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
Three factors carry this score; three more are checked separately and can only take points away. Hover or tap to see what drove each one.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| Rice Bran3 systematic reviews · 24 randomised trials | 2.5 g |
| ArabinogalactanLarch1 systematic review · 6 randomised trials | 300 mg |
| Green Tea Phytosome FTT68 systematic reviews · 176 randomised trials | 50 mg |
| Soluble Fiber | 6 g |
| PectinApple11 systematic reviews · 53 randomised trials | 150 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: clinical evidence, dose accuracy and bioavailability carry the score, while manufacturing, transparency and safety are checked separately and can only deduct.
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), Arabinogalactan (300 mg), Green Tea Phytosome FTT (50 mg), Soluble Fiber (6 g), and more. Serving size: One Scoop (11 g). 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, Derived From Natural Flavors, Derived From Natural Colors, Made in USA, GMP.
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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.