GlobalRPh · Version 1.5 · Evidence reviewed August 2026

Resistant Starch Intake & Visceral Fat Support Calculator

Build a practical daily estimate from foods, cook–cool preparations, powders, and product-specific label values. Then generate a server-verified report and review the evidence linking resistant starch with abdominal adiposity, insulin sensitivity, liver fat, and gut-microbiome pathways.

Research boundary: 40 g/day RS2 has been used in selected human trials. It is not a universal intake recommendation, and this calculator does not predict how much visceral fat a person will lose.
22foods and ingredients
1–3×daily serving frequency
PHPserver-authoritative report
32linked source records
Resistant starch clinical review illustration

1. Build the resistant-starch estimate

Select an item, choose a household measure or gram amount, and choose 1–3 servings/day. Food groups are collapsible to keep the page manageable.

Practical measures: potato menus include 1 medium (~150 g) and 1 large (~300 g); green banana includes 1 medium (~126 g edible portion). These are convenience conversions, not new resistant-starch assays. [R27,R28]
Why ranges are retained: cultivar, ripeness, assay method, food matrix, processing, storage, and reheating can materially alter resistant starch. A range is more honest than false precision. [R5,R8-R12,R20,R21]
Oats & grains0 selected · 3 choices
Cold-soaked rolled oats; calculation uses uncooked-oat dry-weight assay as a proxy
Direct assay / proxyR8
Estimate notes

The cited assay tested uncooked oats, not a modern overnight-oats recipe. Gram selection is preferred for reproducibility.

—estimated RS/day
Cooked oats; calculation uses cooked-oat dry-weight assay
Direct assay / proxyR8
Estimate notes

Dry-oat amount is used because the cited value is reported on a dry-weight basis.

—estimated RS/day
Cooked grain; broad category estimate
Broader estimateR5
Estimate notes

Broad review-level range; cultivar, milling, and cooking can materially change RS.

—estimated RS/day
Rice & pasta0 selected · 5 choices
Freshly cooked
Direct assay / proxyR9
Estimate notes

Study-derived value: 0.64 g RS/100 g.

—estimated RS/day
Cooled 24 h at 4°C, then reheated
Direct assay / proxyR9
Estimate notes

Study-derived value: 1.65 g RS/100 g. Follow safe cooling/refrigeration practices.

—estimated RS/day
Cooked, cooled
Broader estimateR32
Estimate notes

Approximate range from the supplied article; pasta formulation and cooling method vary.

—estimated RS/day
Freshly cooked
Direct assay / proxyR11
Estimate notes

Study-derived value: 1.83 g RS/100 g.

—estimated RS/day
Cooled, then reheated
Direct assay / proxyR11
Estimate notes

Study-derived value: 3.65 g RS/100 g.

—estimated RS/day
Potatoes0 selected · 3 choices
Served hot (65°C study condition)
Direct assay / proxyR10
Estimate notes

Study-derived point estimate from the companion dataset.

—estimated RS/day
Chilled (4°C)
Direct assay / proxyR10
Estimate notes

Chilled potatoes contained more RS than hot or reheated potatoes in the cited study.

—estimated RS/day
Chilled, then reheated
Direct assay / proxyR10
Estimate notes

Study-derived point estimate from the companion dataset.

—estimated RS/day
Legumes0 selected · 4 choices
Cooked and cooled
Broader estimateR32
Estimate notes

Approximate range; variety and preparation materially affect RS.

—estimated RS/day
Cooked and cooled
Broader estimateR32
Estimate notes

Approximate range; variety and preparation materially affect RS.

—estimated RS/day
Cooked and cooled
Broader estimateR32
Estimate notes

Approximate range; variety and preparation materially affect RS.

—estimated RS/day
General legume category estimate
Broader estimateR5
Estimate notes

Use only when a more specific legume option is unavailable. The range is intentionally broad.

—estimated RS/day
Bread & whole foods0 selected · 1 choices
Commercial bread
Broader estimateR32
Estimate notes

Bread formulation varies widely; this is a low-confidence estimate.

—estimated RS/day
Green banana & plantain0 selected · 2 choices
Raw/unripe edible portion
Broader estimateR32
Estimate notes

Ripeness is critical: RS falls substantially as banana ripens. The range is an estimate, not a universal value.

—estimated RS/day
Raw/unripe edible portion
Broader estimateR32
Estimate notes

Ripeness and cultivar can cause large variation.

—estimated RS/day
Powders & isolated starches0 selected · 4 choices
Unheated powder (RS2)
Broader estimateR32
Estimate notes

Heating gelatinizes native potato starch and can sharply change the RS2 estimate. Gram measurement is preferred.

—estimated RS/day
Unripe banana flour; unheated
Analytical sourceR20
Estimate notes

Published flour values varied from 40.9% to 58.5% RS depending on drying conditions; product-specific values may differ.

—estimated RS/day
Dried raw banana powder; study-specific cultivar
Analytical sourceR21
Estimate notes

The 42.0% value is from one Musa sapientum cultivar and is not interchangeable with every retail green-banana powder.

—estimated RS/day
Purified banana starch; study-specific cultivar
Analytical sourceR21
Estimate notes

The 74.1% value applies to the isolated banana starch tested in the study, not generic banana flour.

—estimated RS/day
Add a commercial or label-declared resistant-starch product

Enter resistant-starch grams only when the product provides a directly usable RS value. Do not substitute total dietary-fiber grams. [R22-R25]

2. Add an evidence-based visceral-fat support plan

These selections are reported separately. The calculator does not add unrelated trial percentages or claim a combined predicted fat-loss effect.

Direct VAT evidence
Regular aerobic activity appropriate to fitness and medical status. Human randomized evidence supports exercise training for reducing visceral adipose tissue. [R13,R16,R30]
Meta-analysis of RCTs
If medically appropriate and sustainable, combined aerobic/resistance training or interval training can be alternatives; comparative rankings remain uncertain. [R16,R30]
VAT-gain prevention evidence
Avoid chronic sleep restriction. Experimental sleep restriction increased abdominal and visceral fat; this supports sleep as a risk-control target, not proof that extra sleep alone removes VAT. [R14]
Direct VAT RCT
Use a plant-forward Mediterranean pattern paired with sustainable energy balance and activity. [R15]
Direct VAT RCT; bundled intervention
Emphasize plant polyphenol sources such as walnuts and green tea and reduce red/processed meat. The trial does not isolate a single ingredient as the cause of VAT loss. [R15]
Supportive liver-fat evidence
Reduce ultra-processed foods as part of a sustainable weight-management pattern. [R17]
Supportive ectopic-fat evidence
Prefer nuts, seeds, olive oil, and fish in place of saturated-fat-heavy choices. [R18]
Monitoring only
Use a consistent waist-measurement method and follow the trend over time. This is not a treatment and does not substitute for CT/MRI measurement of VAT. [—]
Live total
0.0 g/day

Sample daily combinations around 40 g RS

These are research-context planning examples, not prescriptions. Household measures come first; gram equivalents are retained because the RS calculations ultimately depend on estimated weight. Powders vary by packing density and product, so a scale or verified product-specific RS value is preferable when precision matters.

Example 1: Food-forward + green-banana flour

  • Overnight oats: 3/4 cup dry (~60 g) → 9.66 g
  • Chilled cooked potato: 1 large potato (~300 g) → 12.81 g
  • Chickpea pasta, cooled + reheated: about 1 1/2 cups cooked (~180 g) → 6.57 g
  • White beans: 1 cup (~180 g) → 5.40–7.20 g
  • Green banana flour: 1 tbsp (~10 g) → 4.09–5.85 g
≈ 40.3 g midpoint
Estimated range 38.5–42.1 g/day

Example 2: Mixed foods + potato starch

  • Overnight oats: 1/2 cup dry (~40 g) → 6.44 g
  • Chilled potato: 1 medium potato (~150 g) → 6.41 g
  • Lentils: 1 cup (~200 g) → 4.00–6.00 g
  • Raw potato starch: 2 tbsp (~25 g) → 18.75–20.00 g
  • Cooled/reheated rice: 1 cup (~150 g) → 2.48 g
≈ 39.7 g midpoint
Estimated range 38.1–41.3 g/day

Example 3: Powder-forward research context

  • Raw potato starch: 2 tbsp (~25 g) → 18.75–20.00 g
  • Green banana flour: 2 tbsp (~20 g) → 8.18–11.70 g
  • Banana starch isolate: 1 1/2 tbsp (~15 g) → 11.12 g
≈ 40.4 g midpoint
Estimated range 38.0–42.8 g/day

Example 4: Whole-food dominant

  • Very green banana: 1 medium (~126 g edible) → 18.90–25.20 g
  • Overnight oats: 1/2 cup dry (~40 g) → 6.44 g
  • Chilled potato: 1 medium potato (~150 g) → 6.41 g
  • White beans: 1/2 cup (~90 g) → 2.70–3.60 g
  • Cooled/reheated rice: 1/2 cup (~75 g) → 1.24 g
≈ 39.3 g midpoint
Estimated range 35.7–42.9 g/day
Why the range may be wide: green banana ripeness, legume variety, household packing, powder density, assay method, and cooling history can all change delivered RS. The midpoint is simply the mathematical midpoint of the stated range.

Evidence summary: resistant starch, visceral fat, and body composition

The most defensible conclusion is promising but not universal: selected controlled trials using defined RS2 supplements and controlled background diets reported reductions in abdominal fat or body weight, while pooled randomized evidence remains heterogeneous. This calculator estimates resistant-starch intake; it does not predict a personal change in visceral fat.

Direct human signalSmall crossover trials reported lower MRI-measured visceral fat after 40 g/day RS2. [R6,R7]
Pooled evidenceA 2025 meta-analysis found a statistically significant waist reduction, but body-weight and fat-mass estimates crossed zero and heterogeneity was high. [R29]
Clinical boundaryTrial exposures, food mixtures, RS types, microbiomes, and preparation methods are not interchangeable. Forty grams/day is research context, not a universal target. [R12,R19,R29]
2019 · CROSSOVER RCT

Normal-weight adults

n = 19

40 g/day high-amylose RS2 for 4 weeks. Post-intervention VFA was 21.70 cm² after RS versus 27.05 cm² after control starch (P<.001); body weight did not significantly change. [R6]

Small, tightly controlled trial; findings should not be converted into an expected percentage loss for an individual.
2024 · CROSSOVER RCT

Overweight or obesity

−2.81 kg

40 g/day RS2 for 8 weeks. Net body-weight difference versus control was −2.81 kg (95% CI −3.55 to −2.07); MRI visceral fat was lower (P<.001), subcutaneous fat was lower (P=.004), and insulin sensitivity improved. [R7]

n=37 with a controlled, balanced background diet; broader generalizability remains uncertain.
2023 · PARALLEL RCT

NAFLD / liver fat

−9.08 points

In 196 participants, RS reduced intrahepatic triglyceride content by an absolute 9.08 percentage points versus control; the adjusted difference remained 5.89 points after accounting for weight loss. [R26]

This is ectopic liver-fat evidence, not a direct estimate of visceral-adipose-tissue loss.
2025 · META-ANALYSIS

Metabolic-risk populations

23 RCTs

Across 1,073 participants, pooled waist circumference favored RS by 2.58 cm, while pooled body weight and fat mass were not statistically significant. Outcome heterogeneity was substantial. [R29]

The review mixed RS types, doses, delivery forms, populations, and durations.

Preparation effect in cited food assays

Relative resistant starch within each food study. The comparison condition is normalized to 1.0. Bars should not be compared as absolute grams across foods.

Analytical inputs: oats 0.161 vs 0.028 g/g dry weight; rice 1.65 vs 0.64 g/100 g; potato 4.27 vs 3.00 g/100 g; chickpea pasta 3.65 vs 1.83 g/100 g. [R8-R11]

2025 pooled anthropometric effects

Diamond = pooled mean difference; line = 95% CI; vertical line = no difference. Outcome units differ, so compare direction and whether the CI crosses zero, not bar length across outcomes.

Source: 2025 systematic review/meta-analysis of randomized trials. [R29]

Interpretation: Waist circumference is a practical trend measure but is not equivalent to CT- or MRI-measured visceral adipose tissue. A lower waist can reflect changes in several abdominal compartments. The calculator never converts RS grams into an expected waist, weight, liver-fat, or VAT reduction.

Detailed mechanisms: how resistant starch may affect metabolic and visceral-fat pathways

Resistant starch is a substrate class, not one uniform molecule. The pathway begins with resistance to small-intestinal digestion, then depends on food structure, RS type, dose, background diet, and the person’s microbial community.

1

Escapes digestion

RS resists human small-intestinal amylase and reaches the colon. Cooking can destroy native RS2; cooling can create retrograded RS3. [R4,R5,R8-R11]

2

Selective microbial substrate

Different structures favor different degraders. Human metagenomics shows RS2 and RS4 produce distinct, transient, reversible community changes. [R12]

3

Metabolite and signaling shifts

Potential mediators include SCFAs, bile acids, branched-chain amino acids, and microbial functional pathways. The mix varies by person and RS type. [R1,R7,R12,R26]

4

Barrier, inflammation, absorption

Human associations and translational experiments support effects on gut integrity, inflammatory signaling, ANGPTL4, and intestinal lipid absorption. [R7]

5

Potential downstream outcomes

Specific trials reported improved insulin sensitivity, lower abdominal fat, or lower liver fat. These outcomes are not guaranteed and cannot be predicted from an intake estimate alone. [R6,R7,R26,R29]

Human physiology + mechanistic literature

SCFAs and enteroendocrine signaling

Microbial fermentation can generate acetate, propionate, and butyrate. These metabolites can support colonocyte energetics, epithelial integrity, immune regulation, and FFAR2/FFAR3-linked enteroendocrine signaling, including GLP-1 pathways. [R1-R3]

Important nuance: in the 2024 weight-loss trial, fecal acetate, propionate, and butyrate did not significantly differ between RS and control. SCFAs are biologically plausible mediators, but they are not the only supported pathway and should not be presented as the sole explanation. [R7]

Human association + metabolomics

Bile acids and microbial responders

The 2024 trial linked RS-induced microbiome changes to altered bile-acid profiles. Bifidobacterium adolescentis abundance was associated with improvements in BMI and visceral fat, but association in humans does not by itself prove that one species caused the clinical effect. [R7]

New 2026 metagenomic work reinforces substrate specificity: RS2 enriched Ruminococcus bromii and showed strain-level differences in B. adolescentis, while RS4 favored a different microbial pattern. [R12]

Human biomarker + animal/FMT mechanism

Gut barrier and inflammatory tone

The 2024 trial reported lower inflammatory markers, while fecal-microbiota-transfer and mouse experiments supported improved tight-junction signaling, lower lipopolysaccharide exposure, and suppression of inflammatory pathways. These experiments strengthen causal plausibility but do not prove the identical pathway operates to the same degree in every person. [R7]

Human biomarker + animal/FMT mechanism

ANGPTL4, lipid absorption, and FGF21

RS increased circulating ANGPTL4 and fecal lipids in the 2024 human study. Translational experiments suggested RS-shaped microbiota could increase intestinal ANGPTL4, lower luminal lipase activity, and reduce lipid absorption. The study also reported findings consistent with improved FGF21 sensitivity, with deeper causal testing performed in mice. [R7]

Human randomized evidence

Insulin sensitivity and ectopic fat

Improved insulin sensitivity was observed in the 2024 crossover trial. A separate 2023 randomized trial in NAFLD showed a large reduction in intrahepatic triglyceride content with RS, associated with microbiome and branched-chain-amino-acid changes. Liver fat and visceral fat are related metabolic compartments but are not interchangeable endpoints. [R7,R26]

Heterogeneity / precision nutrition

Why some people respond differently

Baseline microbial genes and species, RS structure, background dietary fat and fiber, adherence, dose, and duration can all influence fermentation and downstream effects. RS2, RS3, and RS4 should not be treated as biologically identical. Current evidence supports personalization as a research direction, not routine microbiome testing to select a product. [R7,R12,R19,R29]

Practical translation: Favor food-first diversity where feasible, increase fermentable substrates gradually, and use standardized powders cautiously. A 2022 systematic review found RS was generally tolerated across studied populations, but gastrointestinal symptoms and individual variability remain clinically important. [R31]

Powders, isolates, and commercial resistant-starch products

“Potato starch,” “green banana flour,” “banana starch,” high-amylose maize RS2, RS4 resistant wheat starch, resistant tapioca starch, resistant maltodextrin, and total dietary fiber are not interchangeable terms. The calculator hard-codes an estimate only when a directly usable analytical source is available.

Ingredient or product typeWhat can be usedHow the calculator handles it
Raw potato starchUnheated native potato starch can be rich in RS2, but brand, moisture, packing density, and heating matter.Uses a broad 75%–80% estimate from the supplied companion material; gram measurement is preferred.
Green banana flourPublished analytical values vary materially with processing and drying.Uses a 40.9%–58.5% analytical range. [R20]
Banana starch isolateA study-specific purified isolate tested at 74.1% RS.Kept separate from ordinary banana flour and labeled study-specific. [R21]
Commercial RS2/RS4/tapioca productsUse product-specific measured RS grams or a validated RS percentage.Enter through the custom field. Total dietary-fiber grams are not automatically converted to RS grams. [R22-R25]
Resistant maltodextrin/dextrinFDA may recognize it as dietary fiber, but it is not synonymous with resistant starch.Not counted unless the specific product documents resistant-starch content. [R25]

Implementation and safety

Start lowLarge abrupt increases can cause gas, bloating, cramping, or stool changes. Split servings and increase gradually. [R31]
Keep food safeCool cooked foods promptly, refrigerate safely, and reheat appropriately. Food safety takes priority over maximizing retrogradation.
IndividualizePeople with significant GI disease, diabetes medications, pregnancy, frailty, or other relevant conditions should discuss high-dose changes with a clinician.

Food-first diversity may improve nutritional quality and distribute fermentation across meals. Standardized ingredients can make higher RS exposures easier to quantify, but they also concentrate the fermentable load and can create false precision when a product’s true RS content is unknown.

References

Each reference is kept in one paragraph. Product/manufacturer documents are used only for ingredient identity or labeling context, not as proof of clinical benefit. R32 identifies the GlobalRPh companion article behind choices explicitly labeled as broader estimates; those values are not presented as direct assay equivalents.

R1. Koh A, De Vadder F, Kovatcheva-Datchary P, Bäckhed F. From dietary fiber to host physiology: short-chain fatty acids as key bacterial metabolites. Cell. 2016;165(6):1332-1345. doi:10.1016/j.cell.2016.05.041. PMID:27259147. Source

R2. Tolhurst G, Heffron H, Lam YS, et al. Short-chain fatty acids stimulate glucagon-like peptide-1 secretion via the G-protein-coupled receptor FFAR2. Diabetes. 2012;61(2):364-371. doi:10.2337/db11-1019. PMID:22190648. Source

R3. Park J, Kim M, Kang SG, et al. Short-chain fatty acids induce both effector and regulatory T cells by suppression of histone deacetylases and regulation of the mTOR-S6K pathway. Mucosal Immunol. 2015;8(1):80-93. doi:10.1038/mi.2014.44. PMID:24917457. Source

R4. Birt DF, Boylston T, Hendrich S, et al. Resistant starch: promise for improving human health. Adv Nutr. 2013;4(6):587-601. doi:10.3945/an.113.004325. PMID:24228189. Source

R5. Patterson MA, Maiya M, Stewart ML. Resistant starch content in foods commonly consumed in the United States: a narrative review. J Acad Nutr Diet. 2020;120(2):230-244. doi:10.1016/j.jand.2019.10.019. PMID:32040399. Source

R6. Zhang L, Ouyang Y, Li H, et al. Metabolic phenotypes and the gut microbiota in response to dietary resistant starch type 2 in normal-weight subjects: a randomized crossover trial. Sci Rep. 2019;9:4736. doi:10.1038/s41598-018-38216-9. PMID:30894560. Source

R7. Li H, Zhang L, Li J, et al. Resistant starch intake facilitates weight loss in humans by reshaping the gut microbiota. Nat Metab. 2024;6(3):578-597. doi:10.1038/s42255-024-00988-y. PMID:38409604. Source

R8. Muir JG, O’Dea K. Measurement of resistant starch: factors affecting the amount of starch escaping digestion in vitro. Am J Clin Nutr. 1992;56(1):123-127. doi:10.1093/ajcn/56.1.123. Source

R9. Sonia S, Witjaksono F, Ridwan R. Effect of cooling of cooked white rice on resistant starch content and glycemic response. Asia Pac J Clin Nutr. 2015;24(4):620-625. doi:10.6133/apjcn.2015.24.4.13. PMID:26693746. Source

R10. Raatz SK, Idso L, Johnson LK, Jackson MI, Combs GF Jr. Resistant starch analysis of commonly consumed potatoes: content varies by cooking method and service temperature but not by variety. Food Chem. 2016;208:297-300. doi:10.1016/j.foodchem.2016.03.120. PMID:27132853. Source

R11. Bojarczuk A, Kęszycka P, Marszałek K, Gajewska D. The effect of cooking and cooling chickpea pasta on resistant starch content, glycemic response, and glycemic index in healthy adults. Metabolites. 2024;14(11):585. doi:10.3390/metabo14110585. Source

R12. Piperni E, Blanco-Míguez A, Mengoni C, et al. Resistant starch types 2 and 4 induce distinct and reversible changes in the human gut microbiome. Microbiol Spectr. Published online July 24, 2026. doi:10.1128/spectrum.00763-26. PMID:42496113. Source

R13. Wedell-Neergaard AS, Lehrskov LL, Christensen RH, et al. Exercise-induced changes in visceral adipose tissue mass are regulated by IL-6 signaling: a randomized controlled trial. Cell Metab. 2019;29(4):844-855.e3. doi:10.1016/j.cmet.2018.12.007. PMID:30595477. Source

R14. Covassin N, Singh P, McCrady-Spitzer SK, et al. Effects of experimental sleep restriction on energy intake, energy expenditure, and visceral obesity. J Am Coll Cardiol. 2022;79(13):1254-1265. doi:10.1016/j.jacc.2022.01.038. PMID:35361348. Source

R15. Zelicha H, Klöting N, Kaplan A, et al. The effect of high-polyphenol Mediterranean diet on visceral adiposity: the DIRECT PLUS randomized controlled trial. BMC Med. 2022;20(1):327. doi:10.1186/s12916-022-02525-8. PMID:36175997. Source

R16. Xu W, Xie X, Liu H. Optimal exercise modality and dose for reducing visceral adipose tissue in overweight or obese adults: a network meta-analysis and dose-response study. BMC Sports Sci Med Rehabil. Published online June 9, 2026. doi:10.1186/s13102-026-01793-8. PMID:42260656. Source

R17. Bo S, Armandi A, Castelnuovo G, et al. Impact of weight loss and reduction of ultra-processed foods on liver fat content in MASLD: a randomized controlled trial. JHEP Rep. Published online June 22, 2026:101929. doi:10.1016/j.jhepr.2026.101929. PMID:42331287. Source

R18. Rosqvist F, Kullberg J, Ståhlman M, et al. Overeating saturated fat promotes fatty liver and ceramides compared with polyunsaturated fat: a randomized trial. J Clin Endocrinol Metab. 2019;104(12):6207-6219. doi:10.1210/jc.2019-00160. PMID:31369090. Source

R19. Snelson M, Jong J, Manolas D, et al. Metabolic effects of resistant starch type 2: a systematic literature review and meta-analysis of randomized controlled trials. Nutrients. 2019;11(8):1833. doi:10.3390/nu11081833. PMID:31398841. Source

R20. Tribess TB, Hernández-Uribe JP, Méndez-Montealvo MGC, Menezes EW, Bello-Pérez LA, Tadini CC. Thermal properties and resistant starch content of green banana flour (Musa cavendishii) produced at different drying conditions. LWT Food Sci Technol. 2009;42(5):1022-1025. doi:10.1016/j.lwt.2008.12.017. Source

R21. Jaiturong P, Laosirisathian N, Sirithunyalug B, et al. Physicochemical and prebiotic properties of resistant starch from Musa sapientum Linn., ABB group, cv. Kluai Namwa Luang. Heliyon. 2020;6(12):e05789. doi:10.1016/j.heliyon.2020.e05789. PMID:33376829. Source

R22. Ingredion. HI-MAIZE® resistant starch product overview. Current manufacturer information. High-amylose maize RS2 ingredient; dietary-fiber values are not automatically treated by this calculator as measured RS grams. Source

R23. MGP Ingredients. Fibersym® RW resistant wheat starch. Current manufacturer information. RS4 ingredient; manufacturer reports total dietary fiber, which this calculator does not automatically equate with RS grams. Source

R24. ADM. Resistant tapioca starch product information. Manufacturer reports high dietary-fiber content; this calculator requires a product-specific RS value before adding it to the RS total. Source

R25. U.S. Food and Drug Administration. Guidance for Industry: The Declaration of Certain Isolated or Synthetic Non-Digestible Carbohydrates as Dietary Fiber on Nutrition and Supplement Facts Labels. FDA guidance; dietary fiber terminology is broader than resistant starch. Source

R26. Ni Y, Qian L, Leal Siliceo S, et al. Resistant starch decreases intrahepatic triglycerides in patients with NAFLD via gut microbiome alterations. Cell Metab. 2023;35(9):1530-1547.e8. doi:10.1016/j.cmet.2023.08.002. PMID:37673036. Source

R27. U.S. Food and Drug Administration. Nutrition Information for Raw Vegetables. FDA reference portion: 1 medium potato = 148 g raw edible weight. Accessed August 10, 2026. Source

R28. U.S. Food and Drug Administration. Nutrition Information for Raw Fruits. FDA reference portion: 1 medium banana = 126 g raw edible weight. Accessed August 10, 2026. Source

R29. Lin X, Li Z, Zheng D, Du R, Zhong R, Lin C, Meng H. Effects of resistant starch consumption on anthropometric and serum parameters in adults with metabolic syndrome-related risks: a systematic review and meta-analysis. Front Nutr. 2025;12:1655664. doi:10.3389/fnut.2025.1655664. PMID:41080169. Source

R30. Chen X, He H, Xie K, Zhang L, Cao C. Effects of various exercise types on visceral adipose tissue in individuals with overweight and obesity: a systematic review and network meta-analysis of 84 randomized controlled trials. Obes Rev. 2024;25(3):e13666. doi:10.1111/obr.13666. PMID:38031812. Source

R31. Sobh M, Montroy J, Daham Z, et al. Tolerability and SCFA production after resistant starch supplementation in humans: a systematic review of randomized controlled studies. Am J Clin Nutr. 2022;115(3):608-618. doi:10.1093/ajcn/nqab402. PMID:34871343. Source

R32. GlobalRPh. Resistant Starch and Short-Chain Fatty Acids: A Comprehensive Review of Physiologic Mechanisms and Clinical Relevance. Published January 2026. Companion article used only for choices explicitly labeled as broader food or powder estimates; primary analytical studies are cited separately whenever available. Accessed August 10, 2026. Source