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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: 134 · Reference range: 312 – 8,000 mg (source) · Updated 2026-10-30
Dose fit 40 · Label transparency 20 · Data verification 15 · Company transparency 15 · Third-party test 10 — Methodology · L-Arginine →
| Rank | Product | Per day | Score | Breakdown | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 tie |
L-Arginine Twinlab · US NIH DSLD |
500 mg | 90.0 | Breakdown
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| 1 tie |
L-Arginine NutraChamps · US NIH DSLD |
500 mg | 90.0 | Breakdown
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| 1 tie |
L-Arginine 500 mg Spring Valley · US NIH DSLD |
3,000 mg | 90.0 | Breakdown
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| 1 tie |
L-Arginine 500 mg Swanson · US NIH DSLD |
1,000 mg | 90.0 | Breakdown
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| 5 tie |
L-Arginine & L-Citrulline GNC · US NIH DSLD |
500 mg | 88.0 | Breakdown
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| 5 tie |
L-Arginine & L-Ornithine Swanson · US NIH DSLD |
1,500 mg | 88.0 | Breakdown
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| 5 tie |
L-Arginine 1000 mg Nature's Bounty · US NIH DSLD |
1,000 mg | 88.0 | Breakdown
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| 5 tie |
L-Arginine 500 mg Vitamin World · US NIH DSLD |
500 mg | 88.0 | Breakdown
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| 5 tie |
L-Arginine 500 mg The Vitamin Shoppe · US NIH DSLD |
500 mg | 88.0 | Breakdown
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| 5 tie |
Maximum Strength L-Arginine 1000 mg Vitamin World · US NIH DSLD |
6,000 mg | 88.0 | Breakdown
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| 11 tie |
L-Arginine Thorne · US NIH DSLD |
2,000 mg | 85.0 | Breakdown
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| 11 tie |
L-Arginine Allergy Research Group · US NIH DSLD |
1,500 mg | 85.0 | Breakdown
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| 11 tie |
L-Arginine 1000 mg Puritan's Pride · US NIH DSLD |
6,000 mg | 85.0 | Breakdown
|
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| 11 tie |
L-Arginine 500 mg Sundown Naturals · US NIH DSLD |
3,000 mg | 85.0 | Breakdown
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| 11 tie |
L-Arginine Powder Carlson · US NIH DSLD |
3,000 mg | 85.0 | Breakdown
|
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| 11 tie |
Sustained plus Immediate Release L-Arginine 500 mg Doctor's Best · US NIH DSLD |
1,000 mg | 85.0 | Breakdown
|
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| 17 tie |
ARGININE POWDER Empire Health Distribution Inc. · Health Canada LNHPD |
800 mg | 84.0 | Breakdown
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| 17 tie |
Arginine Healthy Body Services Inc. · Health Canada LNHPD |
5,000 mg | 84.0 | Breakdown
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| 17 tie |
GNC L-Arginine & L-Citrulline Caplet GNC · Malaysia NPRA |
614 mg | 84.0 | Breakdown
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| 17 tie |
L-Arginine 500 mg Capsules GFR Pharma Ltd. · Health Canada LNHPD |
500 mg | 84.0 | Breakdown
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| 17 tie |
LABRADA A2 Pump Empire Health Distribution Inc. · Health Canada LNHPD |
1,500 mg | 84.0 | Breakdown
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| 17 tie |
NutraChamps L-Arginine Capsules NutraChamps Inc. · Health Canada LNHPD |
374 mg | 84.0 | Breakdown
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| 23 tie |
L-Arginine 1000 mg 21st Century · US NIH DSLD |
1,000 mg | 83.0 | Breakdown
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| 23 tie |
L-Arginine 1000 mg Bluebonnet · US NIH DSLD |
1,000 mg | 83.0 | Breakdown
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| 23 tie |
L-Arginine 1000 mg Solgar · US NIH DSLD |
3,000 mg | 83.0 | Breakdown
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| 23 tie |
L-Arginine 500 mg Bluebonnet · US NIH DSLD |
500 mg | 83.0 | Breakdown
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| 23 tie |
L-Arginine 500 mg Solgar · US NIH DSLD |
3,000 mg | 83.0 | Breakdown
|
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| 23 tie |
L-Arginine 500 mg L-Ornithine 250 mg Bluebonnet · US NIH DSLD |
500 mg | 83.0 | Breakdown
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| 23 tie |
L-Arginine 675 mg Carlson · US NIH DSLD |
2,700 mg | 83.0 | Breakdown
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| 23 tie |
L-Arginine Caps 500 mg Country Life · US NIH DSLD |
1,500 mg | 83.0 | Breakdown
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| 23 tie |
L-Arginine L-Ornithine 500 mg/250 mg Solgar · US NIH DSLD |
1,000 mg | 83.0 | Breakdown
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| 23 tie |
L-Arginine L-Ornithine Hydrochloride Caps Country Life · US NIH DSLD |
625 mg | 83.0 | Breakdown
|
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| 33 | 21ST CENTURY L-ARGININE 500MG PLUS 21st Century · Malaysia NPRA |
500 mg | 79.0 | Breakdown
|
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| 34 tie |
100% Pure L-Arginine NutraBio · US NIH DSLD |
4,500 mg | 75.0 | Breakdown
|
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| 34 tie |
AAKG (L-Arginine Alpha-Ketoglutarate) BulkSupplements.com · US NIH DSLD |
5,283 mg | 75.0 | Breakdown
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| 34 tie |
Arginine AKG 3 g Unflavored Nutricost · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
Beet Root + L-Arginine Futurebiotics · US NIH DSLD |
1,000 mg | 75.0 | Breakdown
|
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| 34 tie |
L-Arginine Havasu Nutrition · US NIH DSLD |
400 mg | 75.0 | Breakdown
|
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| 34 tie |
L-Arginine Millecor · US NIH DSLD |
400 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Envy Nutrition · US NIH DSLD |
400 mg | 75.0 | Breakdown
|
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| 34 tie |
L-Arginine Dr. Mercola · US NIH DSLD |
2,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine New Sun · US NIH DSLD |
2,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Pure · US NIH DSLD |
2,120 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Orphic Nutrition · US NIH DSLD |
400 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine NutriCology · US NIH DSLD |
1,500 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Purus Labs · US NIH DSLD |
4,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Herbadiet · US NIH DSLD |
2,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 1,000 mg AN Amazing Nutrition Amazing Formulas · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 1,000 mg Source Naturals · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 1,000 mg LuckyVitamin · US NIH DSLD |
2,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 1000 mg Amazing Muscle · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 1000 mg Protocol For Life Balance · US NIH DSLD |
2,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 1000 mg Capsules BulkSupplements.com · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 3 Grams GNC Beyond Raw Chemistry Labs · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 350 mg Endurance Products Company · US NIH DSLD |
2,100 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 5 g Nutricost · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 5 g Unflavored Nutricost · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 500 mg Viva Vitamins · US NIH DSLD |
1,500 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 500 mg NOW · US NIH DSLD |
2,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 500 mg Amazing Muscle · US NIH DSLD |
1,500 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 500 mg AN Amazing Nutrition Amazing Formulas · US NIH DSLD |
1,500 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 500 mg Physician's Preference · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 500 mg H-E-B · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 500 mg Protocol For Life Balance · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 500 mg Sundown Naturalist · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 500 mg Nutricost · US NIH DSLD |
500 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 500 mg Bronson · US NIH DSLD |
500 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 500 mg California Gold Nutrition · US NIH DSLD |
500 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 700 mg NOW · US NIH DSLD |
700 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine 750 mg NuMedica · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
|
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| 34 tie |
L-Arginine Alpha-Ketoglutarate BulkSupplements.com · US NIH DSLD |
5,283 mg | 75.0 | Breakdown
|
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| 34 tie |
L-Arginine Capsules New Age · US NIH DSLD |
400 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Capsules 5000mg BulkSupplements.com · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Double Strength 1000 mg Nova Nutritions · US NIH DSLD |
1,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Extra Strength Havasu Nutrition · US NIH DSLD |
400 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Extra Strength 2662 mg Built By Nature · US NIH DSLD |
800 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine L-Citrulline 1000 mg Amazing Muscle · US NIH DSLD |
750 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine L-Citrulline 1000 mg Nova Nutritions · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
|
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| 34 tie |
L-Arginine L-Citrulline Complex Source Naturals · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
|
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| 34 tie |
L-Arginine L-Citrulline Complex 1000 mg BIOVEA · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Powder NOW Sports · US NIH DSLD |
6,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Premium Natural Goal · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine Unflavored Amazing Muscle · US NIH DSLD |
4,600 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine-HCL PureBulk.com · US NIH DSLD |
1,245 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine-HCL (Vegan) PureBulk.com · US NIH DSLD |
1,245 mg | 75.0 | Breakdown
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| 34 tie |
L-Arginine/L-Citrulline Complex 1000 mg AN Amazing Nutrition Amazing Formulas · US NIH DSLD |
750 mg | 75.0 | Breakdown
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| 34 tie |
Maximum Strength L-Arginine HCl 1,000 mg Nature's Truth · US NIH DSLD |
4,000 mg | 75.0 | Breakdown
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| 34 tie |
Mega Strength L-Arginine 500 mg Nature's Truth · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 34 tie |
N.O. Rush L-Arginine Natures Craft · US NIH DSLD |
400 mg | 75.0 | Breakdown
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| 34 tie |
Vein Erect with L-Arginine & Maca Mason Natural · US NIH DSLD |
2,500 mg | 75.0 | Breakdown
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| 91 tie |
Double Strength L-Arginine 1000 mg NOW · US NIH DSLD |
2,000 mg | 73.0 | Breakdown
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| 91 tie |
L-Arginine GNC Mega Men · US NIH DSLD |
1,000 mg | 73.0 | Breakdown
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| 91 tie |
L-Arginine & L-Citrulline GNC Mega Men · US NIH DSLD |
500 mg | 73.0 | Breakdown
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| 91 tie |
L-Arginine 1000 mg Natural Factors · US NIH DSLD |
1,000 mg | 73.0 | Breakdown
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| 91 tie |
L-Arginine 1000 mg Good 'N Natural · US NIH DSLD |
1,000 mg | 73.0 | Breakdown
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| 91 tie |
L-Arginine 500 mg Vitabase · US NIH DSLD |
3,000 mg | 73.0 | Breakdown
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| 91 tie |
L-Arginine 500 mg SimplySupplements · US NIH DSLD |
605 mg | 73.0 | Breakdown
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| 91 tie |
L-Arginine 500 mg Indiana Botanic Gardens · US NIH DSLD |
1,500 mg | 73.0 | Breakdown
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| 91 tie |
L-Arginine 500 mg Puritan's Pride Premium · US NIH DSLD |
3,000 mg | 73.0 | Breakdown
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| 91 tie |
L-Arginine 500 mg Major · US NIH DSLD |
3,000 mg | 73.0 | Breakdown
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For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.