L-Arginine

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

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About this item

Descriptions and specifications

CONDITIONALLY ESSENTIAL AMINO ACID: Arginine is a conditionally essential basic amino acid involved primarily in urea metabolism and excretion, as well as in DNA synthesis and protein production.*

NITRIC OXIDE PRECURSOR*: Arginine plays an important role in the dilation of blood vessels.*

CLASSIFICATIONS/CERTIFICATIONS: Non-GMO, Kosher (contains gelatin), Soy Free


GMP Quality Assured: NOW closely adheres to both mandatory U.S. FDA Current Good Manufacturing Practices (CGMP) regulations and voluntary Natural Products Association (NPA) Good Manufacturing Practices (GMP) regulations. Good manufacturing practices ensure compliance with sanitation, processing, documentation, and testing requirements that are designed to promote consistent, highly reproducible product quality and safety.


Packaged in the USA by a family owned and operated company since 1968


During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers’ recommendations, when provided.

Brand NOW
Primary Supplement Type Protein
Unit Count ‎250 Count
Item Form Capsule
Item Weight ‎0.22 Kilograms
Age Range ‎Adult

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