ClearFiber Powder (SunFiber®) — 3 g Soluble Fiber, Powder, — Supports Digestive Health*
LifeSource Vitamins ClearFiber Powder (SunFiber®) delivers 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 Promise. Every benefit below is supported by human clinical studies indexed in NIH/PubMed, with full texts in NIH/PMC when available. We also reference reviews from leading health organizations and insights from top universities to keep guidance aligned with credible science.*
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; NIH/PubMed — Setayesh L., 2023)
- 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. (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
University / Academic Context
Global Evidence & Authoritative Reviews
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Cochrane-indexed analyses and NIH-indexed reviews support soluble fiber for digestive outcomes and cardiometabolic markers. (NIH/PubMed — Lin J., 2021)
We monitor research from leading institutions — Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, Tufts, the University of Florida, Oregon State University – Linus Pauling Institute, Columbia, Cornell, and Ohio State — to keep our guidance aligned with credible science.*
Key Ingredients
- SunFiber® (Partially Hydrolyzed Guar Gum) — prebiotic soluble fiber that supports regularity & microbiome balance. (NIH/PMC — Yasukawa Z., 2019)
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*
3rd-Party Testing. Every LifeSource Vitamins product is tested by independent labs to verify identity, purity, potency, and label accuracy. Learn more here.
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 health; also helps healthy LDL and post-meal glucose. 3 g fiber, powder. Clinically Studied Ingredients — NIH/PubMed!*
