L-Arginine, 1,000 mg, 100 Tablets
Product Analysis
Transparency Excellent
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| L-Arginine (from L-Arginine Hydrochloride) | 1,000 mg | ** |
Bioavailability Excellent
Absorption Rating
- L-Arginine (from L-Arginine Hydrochloride) Good
Other Ingredients Very Poor
Fillers & Additives
- Cellulose
- Croscarmellose Sodium
- Stearic Acid
- Magnesium Stearate
- PEG Medium
- Pharmaceutical Glaze
- Polyvinyl Alcohol
- Silicon Dioxide
- Talc High
- Titanium Dioxide High
Efficacy Very Poor
Dosage Analysis
- L-Arginine (from L-Arginine Hydrochloride) 1,000 mg Under-dosed
Supplement Facts
| Ingredient | Amount | % Daily Value |
|---|---|---|
| L-Arginine (from L-Arginine Hydrochloride) | 1,000 mg | ** |
Other Ingredients
Cellulose Safe
Stearic Acid Safe
Magnesium Stearate Safe
PEG Caution
Pharmaceutical Glaze Generally_safe
Polyvinyl Alcohol Generally_safe
Silicon Dioxide Safe
Talc Avoid
Titanium Dioxide Caution
Price Comparison
Price History
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Is 21st Century L-Arginine, 1 a good supplement?
21st Century L-Arginine, 1,000 mg, 100 Tablets received a product quality score of 50/100 in GoodSupp's independent analysis, indicating several areas of concern that consumers should review. The product contains 1 active ingredients Of the 10 inactive ingredients, 5 are rated safe and 2 are flagged for review. The manufacturer, 21st Century, holds a brand trust score of 76/100 with 2 verified certifications including Consumerlab, Nsf Gmp.
What are the ingredients in 21st Century L-Arginine, 1?
21st Century L-Arginine, 1 contains 1 active ingredients: L-Arginine (from L-Arginine Hydrochloride) (1,000 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.
Is 21st Century L-Arginine, 1 safe to take?
21st Century L-Arginine, 1,000 mg, 100 Tablets has been analyzed for ingredient safety across all its components. Of 10 inactive ingredients, 5 are rated safe. 2 ingredients are flagged for review: PEG, Titanium Dioxide. '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.
Is 21st Century a trustworthy supplement brand?
21st Century receives a brand trust score of 76/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1991 and headquartered in Tempe, Arizona, United States, the company offers 231 products in their lineup. They hold 2 verified certifications including Consumerlab, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: 21st Century has 4 historical regulatory incidents on record, which are factored into the trust score.
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