NOW Sports L-Arginine 1000mg Double Strength Tablets - Supports Heart Health, Blood Flow & Athletic Performance - Premium Nitric Oxide Supplement for Workout & Fitness Enthusiasts

• Protein Metabolism*
• Nitric Oxide Precursor*
• Muscle Maintenance*

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.*

This product has twice the L-Arginine (1,000 mg per tablet) as in our regular strength product (500 mg per capsule).

The L-Arginine used in this product is pharmaceutical grade.

Natural color variation may occur in this product.