Doctor's Best Prebiotic Powder, Sunfiber®, Unflavored, 7.4 oz (210 g) supplement bottle
Doctor's Best

Prebiotic Powder, Sunfiber®, Unflavored, 7.4 oz (210 g)

What We Researched
6 active ingredients analyzed · 1 brand certification checked · 2 retailers compared · Last updated: Mar 2026
100
Product Score Excellent
61
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Sunfiber® Guar Fiber 7 g
Bioavailability Excellent

Absorption Rating

  • Sunfiber® Guar Fiber Good
Other Ingredients Excellent

Fillers & Additives

No inactive ingredient data available.

Efficacy Excellent

Dosage Analysis

  • Sunfiber® Guar Fiber 7 g Effective

Supplement Facts

Ingredient Amount % Daily Value
Calories 15
Total Carbohydrate 7 g 3% **
Dietary Fiber 6 g 21% **
Soluble Fiber 6 g
Total Sugars 0 g
Sunfiber® Guar Fiber 7 g

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$22$21$20$19$18 Mar 12 $19.99$19.99
iHerb
Vitacost

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Doctor's Best

Founded 1990 · Tustin, California, USA · 186 products · doctorsbest.com

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source

Violation History

1 incident
Recall Red Yeast Rice2014-06-26Source
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Frequently Asked Questions
Is Doctor's Best Prebiotic Powder, Sunfiber® a good supplement?

Doctor's Best Prebiotic Powder, Sunfiber®, Unflavored, 7.4 oz (210 g) received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 6 active ingredients with 30 servings per container. The manufacturer, Doctor's Best, holds a brand trust score of 61/100 with 1 verified certifications including Fda Gmp Inspections.

What are the ingredients in Doctor's Best Prebiotic Powder, Sunfiber®?

Doctor's Best Prebiotic Powder, Sunfiber® contains 6 active ingredients: Calories (15), Total Carbohydrate (7 g), Dietary Fiber (6 g), Soluble Fiber (6 g), Total Sugars (0 g), Sunfiber® Guar Fiber (7 g). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Doctor's Best Prebiotic Powder, Sunfiber® safe to take?

Doctor's Best Prebiotic Powder, Sunfiber®, Unflavored, 7.4 oz (210 g) has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Doctor's Best a trustworthy supplement brand?

Doctor's Best receives a brand trust score of 61/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1990 and headquartered in Tustin, California, USA, the company offers 186 products in their lineup. They hold 1 verified certifications including Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Doctor's Best has 1 historical regulatory incident on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.