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NOW Supplements L-Arginine 500 mg Nitric Oxide Precursor* Amino Acid 250 Veg Capsules

Common questions

Is NOW Supplements L-Arginine 500 mg Nitric Oxide Precursor* Amino Acid 250 Veg Capsules healthy?

NOW Supplements L-Arginine 500 mg Nitric Oxide Precursor* Amino Acid 250 Veg Capsules scores 90/100 on Scout's independent analysis of ingredients, additives, and lab results — one of the stronger scores in Scout's catalog. This supplement contains L-Arginine, a beneficial amino acid that supports cardiovascular health and exercise performance.

How processed is NOW Supplements L-Arginine 500 mg Nitric Oxide Precursor* Amino Acid 250 Veg Capsules?

NOW Supplements L-Arginine 500 mg Nitric Oxide Precursor* Amino Acid 250 Veg Capsules is NOVA Group 3: Processed Foods.

Which ingredients drive NOW Supplements L-Arginine 500 mg Nitric Oxide Precursor* Amino Acid 250 Veg Capsules' score?

In Scout's ingredient-by-ingredient analysis, L-Arginine counts in its favor. The full breakdown, with why each one matters, is in the Key ingredients section on this page.

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NOW Supplements L-Arginine 500 mg Nitric Oxide Precursor* Amino Acid 250 Veg Capsules

NOW
90 Excellent

Analysis updated October 2026 · How Scout scores

$16.47 · 250 count · $0.07 / count
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At a glance

Beneficial ingredients 1
Harmful ingredients 0
Category Electrolytes
Summary

This supplement contains L-Arginine, a beneficial amino acid that supports cardiovascular health and exercise performance. The formulation is clean, with minimal additives such as hypromellose, stearic acid, and silicon dioxide, which are generally considered safe. The product avoids harmful ingredients like artificial dyes and sweeteners, resulting in a high-quality supplement with a low level of processing concerns.

Key ingredients 4

L-Arginine
Very Good

L-Arginine is an amino acid that serves as a precursor to nitric oxide, which is important for cardiovascular health. It is often used to improve blood flow and may enhance exercise performance. As a free-form amino acid, it is easily absorbed and utilized by the body.

Risks

Excessive intake may lead to gastrointestinal discomfort or interact with certain medications.

Benefits

Supports cardiovascular health by promoting nitric oxide production, which helps in vasodilation and improved blood circulation.

See more about L-Arginine →
Hypromellose
Neutral

Hypromellose is a cellulose-based compound used to form the capsule shell. It is a common ingredient in vegetarian capsules and is considered safe for consumption. It does not contribute any nutritional value or active health benefits.

Benefits

Provides a vegetarian alternative to gelatin capsules, suitable for those following plant-based diets.

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Stearic Acid
Neutral

Stearic acid is a fatty acid used as a lubricant in supplement manufacturing. It is derived from vegetable sources and is generally recognized as safe. It does not have any significant health benefits or risks when used in small amounts.

Benefits

Helps in the manufacturing process by preventing ingredients from sticking to equipment.

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Silicon Dioxide
Neutral

Silicon dioxide is used as an anti-caking agent to prevent clumping in powdered supplements. It is a naturally occurring mineral and is considered safe for consumption. It does not provide any nutritional benefits.

Benefits

Ensures the consistency and quality of the supplement by preventing clumping.

See more about Silicon Dioxide →

Processing

Group 3 · Processed

Processed Foods

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Amazon pricing & content

Amazon price as of . Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.

CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON. THIS CONTENT IS PROVIDED “AS IS” AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.

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