Best L-Arginine products by transparent scoring (2026)
Single-ingredient products scored by public rules: dose fit, label transparency, data verification, company transparency, third-party testing. Not a measure of efficacy or safety. No paid placement.
Products ranked: 93 · Reference range: 312 – 8,000 mg (source) · Updated 2026-11-01
Reference range: derived from the cited reference values; see the methodology.
Single-ingredient products only.
Left out of this list: combination products (a single-ingredient list exists) (41)
Dose fit 40 · Label transparency 20 · Data verification 15 · Company transparency 15 · Third-party test 10 (No data (not scored); the other four parts are rescaled from 90 to 100) — Methodology · L-Arginine →
| Rank | Product | Per day | Score | Breakdown | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 tie |
L-Arginine Twinlab · US NIH DSLD |
500 mg | 100.0 | Breakdown
|
||||||||||||||||
| 1 tie |
L-Arginine 500 mg Spring Valley · US NIH DSLD |
3,000 mg | 100.0 | Breakdown
|
||||||||||||||||
| 1 tie |
L-Arginine 500 mg Swanson · US NIH DSLD |
1,000 mg | 100.0 | Breakdown
|
||||||||||||||||
| 4 tie |
L-Arginine 1000 mg Nature's Bounty · US NIH DSLD |
1,000 mg | 97.8 | Breakdown
|
||||||||||||||||
| 4 tie |
L-Arginine 500 mg Vitamin World · US NIH DSLD |
500 mg | 97.8 | Breakdown
|
||||||||||||||||
| 4 tie |
Maximum Strength L-Arginine 1000 mg Vitamin World · US NIH DSLD |
6,000 mg | 97.8 | Breakdown
|
||||||||||||||||
| 7 tie |
L-Arginine Thorne · US NIH DSLD |
2,000 mg | 94.4 | Breakdown
|
||||||||||||||||
| 7 tie |
L-Arginine Allergy Research Group · US NIH DSLD |
1,500 mg | 94.4 | Breakdown
|
||||||||||||||||
| 7 tie |
L-Arginine 1000 mg Puritan's Pride · US NIH DSLD |
6,000 mg | 94.4 | Breakdown
|
||||||||||||||||
| 7 tie |
L-Arginine 500 mg Sundown Naturals · US NIH DSLD |
3,000 mg | 94.4 | Breakdown
|
||||||||||||||||
| 7 tie |
L-Arginine Powder Carlson · US NIH DSLD |
3,000 mg | 94.4 | Breakdown
|
||||||||||||||||
| 12 tie |
ARGININE POWDER Empire Health Distribution Inc. · Health Canada LNHPD |
800 mg | 93.3 | Breakdown
|
||||||||||||||||
| 12 tie |
Arginine Healthy Body Services Inc. · Health Canada LNHPD |
5,000 mg | 93.3 | Breakdown
|
||||||||||||||||
| 12 tie |
L-Arginine 500 mg Capsules GFR Pharma Ltd. · Health Canada LNHPD |
500 mg | 93.3 | Breakdown
|
||||||||||||||||
| 12 tie |
LABRADA A2 Pump Empire Health Distribution Inc. · Health Canada LNHPD |
1,500 mg | 93.3 | Breakdown
|
||||||||||||||||
| 16 tie |
L-Arginine 1000 mg 21st Century · US NIH DSLD |
1,000 mg | 92.2 | Breakdown
|
||||||||||||||||
| 16 tie |
L-Arginine 1000 mg Bluebonnet · US NIH DSLD |
1,000 mg | 92.2 | Breakdown
|
||||||||||||||||
| 16 tie |
L-Arginine 1000 mg Solgar · US NIH DSLD |
3,000 mg | 92.2 | Breakdown
|
||||||||||||||||
| 16 tie |
L-Arginine 500 mg Bluebonnet · US NIH DSLD |
500 mg | 92.2 | Breakdown
|
||||||||||||||||
| 16 tie |
L-Arginine 500 mg Solgar · US NIH DSLD |
3,000 mg | 92.2 | Breakdown
|
||||||||||||||||
| 16 tie |
L-Arginine 675 mg Carlson · US NIH DSLD |
2,700 mg | 92.2 | Breakdown
|
||||||||||||||||
| 22 tie |
100% Pure L-Arginine NutraBio · US NIH DSLD |
4,500 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
Arginine AKG 3 g Unflavored Nutricost · US NIH DSLD |
3,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine Dr. Mercola · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine New Sun · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine Pure · US NIH DSLD |
2,120 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine NutriCology · US NIH DSLD |
1,500 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine Purus Labs · US NIH DSLD |
4,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine Herbadiet · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 1,000 mg AN Amazing Nutrition Amazing Formulas · US NIH DSLD |
3,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 1,000 mg Source Naturals · US NIH DSLD |
3,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 1,000 mg LuckyVitamin · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 1000 mg Amazing Muscle · US NIH DSLD |
3,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 1000 mg Protocol For Life Balance · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 1000 mg Capsules BulkSupplements.com · US NIH DSLD |
3,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 3 Grams GNC Beyond Raw Chemistry Labs · US NIH DSLD |
3,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 350 mg Endurance Products Company · US NIH DSLD |
2,100 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 5 g Nutricost · US NIH DSLD |
5,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 5 g Unflavored Nutricost · US NIH DSLD |
5,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 500 mg NOW · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 500 mg Amazing Muscle · US NIH DSLD |
1,500 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 500 mg AN Amazing Nutrition Amazing Formulas · US NIH DSLD |
1,500 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 500 mg Physician's Preference · US NIH DSLD |
3,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 500 mg H-E-B · US NIH DSLD |
3,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 500 mg Protocol For Life Balance · US NIH DSLD |
3,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 500 mg Sundown Naturalist · US NIH DSLD |
3,000 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 500 mg Nutricost · US NIH DSLD |
500 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 500 mg Bronson · US NIH DSLD |
500 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 500 mg California Gold Nutrition · US NIH DSLD |
500 mg | 83.3 | Breakdown
|
||||||||||||||||
| 22 tie |
L-Arginine 700 mg NOW · US NIH DSLD |
700 mg | 83.3 | Breakdown
|
||||||||||||||||
93 products were scored; the top 50 are listed here. See the rest in the product list.
For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.