Effects of brown seaweeds on postprandial glucose, insulin and appetite in humans - A randomized, 3-way, blinded, cross-over meal study

Research output: Contribution to journalJournal articleResearchpeer-review

  • Nazikussabah Binti Zaharudin
  • Mikkel Tullin
  • Ceyda Tugba Pekmez
  • Jens J Sloth
  • Rie R Rasmussen
  • Dragsted, Lars Ove
Background & aims: Seaweed including brown seaweeds with rich bioactive components may be efficacious for a glycaemic management strategy and appetite control. We investigated the effects of two brown edible seaweeds, Laminaria digitata (LD) and Undaria pinnatifida (UP), on postprandial glucose metabolism and appetite following a starch load in a human meal study.

Methods: Twenty healthy subjects were enrolled in a randomized, 3-way, blinded cross-over trial. The study was registered under ClinicalTrials.gov Identifier no. NCT00123456. At each test day, the subjects received one of three meals comprising 30 g of starch with 5 g of LD or UP or an energy-adjusted control meal containing pea protein. Fasting and postprandial blood glucose, insulin, C-peptide and glucagon-like peptide-1 (GLP-1) concentrations were measured. Subjective appetite sensations were scored using visual analogue scales (VAS).

Results: Linear mixed model (LMM) analysis showed a lower blood glucose, insulin and C-peptide response following the intake of LD and UP, after correction for body weight. Participants weighing ≤ 63 kg had a reduced glucose response compared to control meal between 40 and 90 min both following LD and UP meals. Furthermore, LMM analysis for C-peptide showed a significantly lower response after intake of LD. Compared to the control meal, GLP-1 response was higher after the LD meal, both before and after the body weight adjustment. The VAS scores showed a decreased appetite sensation after intake of the seaweeds. Ad-libitum food intake was not different three hours after the seaweed meals compared to control.

Conclusions: Concomitant ingestion of brown seaweeds may help improving postprandial glycaemic and appetite control in healthy and normal weight adults, depending on the dose per body weight.

Clinical trial registry number: Clinicaltrials.gov (ID# NCT02608372).
Original languageEnglish
JournalClinical Nutrition
Issue number3
Pages (from-to)830-838
Number of pages9
Publication statusPublished - 2021

    Research areas

  • Faculty of Science - Bioactive foods, Glycaemic response, Satiety, Resistant dietary fibers, Starch-degrading enzymes, Alpha-glucosidase

ID: 248549575