Metamucil 4-in-1 Fiber, Unflavored, 28.1 oz (798 g) supplement bottle
Metamucil

4-in-1 Fiber, Unflavored, 28.1 oz (798 g)

What We Researched
9 active ingredients analyzed · 2 inactive ingredients decoded · 1 brand certification checked · 1 retailer compared · Last updated: Mar 2026
68
Product Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Iron 0.7 mg 4%
Potassium 60 mg 1%
Bioavailability Very Good

Absorption Rating

  • Iron Fair
  • Potassium Good
Other Ingredients Excellent

Fillers & Additives

  • Sugar
  • Psyllium Husk
Efficacy Very Poor

Dosage Analysis

  • Iron 0.7 mg Under-dosed
  • Potassium 60 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calories 40
Total Carbohydrate 13 g 5%
Dietary Fiber 6 g 21%*
Soluble Fiber 5 g †
Total Sugars 7 g
Incl. Added Sugars 7 g 14%
Iron 0.7 mg 4%
Sodium 10 mg <1%
Potassium 60 mg 1%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Sugar Generally_safe

Adds sweetness to chewable or gummy supplements.

Psyllium Husk Generally_safe

It is used as a source of fiber or as a bulking agent.

Price Comparison

iHerb $40.90 $0.72 / serving
Best Price

Price History

Tracked across major retailers. Updated periodically.

$43$42$41$40$39 Mar 12 $40.90
iHerb

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

Brand Trust Report
Metamucil

Founded 1934 · Cincinnati, Ohio, USA · 16 products · metamucil.com/

Certifications

1 certification
Consumerlab Verified Source

Transparency

1 claim

Violation History

4 incidents
Recall Metamucil Capsule products (specifics not fully detailed in the notice)2024-02-01Source
Prop 65 Lead2023-08-02Source
Lawsuit Products contain dangerous levels of lead and are falsely advertised as safe and healthy.2023Source
Lawsuit Products with added sugar are falsely marketed with health benefits related to blood sugar, appetite control, and digestive health.2022Source
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Frequently Asked Questions
Is Metamucil 4-in-1 Fiber, Unflavored a good supplement?

Metamucil 4-in-1 Fiber, Unflavored, 28.1 oz (798 g) received a product quality score of 68/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 9 active ingredients with 57 servings per container. Of the 2 inactive ingredients, 0 are rated safe and 0 are flagged for review.

What are the ingredients in Metamucil 4-in-1 Fiber, Unflavored?

Metamucil 4-in-1 Fiber, Unflavored contains 9 active ingredients: Calories (40), Total Carbohydrate (13 g), Dietary Fiber (6 g), Soluble Fiber (5 g), Total Sugars (7 g), Incl. Added Sugars (7 g), and 3 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Metamucil 4-in-1 Fiber, Unflavored safe to take?

Metamucil 4-in-1 Fiber, Unflavored, 28.1 oz (798 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.

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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.