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


Arginine is a conditionally essential basic amino acid involved primarily in urea metabolism and excretion, as well as in DNA synthesis and protein production.* It is an important precursor of nitric oxide (NO) and thus plays a role in the dilation 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.

L-Arginine Powder, 1lb

  • Serving Size: 2 Level Teaspoons (approx. 6 g)

    Servings Per Container: about 76

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