Metabolic & Cardiometabolic
Does fibre help your body respond to its own appetite hormone?
The claim, precisely: dietary fiber decreases GLP-1 resistance
Probably yes as a mechanism, but only shown in the lab and cells so far, not in people.
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: Cells in a dish (In-vitro)
How the studies fall
What the evidence shows
Fiber/beta-glucan maintain tight junctions (occludin, ZO-1), lowering LPS translocation and endotoxemia, which de-represses GLP-1 signaling (GPR41/43, FXR, TGR5). Directly names a fiber already in the bakery program — a defensible 'reduce GLP-1 resistance' hypothesis, but review-grade.
The evidence (3)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Christiansen 2018 2018 · Am J Physiol GI | in-vitro | supports | moderate | SCFAs stimulate colonic GLP-1 secretion (ex-vivo) |
| van der Beek 2018 2018 · Metabolism | RCT | mixed | moderate | inulin raised SCFA/substrate metabolism; GLP-1 effect modest/inconsistent |
| Ali et al. 2026 · Int J Biol Macromol | mechanism | supports | low | Bioactive polysaccharides (beta-glucan) -> tight-junction maintenance -> lower LPS -> support GLP-1 |
Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.