ClearFiber Powder (SunFiber®) — 3 g Soluble Fiber, Powder — Supports Digestive Health*
Are you tired of bloating or irregularity that throws off your day? LifeSource Vitamins ClearFiber Powder (SunFiber®) combines a clinically studied, tasteless form of partially hydrolyzed guar gum designed to keep your digestion running smoothly every day. This gentle soluble prebiotic fiber helps promote regularity*, nourish beneficial gut bacteria*, and ease occasional bloating — without grit or flavor*. Backed by NIH-indexed human studies and produced in FDA-registered, GMP-certified facilities, ClearFiber offers a simple, effective way to restore balance and support long-term digestive wellness.*
Research-Driven & Verified Product.
Explore the clinical research, ingredient science, and global evidence supporting this product below.
Research Promise: At LifeSource Vitamins, our commitment is rooted in research and results. Every benefit below is supported by human clinical studies indexed in the National Institutes of Health (NIH) via PubMed, with full texts available in the National Library of Medicine (NLM) PubMed Central (PMC) when available. We also reference reviews from 39 leading health organizations and insights from 20 top global universities to keep our guidance aligned with credible, evidence-based science.* Every claim is supported by peer-reviewed human RCTs or meta-analyses whenever available.
Clinically Studied Benefits
✓ Improves stool form and normalizes bowel habits in adults* — PHGG significantly improved Bristol Stool Scale vs placebo.*
NIH/PMC — Yasukawa Z., 2019
✓ Reduces laxative use in older adults with constipation* — 4-week PHGG reduced laxative dependence vs placebo in LTC residents.*
NIH/PMC — Chan T.C., 2022
✓ Eases IBS-related bloating* — 6 g/day PHGG improved symptoms vs placebo in RCT.*
NIH/PMC — Niv E., 2016
✓ Fosters beneficial microbiota (↑Bifidobacterium)* — Associated with better stool quality.*
NIH/PubMed — Yasukawa Z., 2019
✓ Supports healthy total and LDL cholesterol* — Human trials/meta-analyses show reductions with guar/PHGG.*
NIH/PubMed — Lin J., 2021
✓ Helps post-meal glucose control* — Soluble guar fibers slow carbohydrate absorption (human/clinical context discussed).*
NIH/PMC — Rideout T.C., 2008
✓ Better tolerance vs many fermentable fibers* — Low-gas profile associated with fewer GI complaints.*
NIH/PubMed — Rahimi R., 2021
✓ Constipation + patient-reported outcomes improved with PHGG in IBS-C cohorts* — Clinical support.*
NIH/PMC — Russo L., 2015
✓ Pediatric functional GI support* — PHGG improved symptoms in children with CAP/IBS.*
NIH/PMC — Romano C., 2013
✓ Linked improvements in constipation may co-occur with better mental well-being* — Pilot human data.*
NIH/PMC — Abe A., 2023
Additional / Promising Evidence
✓ May enhance satiety* — Fiber can increase fullness and support dietary goals.*
NIH/PMC — Sadeghi M., 2021
✓ May support gut-barrier integrity* — Prebiotic fibers are linked with healthier intestinal lining.*
NIH/PMC — Namavar Jahromi B., 2021
✓ Apple-derived fibers may aid cardiometabolic markers in adults* — Evidence from studies.*
NIH/PMC — Gayer J., 2016
✓ Enzyme blends are used clinically to assist macronutrient breakdown alongside diet* — Supportive context.*
NIH/PubMed — Martindale R.G., 2015
✓ Prune intake is associated with stool frequency improvements in adults* — Human evidence.*
NIH/PubMed — Lever E., 2019
✓ Sea-vegetable fibers (kelp) supply alginates with gel-forming properties supportive of GI comfort* — Review evidence.*
NIH/PMC — Brownlee I.A., 2016
University-Led & Academic Studies
✓ Summarize soluble fiber’s roles in lipid and glycemic control* — Harvard-cited analyses.*
NIH/PMC — Rideout T.C., 2008
✓ Report microbiota improvements with prebiotic fiber intake* — University studies.*
NIH/PMC — Razavi S.M., 2021
Global Evidence & Reviews
✓ Soluble fiber for digestive health and cardiometabolic markers* — Cochrane-indexed and NIH-indexed reviews.*
NIH/PubMed — McRae M.P., 2022
We monitor research from leading institutions —
Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, Tufts, University of Florida, Oregon State University – Linus Pauling Institute, Columbia, Cornell, Ohio State — to align with credible science.*
Key Ingredients
- SunFiber® (Partially Hydrolyzed Guar Gum)* — Prebiotic soluble fiber that supports regularity* & microbiome balance*.
Brief Benefit Bullets
- Supports digestive comfort & regularity*
- Normalizes stool form; gentle, low-gas tolerance profile*
- Prebiotic fiber that nourishes beneficial gut bacteria*
- Helps maintain healthy LDL and post-meal glucose within normal ranges*
- Dissolves clearly with no grit or flavor*
Suggested Use
As a dietary supplement, add 1 scoop (included, 10 g) to a full glass of water or beverage of choice. Mix well by stirring, blending, or shaking and drink immediately. Begin usage gradually to allow your system to adjust to the increase of fiber in your diet. Do not use in carbonated beverages. Consume with adequate liquid.*
Product Specifications
- Serving Size — 1 scoop (10 g)
- Servings Per Container — 30
- Form — Powder
- Free From — Non-GMO, gluten-free, vegan*
- Contains No — artificial colors, flavors, or preservatives; no wheat, gluten, milk, eggs, peanuts, sesame, tree nuts, soy, crustacean shellfish, or fish (per label)
LifeSource Vitamins — Proudly American — Since 1992
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
ClearFiber Powder (SunFiber®) supports digestive comfort, regularity & gut microbiome health. 10.5 oz, vegan, non-GMO. Clinically Studied Ingredients — NIH/PubMed!*
