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Arginine & Citrulline 500 mg / 250 mg

NOW Sports
4.7
★ ★ ★ ★ ★
(8172 ratings)
Citrulline 250 mg
Arginine 500 mg
Product Image
Score93

A bulk 240-count supply of synergistic arginine and citrulline for long-term vascular and circulatory support.

How scoring works
Quantity:240 Capsule(s) • (240 servings)
Goals:

Score 93

A bulk 240-count supply of synergistic arginine and citrulline for long-term vascular and circulatory support.

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)
iHerb
$ 30.61
Amazon
$ 26.82
Vitacost
$ 32.13
Daily Vita
$ 28.90
Daily Vita
$ 23.76
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Analysis

Like the smaller bottle, this provides 500mg of arginine and 250mg of citrulline per capsule. This combination supports the body's natural ability to produce nitric oxide, which is essential for vascular health. Having a larger supply makes it much easier to maintain a daily habit over several months.

This bulk bottle is a practical choice for regular users who want a good price per serving. It is a clean, effective way to support your cardiovascular system over time.

Pros

  • Large 240-count bottle
  • Great value for long-term use
  • Dual precursors for nitric oxide
  • Easy-to-take capsule format

Cons

  • Citrulline content is modest per pill
  • Gelatin capsules
  • Large bottle size for storage

Warnings

  • Check with a doctor if you are on medication
  • Stop use if you feel unusually lightheaded
  • Store in a cool, dry place

Nutrient quality

83 Highest impact

Utilizing both Arginine and Citrulline creates a more sustained nitric oxide response than single-ingredient formulas. While the Citrulline dose is modest per capsule, the purity and form appear well aligned with industry standards.

Ingredient transparency

99 Highest impact

Label clarity is high, with specific doses for each amino acid clearly articulated for the consumer. The disclosure of non-active ingredients follows best practices for transparency.

Customer satisfaction

94 Highest impact

A massive number of reviews and a strong average rating demonstrate broad market acceptance and satisfaction. Users consistently report positive experiences that match the intended cardiovascular support functions.

Value for money

95 Highest impact

The cost per serving is excellent, especially in this larger bottle size, making it a very economical choice. It represents one of the best values in the category for long-term amino acid supplementation.

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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
Citrulline · 250 mg OverallScore64
A+ Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyD- Value
The larger bottle of NOW Sports Arginine & Citrulline offers a better value for the same quality-tested formula. It is a reliable choice for long-term foundational amino acid intake.
View ingredientView products
Arginine · 500 mg OverallScore63
C+ Active Ingredient Quality & BioavailabilityD+ Dose, Safety & Label TransparencyB+ Value
This high-count dual-amino acid supplement enhances nitric oxide levels for better blood flow. It is a cost-effective choice for long-term vascular and athletic performance support.
View ingredientView products
94 Value

L-Arginine 1000 mg

21st Century
4.7
★★★★★
(9825 ratings)
Delivering a higher concentrated dose of arginine hydrochloride in each tablet provides superior value and convenience for daily circulatory support. It simplifies the regimen while ensuring a potent intake of vascular-supporting building blocks.
Other sellers (2)
96 Value

L-Citrulline 1000 mg

Nutricost
4.6
★★★★★
(520 ratings)
Providing a robust dose of citrulline per capsule offers excellent value for enhancing nitric oxide levels over a longer period. This single-ingredient approach ensures you get a clinically relevant amount of active material for a very reasonable price.
Other sellers (1)
91 Value

L-Arginine L-Citrulline Complex

Source Naturals
4.6
★★★★★
(4020 ratings)
Providing a balanced tablet complex with hydrochloride-form arginine ensures reliable absorption and high utility for maintaining vascular tone. This format offers a stable and long-term solution for those seeking to support healthy circulatory pathways.
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93 Performance

N.O. Pro with Beet Root

ZHOU
4.2
★★★★★
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Integrating multiple forms of arginine and citrulline with the added benefit of beet root powder offers a more sophisticated approach to nitric oxide production. This complex formula targets different metabolic pathways to support endurance and vascular efficiency.
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97 Performance

L-Arginine Pure Powder

Best Naturals
4.7
★★★★★
(134 ratings)
Opting for a pure hydrochloride powder allows for precise, clinical-level dosing that far exceeds what typical capsule blends provide. This format maximizes the potential for nitric oxide synthesis and cardiovascular support.
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95 Performance

L-Arginine 3000 mg

Natrol
4.5
★★★★★
(8160 ratings)
Combining high-dose arginine with B vitamins like pyridoxine and cyanocobalamin offers broader support for both blood flow and energy metabolism. This multi-nutrient approach is better suited for those with higher performance or wellness goals.
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92 Budget

L-Arginine + L-Citrulline 750 mg

Nutricost
4.7
★★★★★
(1904 ratings)
Utilizing a similar amino acid ratio in a highly cost-effective capsule format helps maintain healthy blood flow at a lower price point. It provides a clean and reliable source of precursors for nitric oxide synthesis without unnecessary additives.
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94 Budget

L-Arginine 500 mg

Swanson
4.7
★★★★★
(4118 ratings)
Switching to a bulk single-ingredient arginine capsule provides a very low-cost method for supporting foundational circulatory health. This approach is ideal for those prioritizing budget while still ensuring a steady supply of vascular-supporting nutrients.
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94 Budget

L-Arginine 500 mg

California Gold Nutrition
4.7
★★★★★
(10698 ratings)
Selecting this single-active formula in a convenient count provides an accessible starting point for nitric oxide support. It offers excellent purity for daily maintenance of vascular tone and circulatory wellness.
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94 Value

L-Arginine 1000 mg

21st Century
4.7
★★★★★
(9825 ratings)
Delivering a higher concentrated dose of arginine hydrochloride in each tablet provides superior value and convenience for daily circulatory support. It simplifies the regimen while ensuring a potent intake of vascular-supporting building blocks.
Other sellers (2)
96 Value

L-Citrulline 1000 mg

Nutricost
4.6
★★★★★
(520 ratings)
Providing a robust dose of citrulline per capsule offers excellent value for enhancing nitric oxide levels over a longer period. This single-ingredient approach ensures you get a clinically relevant amount of active material for a very reasonable price.
Other sellers (1)
91 Value

L-Arginine L-Citrulline Complex

Source Naturals
4.6
★★★★★
(4020 ratings)
Providing a balanced tablet complex with hydrochloride-form arginine ensures reliable absorption and high utility for maintaining vascular tone. This format offers a stable and long-term solution for those seeking to support healthy circulatory pathways.
Other sellers (3)
93 Performance

N.O. Pro with Beet Root

ZHOU
4.2
★★★★★
(3554 ratings)
Integrating multiple forms of arginine and citrulline with the added benefit of beet root powder offers a more sophisticated approach to nitric oxide production. This complex formula targets different metabolic pathways to support endurance and vascular efficiency.
Other sellers (4)
97 Performance

L-Arginine Pure Powder

Best Naturals
4.7
★★★★★
(134 ratings)
Opting for a pure hydrochloride powder allows for precise, clinical-level dosing that far exceeds what typical capsule blends provide. This format maximizes the potential for nitric oxide synthesis and cardiovascular support.
Other sellers (0)
95 Performance

L-Arginine 3000 mg

Natrol
4.5
★★★★★
(8160 ratings)
Combining high-dose arginine with B vitamins like pyridoxine and cyanocobalamin offers broader support for both blood flow and energy metabolism. This multi-nutrient approach is better suited for those with higher performance or wellness goals.
Other sellers (3)
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