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Swanson Timed-Release C-500 supplement bottle
Swanson

Timed-Release C-500 Review

What We Researched
2 active ingredients analyzed · 4 inactive ingredients decoded · 6 brand certifications checked · Page generated: Sep 2026
75
Product Score Fair
97
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as ascorbic acid and from timed-release beadlets) 500 mg 556%
Rose Hips (from concentrate, Rosa canina) (fruit) 50 mg *
Bioavailability Fair

Absorption Rating

  • Vitamin C (as ascorbic acid and from timed-release beadlets) Fair
  • Rose Hips (from concentrate, Rosa canina) (fruit) Fair
Other Ingredients Excellent

Fillers & Additives

  • Stearic Acid
  • Xanthan Gum
  • Magnesium Stearate
  • Pharmaceutical Glaze
Efficacy Fair

Dosage Analysis

  • Vitamin C (as ascorbic acid and from timed-release beadlets) 500 mg Effective
  • Rose Hips (from concentrate, Rosa canina) (fruit) 50 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as ascorbic acid and from timed-release beadlets) 500 mg 556%
Rose Hips (from concentrate, Rosa canina) (fruit) 50 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Xanthan Gum Safe

Thickens and stabilizes liquid and semi-solid supplements.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Pharmaceutical Glaze Generally_safe

It is used to coat tablets or capsules for easier swallowing or controlled release.

Brand Trust Report
Swanson

Founded 1969 · Fargo, North Dakota, United States · 1329 products · swansonvitamins.com

Certifications

6 certifications
Nsf Gmp Source available Primary evidence
Fda Gmp Inspections Source available Primary evidence
Npa Gmp Source available Primary evidence
Usda Organic Source available Primary evidence
Vegan Certified Source available Primary evidence
NSF Certified Supporting evidence unavailable

Transparency

5 claims
Third Party Testing Claim — Verified Evidence available Evidence
Coa Availability — Claimed Evidence available Evidence
In House Testing — Verified Evidence available Evidence
Testing Lab Disclosure — True Brand claim; evidence unavailable
Contains Proprietary Blend — True Brand claim; evidence unavailable

Violation History

5 incidents
Recall Vitamin B12 Methylcobalamin High Absorption2022-03-04 Source available Primary source
Prop 65 Lead2015-11-03 Source available Primary source
Recall Swanson Premium Brand Full Spectrum Cilantro (Coriander)2014-04-04 Source available Primary source
Recall Swanson Organic Celery Seed (Whole)2011-12-16 Source available Primary source
Fda Warning Products contained an unauthorized drug (lovastatin) and were marketed with claims to treat high cholesterol, rendering them unapproved new drugs.2007-08-08 Source available Primary source
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Frequently Asked Questions
Is Swanson Timed-Release C-500 a good supplement?

Swanson Timed-Release C-500 received a product quality score of 75/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 2 active ingredients All 4 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Swanson, holds a brand trust score of 97/100.

What are the ingredients in Swanson Timed-Release C-500?

Swanson Timed-Release C-500 contains 2 active ingredients: Vitamin C (as ascorbic acid and from timed-release beadlets) (500 mg), Rose Hips (from concentrate, Rosa canina) (fruit) (50 mg). Notable high-dose ingredients include Vitamin C at 556% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Swanson Timed-Release C-500 safe to take?

GoodSupp reviewed the inactive-ingredient data available for Swanson Timed-Release C-500. All 4 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Swanson a trustworthy supplement brand?

Swanson receives a brand trust score of 97/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1969 and headquartered in Fargo, North Dakota, United States, the company offers 1329 products in their lineup. Note: Swanson has 5 historical regulatory incidents 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 — read our methodology. 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.