FiberMend®
Scored by the Formulate Research Team · Last reviewed July 2026
Overview: Thorne FiberMend®
Get a healthy dose of prebiotic fiber for GI wellness and to grow good bacteria in your gut* Keep your gut healthy and in balance with FiberMend, a soluble prebiotic fiber that helps maintain healthy blood sugar levels, promotes regularity, and supports optimal digestive function.*
Score Breakdown
Formulate scores every product across six weighted dimensions. Each dimension is graded independently — hover or tap to see what drove each component.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| Rice Bran3 systematic reviews · 24 randomised trials | 2.5 g |
| Green Tea Phytosome FTT68 systematic reviews · 176 randomised trials | 50 mg |
| PectinApple11 systematic reviews · 53 randomised trials | 150 mg |
| ArabinogalactanLarch1 systematic review · 6 randomised trials | 300 mg |
| Partially Hydrolyzed Guar Gum1 systematic review · 13 randomised trials | 8 g |
Certifications & Testing
Recommended Use
Mix 1 scoop with at least 8-10 ounces of water, juice, or preferred beverage daily or as recommended by your health-care practitioner.
Warnings
ALLERGY WARNING This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients. PREGNANCY If pregnant, consult your health-care practitioner before using this product. INTERACTIONS There are no known adverse interactions or contraindications at publication date.
Frequently Asked Questions
What is Thorne FiberMend®'s Formulate score?
Thorne FiberMend® scores 77 out of 100 (grade B+) on Formulate's ingredient-level rubric, which weighs evidence quality, dose accuracy, bioavailability, transparency, safety, and manufacturing practices.
Is Thorne FiberMend® worth it?
Thorne FiberMend® scores 77/100 (grade B+). That's an above-average result — most of its doses and ingredient forms are well-chosen, with only minor gaps in dosing, transparency, or testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Thorne FiberMend®?
Each serving contains Rice Bran (2.5 g), Green Tea Phytosome FTT (50 mg), Pectin (150 mg), Arabinogalactan (300 mg), and more. Serving size: 1 Scoop. 30 servings per container.
How do I take fibermend®?
Mix 1 scoop with at least 8-10 ounces of water, juice, or preferred beverage daily or as recommended by your health-care practitioner.
Who makes FiberMend®?
FiberMend® is made by Thorne. See Formulate's full grade and product lineup for Thorne on its brand page.
Is Thorne FiberMend® third-party tested?
Thorne lists the following certifications and testing for this product: Gluten Free, Soy Free, Dairy Free, Third-Party Tested, Natural Flavors, Natural Colors, Made in USA, GMP Certified.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.