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L-Arginine & L-Ornithine

Swanson
4.8
★ ★ ★ ★ ★
(493 ratings)
Arginine 500 mg
Product Image
Score76
Arginine and ornithine make sense together, but both amounts are light. Convenience and low cost are stronger than dose depth.
How scoring works
Quantity:100 Capsule(s) • (100 servings)
Goals:

Score 76

Arginine and ornithine make sense together, but both amounts are light. Convenience and low cost are stronger than dose depth.
How scoring works
$12.29($0.12 per serving)
iHerb
$ 16.39
iHerb
$ 12.29
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Analysis

The formula pairs 500 mg of L-arginine with 250 mg of L-ornithine hydrochloride, creating a coherent amino-acid combination at modest amounts. L-arginine is a nitric-oxide precursor, so it may support blood-vessel relaxation and circulation without acting as a stimulant.

A single capsule is convenient, but neither active reaches the depth commonly sought for circulation or fitness-focused use. Low serving cost makes the product accessible for light use, while reaching a substantial arginine intake would require several capsules.

The formula fits adults who want focused arginine support and can adjust intake to the stated serving size. L-arginine may add to the blood-pressure-lowering effects of nitrates or antihypertensive medicines, increasing the chance of dizziness or an excessive pressure drop.

Who is it for
  • Adults seeking focused circulation support
  • Users who prefer a clearly measured arginine serving
  • People comfortable adjusting intake to their needs
Best for
  • Nitric-oxide precursor support
  • General circulation support
  • Flexible amino-acid supplementation

Pros

  • Combines two complementary amino acids
  • Convenient one-capsule serving
  • Low serving cost

Cons

  • Arginine amount is low for targeted use
  • Ornithine amount is also modest
  • Several capsules are needed for a larger intake

Warnings

  • L-arginine may add to the blood-pressure-lowering effects of nitrates or antihypertensive medicines, increasing the chance of dizziness or an excessive pressure drop.

Nutrient quality

73 High impact

L-ornithine hydrochloride is specific, while the L-arginine form has no purity or grade detail. The arginine amount is low for targeted circulation or performance use.

Ingredient transparency

79 High impact

Every listed active ingredient has a specific disclosed amount. Non-active ingredients and excipients are not provided.

Customer satisfaction

70 High impact

The supplied average rating is very strong. The substantial rating sample provides good statistical confidence.

Value for money

81 Highest impact

The simple pairing provides acceptable quality but limited arginine depth. The low serving cost partly offsets the light active amount.

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Ingredients

IngredientAmount per serving
L-Arginine
500 mg
L-Ornithine (L-Ornithine Hydrochloride)
 250 mg
Adults 18–50
Report overview
Arginine · 500 mg OverallScore63
C+ Active Ingredient Quality & BioavailabilityD+ Dose, Safety & Label TransparencyB+ Value

L-arginine is clearly identified, though no branded or grade-based purity claim is provided. One capsule is convenient, but the 500 mg serving is low for circulation or fitness goals. A low cost per gram gives it good value for users willing to take additional servings.

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85 Performance

L-Arginine Pure Powder

Best Naturals
<p>Ingredient form, amount, and goal fit make the option a stronger quality-focused alternative to the original. L-arginine is clearly identified, though no premium source or processing detail is supplied.</p>
80 Performance

L-Arginine 3000 mg

Natrol
<p>Ingredient form, amount, and goal fit make the option a stronger quality-focused alternative to the original. A performance-focused arginine amount provides substantial nitric-oxide pathway depth, with B vitamins adding a secondary metabolic role.</p>
73 Performance

Nitri Oxide Support

Pure Encapsulations
<p>Ingredient form, amount, and goal fit make the option a stronger quality-focused alternative to the original. A substantial arginine alpha-ketoglutarate (AAKG) amount and vitamin C provide a coherent exercise-circulation base.</p>
81 Budget

L-Arginine 500 mg

Best Naturals
<p>A lower serving cost makes the alternative an economical way to keep L-arginine central. L-arginine hydrochloride is a clear, soluble standard form.</p>
80 Budget

L-Arginine 700 mg

NOW
<p>Lower per-serving cost improves value while preserving an L-arginine-focused formula. A convenient capsule provides an intermediate arginine amount with excellent serving value.</p>
80 Budget

L-Arginine 500 mg

Swanson
<p>Value is stronger on cost because the option still centers on L-arginine. A focused one-capsule formula provides basic L-arginine with a large supply.</p>
84 Value

Arginine 1000 mg

Jarrow Formulas
<p>The balance of formula quality and serving economics is more favorable than the original. L-arginine hydrochloride is a clear, soluble standard form.</p>
83 Value

L-Arginine 1000 mg

21st Century
<p>The balance of formula quality and serving economics is more favorable than the original. A clearly identified hydrochloride form provides a moderate amount in one convenient tablet.</p>
74 Value

Wellness ImmuNitric

Source Naturals
<p>The balance of formula quality and serving economics is more favorable than the original. A substantial arginine amount with modest citrulline and B-vitamin support creates a coherent vascular formula at favorable value.</p>
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