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Sustained plus Immediate Release L-Arginine 500 mg

Doctor's Best
4.7
★ ★ ★ ★ ★
(1822 ratings)
Arginine 1000 mg
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Score80
Dual-release tablets offer a meaningful delivery advantage at a moderate arginine amount. Value is acceptable rather than exceptional.
How scoring works
Quantity:120 Tablet(s) • (60 servings)
Goals:

Score 80

Dual-release tablets offer a meaningful delivery advantage at a moderate arginine amount. Value is acceptable rather than exceptional.
How scoring works
$18.16($0.30 per serving)
Amazon
$ 20.99
iHerb
$ 20.99
Vitacost
$ 22.79
Vitacost
$ 23.07
Pure Formulas
$ 18.16
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Analysis

A two-tablet serving supplies 1,000 mg of L-arginine through combined immediate and sustained release, directly addressing the amino acid’s short-lived availability. L-arginine is a nitric-oxide precursor, so it may support blood-vessel relaxation and circulation without acting as a stimulant.

The bilayer approach is more purposeful than a basic tablet and may provide both an initial and more gradual release. The amount and pill count are practical, though average cost efficiency means the delivery technology is the main reason to choose it.

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 immediate and sustained release
  • Moderate 1,000 mg serving
  • Serving can be split across two tablets

Cons

  • Full serving requires two tablets
  • Cost efficiency is only average
  • Amount remains below higher fitness-focused intakes

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

88 Highest impact

Combined immediate and sustained release addresses the short-lived availability of standard arginine. The amount is moderate rather than fully performance focused.

Ingredient transparency

81 Highest impact

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

Customer satisfaction

71 High impact

The supplied average rating is strong. The large rating sample provides strong statistical confidence.

Value for money

79 High impact

The delivery design provides above-average quality despite only moderate dose depth. The elevated serving cost is justified mainly by the release technology.

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Ingredients

IngredientAmount per serving
L-Arginine
1000 mg
Gluten Free Adults 18–50 Vegan Vegetarian
Report overview
Arginine · 1000 mg OverallScore72
B+ Active Ingredient Quality & BioavailabilityB- Dose, Safety & Label TransparencyD+ Value

The bilayer tablet combines immediate and sustained release, addressing arginine's short-lived availability better than standard formats. Its 1,000 mg serving is moderate and comes from two tablets. Cost efficiency is middling, so the delivery technology is the main reason to choose it.

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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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