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L-Arginine 500 mg

Natural Factors
4.7
(2086 ratings)
Arginine 1000 mg
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Score93

A reliable 45-day supply of L-arginine capsules designed to support nitric oxide levels and healthy blood flow.

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Quantity:90 Capsule(s)(45 servings)
Goals:

Score 93

A reliable 45-day supply of L-arginine capsules designed to support nitric oxide levels and healthy blood flow.

How scoring works
$9.77($0.21 per serving)
Amazon
$ 11.75
iHerb
$ 9.77
Vitacost
$ 9.77
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Analysis

Like its larger counterpart, this product offers 500mg of L-arginine hydrochloride per capsule. Taking two capsules daily can contribute to healthy circulation by supporting the pathways that relax blood vessels. It is a very clean formula that is often used for general heart and vascular maintenance.

This 90-count bottle is a great starting point if you want to see how your body responds to arginine. It fits easily into a travel bag or a small medicine cabinet while providing a 45-day supply.

Pros

  • Compact bottle size
  • Simple and clear dosing
  • Capsules are easier to swallow than tablets
  • Good for those new to arginine

Cons

  • Lower total capsule count per bottle
  • Gelatin-based capsules
  • Serving requires two capsules

Warnings

  • Talk to a professional if you are pregnant or nursing
  • May interact with certain heart medications
  • Store in a cool, dry place

Nutrient quality

92 Highest impact

Selection of the hydrochloride form ensures efficient solubility and absorption of the amino acid. A meaningful 1000mg dose provides reliable support for cardiovascular pathways and physical performance.

Ingredient transparency

93 Highest impact

Labeling clearly identifies the amount of active L-arginine provided in every serving. Intake directions are transparent, though a naming discrepancy regarding the milligram weight is noted.

Customer satisfaction

94 Highest impact

High average rating of 4.65 across over 2,000 reviews demonstrates consistent product efficacy. Strong user feedback confirms the reliability of the supplement for supporting circulatory health.

Value for money

93 Highest impact

Cost per serving of 0.21 is very reasonable for a high-potency arginine supplement. The 90-count bottle offers a practical entry point for those beginning a vascular support regimen.

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Ingredients

IngredientAmount per serving
L-Arginine (L-Arginine Hydrochloride)
1000 mg
Gluten Free Adults 18–50 Vegan Dairy Free Sugar Free Vegetarian
Report overview
C+ Active Ingredient Quality & BioavailabilityB- Dose, Safety & Label TransparencyB+ Value
This arginine supplement provides foundational support for circulatory health from a trusted brand. It is an easy-to-absorb formula designed for individuals starting on vascular health support.
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