Metamucil 4-In-1 Fiber, Berry, 23.3 oz (660 g) supplement bottle
Metamucil

4-In-1 Fiber, Berry, 23.3 oz (660 g)

What We Researched
7 active ingredients analyzed · 9 inactive ingredients decoded · 1 brand certification checked · 2 retailers compared · Last updated: Mar 2026
43
Product Score Poor

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Iron 0.7 mg 4%
Potassium 70 mg 1%
Bioavailability Very Good

Absorption Rating

  • Iron Fair
  • Potassium Good
Other Ingredients Poor

Fillers & Additives

  • Psyllium Husk
  • Maltodextrin
  • Artificial Flavor
  • Citric Acid
  • Malic Acid
  • Acesulfame Potassium
  • Aspartame
  • Red 40 High
  • Blue 1 High
Efficacy Very Poor

Dosage Analysis

  • Iron 0.7 mg Under-dosed
  • Potassium 70 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calories 30
Total Carbohydrate 10 g 4%*
Dietary Fiber 6 g 21%
Soluble Fiber 5 g †
Iron 0.7 mg 4%
Sodium 10 mg <1%
Potassium 70 mg 1%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Psyllium Husk Generally_safe

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

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Artificial Flavor Generally_safe

It is used to enhance the taste of supplements.

Citric Acid Safe

Adds tartness and acts as a natural preservative. Also aids in ingredient stability.

Malic Acid Safe

Adds tartness and enhances fruit flavors in gummies and chewables.

Acesulfame Potassium Generally_safe

It is used to provide sweetness without adding calories.

Aspartame Unknown
Red 40 Avoid

Adds red color to supplements.

Blue 1 Caution

Adds blue color to supplements.

Price Comparison

iHerb $40.49 $0.71 / serving
Best Price

Price History

Tracked across major retailers. Updated periodically.

$42$41$40$39$38 Mar 12 $40.49
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, Berry a good supplement?

Metamucil 4-In-1 Fiber, Berry, 23.3 oz (660 g) received a product quality score of 43/100 in GoodSupp's independent analysis, indicating several areas of concern that consumers should review. The product contains 7 active ingredients with 57 servings per container. Of the 9 inactive ingredients, 2 are rated safe and 1 are flagged for review.

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

Metamucil 4-In-1 Fiber, Berry contains 7 active ingredients: Calories (30), Total Carbohydrate (10 g), Dietary Fiber (6 g), Soluble Fiber (5 g), Iron (0.7 mg), Sodium (10 mg), and 1 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Metamucil 4-In-1 Fiber, Berry safe to take?

Metamucil 4-In-1 Fiber, Berry, 23.3 oz (660 g) has been analyzed for ingredient safety across all its components. Of 9 inactive ingredients, 2 are rated safe. 1 ingredient is flagged for review: Blue 1. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. 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.