Soluble fibre
Metabolic
Blunts glucose response and adds satiety — the least glamorous, best-supported intervention here.
What the evidence says
Very large human evidence for glycaemic response, lipids and satiety. Whole-food fibre beats a scoop, but the scoop counts.
What studies used
Work toward 25–35 g total daily fibre from all sources. With meals.
Reported from published studies and product labelling — a record of what was used in research, not a recommendation. What is right for you is a conversation with a clinician.
Evidence base
substantial literature
Strong human evidence: either a phase 3 or 4 trial report alongside review-level evidence, or ten or more randomised controlled trial reports.
This letter measures how much human research exists, not whether it works for you — the tier above (Strong) is the read on quality.
Research (12)
- Understanding the Physics of Functional Fibers in the Gastrointestinal Tract: An Evidence-Based Approach to Resolving Enduring Misconceptions about Insoluble and Soluble FiberJ Acad Nutr Diet · 2017
- Hemorrhoids: from basic pathophysiology to clinical managementWorld J Gastroenterol · 2012
- The effect of dietary fiber supplement on prevention of gestational diabetes mellitus in women with pre-pregnancy overweight/obesity: A randomized controlled trialFront Pharmacol · 2022
- Hemorrhoidectomy2026
- The Association between Prebiotic Fiber Supplement Use and Colorectal Cancer Risk and Mortality in the Women's Health InitiativeCancer Epidemiol Biomarkers Prev · 2019
- Effects of different dietary fiber supplement strategies on incidence of acute gastrointestinal injury in ICU patients: A prospective observational studyIntensive Crit Care Nurs · 2024
- Dietary fiber and weight regulationNutr Rev · 2001
- Evaluation of an Ionic Calcium Fiber Supplement and Its Impact on Bone Health Preservation in a Dietary Calcium Deficiency Mice ModelNutrients · 2022
- Wheat bran, as the resource of dietary fiber: a reviewCrit Rev Food Sci Nutr · 2022
- Beyond Insoluble Dietary Fiber: Bioactive Compounds in Plant FoodsNutrients · 2023
- Determining compliance with a dietary fiber supplementJ Natl Cancer Inst · 1986
- Effects of a slowly fermentable fiber mixture against the background of a high-protein diet on insulin sensitivity and metabolic health in individuals with overweight: a randomized, placebo-controlled trialGut Microbes · 2026
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