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Arginine & Citrulline 500 mg / 250 mg

NOW Sports
4.7
★ ★ ★ ★ ★
(6570 ratings)
Arginine 500 mg
Citrulline 250 mg
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Score78
A large economical bottle improves long-term value, but the one-capsule serving remains substantially underdosed.
How scoring works
Quantity:240 Capsule(s) • (240 servings)
Goals:

Score 78

A large economical bottle improves long-term value, but the one-capsule serving remains substantially underdosed.
How scoring works

Also available as

1 option
120 servings Arginine 500 mg, Citrulline 250 mg • 120 Capsule(s) • 120 servings $15.60 ($0.13 per serving)
$23.76($0.09 per serving)
Amazon
$ 25.59
iHerb
$ 30.61
Vitacost
$ 32.49
Daily Vita
$ 28.90
Daily Vita
$ 23.76
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Analysis

Each capsule combines 500 mg of L-arginine with 250 mg of L-citrulline. Pairing the two makes physiological sense for nitric-oxide production and blood-flow support.

The main limitation is quantity rather than form. A single serving falls well short of performance-oriented intakes, especially for citrulline, and taking several capsules erodes the apparent convenience.

The 240-capsule package supports a longer routine and strong serving economy. It fits low-dose users or people who deliberately scale capsules, not buyers seeking a complete pre-workout serving in one unit.

Who is it for
  • Adults wanting a large supply of low-dose capsules
  • People who prefer adjustable dosing
  • Users seeking basic circulation support
Best for
  • Longer low-dose routines
  • Budget-focused amino-acid use
  • People willing to take multiple capsules

Pros

  • Large capsule count
  • Clear individual amino-acid amounts
  • Logical arginine and citrulline pairing

Cons

  • Low dose per capsule
  • Several capsules needed for targeted use
  • No sustained-release or absorption feature

Warnings

  • Arginine and citrulline may add to nitrates, blood-pressure medicines, or PDE-5 inhibitors and cause dizziness or excessive blood-pressure lowering.
  • Arginine can trigger herpes simplex recurrences in some susceptible users.
  • Higher amino-acid intake may cause nausea, cramping, or diarrhea.

Nutrient quality

75 High impact

The clearly named amino acids form a coherent nitric-oxide combination. Very low amounts substantially limit practical dose quality.

Ingredient transparency

81 Highest impact

Active quantities and amino-acid forms are clearly disclosed without a hidden blend. Missing full directions and non-active ingredients leave the label incomplete.

Customer satisfaction

72 High impact

The supplied average rating is very strong and the rating volume is substantial. No specific experience details were provided to judge repeated complaints or purpose alignment.

Value for money

84 Highest impact

The formula provides fair value for its cost. It remains moderately competitive but does not clearly lead the category.

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Ingredients

IngredientAmount per serving
L-Arginine
500 mg
L-Citrulline
250 mg
Gluten Free Adults 18–50 Kosher Dairy Free
Report overview
Arginine · 500 mg OverallScore59
C+ Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyB+ Value

The formula clearly combines 500 mg of L-arginine with 250 mg of L-citrulline, though the arginine amount is low as a single serving. Citrulline may complement nitric-oxide support, but larger arginine intake still requires several capsules. The larger bottle offers good cost efficiency with no special release technology.

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Citrulline · 250 mg OverallScore52
B- Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyD- Value

Pure L-citrulline gives the formula a clearly identified and concentrated active form. The 250 mg serving remains far below amounts commonly used for targeted nitric-oxide or exercise support. The larger bottle improves serving economy, but cost per gram is still only moderate and an effective intake would require many capsules.

View ingredientView products
Loading alternative details
67 Performance

Pump-Ocalypse Blue Raz

Bucked Up
Glycerol, citrulline, arginine, and agmatine form a coherent stimulant-free pump formula, but several amounts are moderate rather than full strength. An opaque mushroom blend and low betaine amount weaken dose quality and disclosure. Compared with the original, its Arginine and Citrulline coverage and stronger formulation depth make it a better quality-focused match.
74 Performance

Wellness ImmuNitric

Source Naturals
A substantial arginine amount with modest citrulline and B-vitamin support creates a coherent vascular formula at favorable value. Duplicate folate entries reduce clarity, and the three-tablet serving may add to the effects of nitrates or blood-pressure medicines. Compared with the original, its Arginine and Citrulline coverage and stronger formulation depth make it a better quality-focused match.
77 Performance

Arginine & Citrulline 500 mg/250 mg

NOW Sports
Clearly disclosed L-arginine and L-citrulline provide a focused nitric-oxide formula at a low serving cost. Both amounts are far below targeted performance ranges, so meaningful use would require many capsules. Compared with the original, its Arginine and Citrulline coverage and stronger formulation depth make it a better quality-focused match.
79 Budget

L-Arginine + L-Citrulline 750 mg

Nutricost
A large supply of clearly separated L-arginine and L-citrulline provides economical but basic nitric-oxide support. Both amounts are too low for targeted performance use without taking multiple capsules. Compared with the original, its lower serving cost improves affordability while retaining Arginine and Citrulline support.
78 Budget

L-Arginine L-Citrulline Complex 1000 mg

Best Naturals
L-arginine hydrochloride and free-form citrulline provide a focused combination with good supply economy. The arginine amount is only moderate and the citrulline amount is far below targeted performance use. Compared with the original, its lower serving cost improves affordability while retaining Arginine and Citrulline support.
80 Budget

L-Arginine 700 mg

NOW
A convenient capsule provides an intermediate arginine amount with strong serving value. No premium grade or sustained release is identified, and multiple capsules would be needed for stronger targeted use. Compared with the original, its lower serving cost improves affordability while retaining Arginine support.
73 Value

Wellness ImmuNitric

Source Naturals
A substantial arginine amount with modest citrulline and B-vitamin support creates a coherent vascular formula at reasonable value. Duplicate folate entries reduce label clarity, and the vasodilating combination may add to nitrates or blood-pressure medicines. Compared with the original, its Arginine and Citrulline coverage and balance of formula depth and serving cost provide better practical value.
80 Value

Nitric Oxide Booster

Nutricost Performance
Three arginine forms provide a moderate combined amount and clear nitric-oxide focus at favorable value. Citrulline remains underdosed, and the undisclosed citrulline-malate ratio makes its active contribution uncertain. Compared with the original, its Arginine and Citrulline coverage and balance of formula depth and serving cost provide better practical value.
73 Value

Nitri Oxide Support

Pure Encapsulations
A substantial AAKG amount and vitamin C provide a coherent exercise-circulation base. Citrulline malate is underdosed with an undisclosed ratio, while the relatively costly serving weakens value. Compared with the original, its Arginine and Citrulline coverage and balance of formula depth and serving cost provide better practical value.
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