Gut & Microbiome
Does the type of resistant starch change which gut benefits you get?
The claim, precisely: resistant starch structural type determines SCFA profile and enriched taxa
Strong support Gut & Microbiome
RefutedContestedStrong support
consensus score 1.00
Yes — different starch types reliably feed different bacteria and compounds.
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: Human trials (RCT / n-of-1)
MechanismIn-vitroAnimalObservationalRCTMeta-analysis
How the studies fall
7 support 0 contradict 0 tested null 0 mixed · 6 sources, 6 independent groups
What the evidence shows
RS type is a design lever: RS3 (retrograded/cook-and-cool) yields the most butyrate (anti-inflammatory, fat-oxidation SCFA) and enriches Roseburia; RS2 leans acetate/propionate + Ruminococcus; RS5 feeds Bifidobacterium.
The evidence (7)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Zhang 2024 2024 · Carbohydr Polym | in-vitro | supports | moderate | [FT-verified] RS structural variation changes butyrate output+producer taxa |
| Li 2024 · Int J Biol Macromol | in-vitro | supports | moderate | RS5 from different starches gave distinct SCFA profiles; only Canna edulis enriched Bifidobacterium |
| Martinez 2010 · PLoS ONE | RCT | supports | moderate | [FT-verified] human crossover RS2 vs RS4 distinct taxa shifts |
| Wang Y, et al. 2026 · Food Chem | in-vitro | supports | moderate | RS3 highest butyrate+valerate (Roseburia); RS2 highest acetate+propionate (Ruminococcus); RS5 Bifidobacterium |
| Hughes 2021 · Nutrients | RCT | supports | moderate | [FT-verified] RS2 wheat vs maize source/structure shapes taxa+glycemia |
| Li 2021 · Int J Biol Macromol | in-vitro | supports | moderate | [FT-verified] native vs cooled Banxia starch differ SCFA+microbiota |
| Wang Y, et al. 2026 · Food Chem | in-vitro | supports | moderate | fecal fermentation RS2->acetate/propionate+Ruminococcus RS3->butyrate+Roseburia RS5->Bifidobacterium - exact claim match |
Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.