Swanson L-Arginine, Sustained Release, 1,000 mg, 90 Tablets supplement bottle
Swanson

L-Arginine, Sustained Release, 1,000 mg, 90 Tablets

What We Researched
1 active ingredient analyzed · 6 inactive ingredients decoded · 6 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
75
Product Score Fair
90
Brand Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
AjiPure® Pharmaceutical Grade L-Arginine (from L-Arginine HCl) 1 g *
Bioavailability Excellent

Absorption Rating

  • AjiPure® Pharmaceutical Grade L-Arginine (from L-Arginine HCl) Good
Other Ingredients Excellent

Fillers & Additives

  • Hydroxypropyl Cellulose
  • Stearic Acid
  • Xanthan Gum
  • Pharmaceutical Glaze
  • Magnesium Stearate
  • Silica
Efficacy Very Poor

Dosage Analysis

  • AjiPure® Pharmaceutical Grade L-Arginine (from L-Arginine HCl) 1 g Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
AjiPure® Pharmaceutical Grade L-Arginine (from L-Arginine HCl) 1 g *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hydroxypropyl Cellulose Safe

Binds tablet ingredients and can form tablet coatings.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Xanthan Gum Safe

Thickens and stabilizes liquid and semi-solid supplements.

Pharmaceutical Glaze Generally_safe

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

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Price Comparison

iHerb $25.87
Best Price

Price History

Tracked across major retailers. Updated periodically.

$27$26$25$24$23 Mar 12 $25.00
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
Swanson

Founded 1969 · Fargo, North Dakota, United States · 994 products · swansonvitamins.com

Certifications

6 certifications
Consumerlab Verified
Nsf Gmp Verified Source
Fda Gmp Inspections Verified Source
Npa Gmp Verified Source
Usda Organic Verified Source
Vegan Certified Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Coa Availability — Claimed Source
In House Testing — Verified Source

Violation History

6 incidents
Recall Vitamin B12 Methylcobalamin High Absorption2022-03-04Source
Lawsuit Website not accessible to blind individuals, violating the Americans with Disabilities Act (ADA).2019Source
Prop 65 Lead2015-11-03Source
Recall Swanson Premium Brand Full Spectrum Cilantro (Coriander)2014-04-04Source
Recall Swanson Organic Celery Seed (Whole)2011-12-16Source
Fda Warning Products contained an unauthorized drug (lovastatin) and were marketed with claims to treat high cholesterol, rendering them unapproved new drugs.2007-08-08Source
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Frequently Asked Questions
Is Swanson L-Arginine, Sustained Release a good supplement?

Swanson L-Arginine, Sustained Release, 1,000 mg, 90 Tablets received a product quality score of 75/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 1 active ingredients Of the 6 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, Swanson, holds a brand trust score of 90/100 with 6 verified certifications including Consumerlab, Nsf Gmp, Fda Gmp Inspections, Npa Gmp.

What are the ingredients in Swanson L-Arginine, Sustained Release?

Swanson L-Arginine, Sustained Release contains 1 active ingredients: AjiPure® Pharmaceutical Grade L-Arginine (from L-Arginine HCl) (1 g). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Swanson L-Arginine, Sustained Release safe to take?

Swanson L-Arginine, Sustained Release, 1,000 mg, 90 Tablets 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 Swanson a trustworthy supplement brand?

Swanson receives a brand trust score of 90/100 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 994 products in their lineup. They hold 6 verified certifications including Consumerlab, Nsf Gmp, Fda Gmp Inspections, Npa Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Swanson has 6 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. 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.