      ClinicalTrials.gov NCT02562014
    • Accession Number:
      0 (Blood Glucose)
      0 (Fatty Acids, Volatile)
      0 (Insulin)
      9005-25-8 (Starch)
      9005-80-5 (Inulin)
    • Publication Date:
      Date Created: 20161215 Date Completed: 20180110 Latest Revision: 20240313
    • Publication Date:
      20240313
    • Accession Number:
      PMC5298923
    • Accession Number:
      10.1038/ejcn.2016.248
    • Accession Number:
      27966565