Arginine is a conditionally essential amino acid, necessary for urea metabolism, DNA generation and protein creation! It's also a precursor of nitric oxide (NO), thereby helping to promote the relaxation of blood vessels.*
Natural color variation may occur in this product.

This product is sold by weight not volume.

NOW® L-Arginine is pharmaceutical grade.

• Pure Powder
• Protein Metabolism*
• Nitric Oxide Precursor*