NOW Supplements L-Arginine 1 000 mg Nitric Oxide Precursor* Amino Acid 120 Tablets
Analysis updated October 2026 · How Scout scores
At a glance
Summary
This supplement contains L-Arginine, a beneficial amino acid known for supporting cardiovascular health and enhancing exercise performance. The formulation is clean with minimal additives, primarily using cellulose-based ingredients for tablet formation. The absence of artificial sweeteners, dyes, or harmful preservatives contributes to its high score, reflecting a focus on ingredient quality and safety.
Key ingredients 7
L-ArginineVery Good
L-Arginine is an amino acid that serves as a precursor to nitric oxide, which is important for cardiovascular health. It is known to improve blood flow and may enhance exercise performance. As a high-quality active ingredient, it is beneficial for supporting overall health and wellness.
Benefits
L-Arginine supports cardiovascular health by promoting nitric oxide production, which helps improve blood flow and may enhance exercise performance.
Microcrystalline CelluloseNeutral
Microcrystalline Cellulose is a common filler and binder used in supplements to provide structure. It is derived from plant fibers and is generally considered safe for consumption. It does not contribute any nutritional value but is necessary for tablet formulation.
See more about Microcrystalline Cellulose →Hydroxypropyl CelluloseNeutral
Hydroxypropyl Cellulose is used as a thickener and stabilizer in supplements. It is a chemically modified cellulose that helps maintain tablet integrity. It is considered safe and inert, with no direct health benefits.
See more about Hydroxypropyl Cellulose →Stearic AcidNeutral
Stearic Acid is a fatty acid used as a lubricant in tablet manufacturing. It is derived from vegetable sources and is generally recognized as safe. It does not provide nutritional benefits but aids in the manufacturing process.
See more about Stearic Acid →Croscarmellose SodiumNeutral
Croscarmellose Sodium is a disintegrant used to help tablets dissolve properly in the digestive tract. It is a cellulose derivative and is considered safe for use in supplements. It does not offer nutritional benefits but is important for effective tablet dissolution.
See more about Croscarmellose Sodium →Silicon DioxideNeutral
Silicon Dioxide is used as an anti-caking agent to prevent clumping in supplements. It is a naturally occurring mineral and is considered safe for consumption. It does not provide nutritional benefits but ensures product stability.
See more about Silicon Dioxide →Vegetarian CoatingNeutral
The Vegetarian Coating consists of hypromellose, calcium carbonate, and glycerin, used to create a protective layer on tablets. These components are generally recognized as safe and help improve the tablet's appearance and swallowability. They do not contribute nutritional value but are important for product quality.
Processing
Processed Foods
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