Source Naturals L-Arginine, Free Form, 1,000 mg, 100 Tablets

Amino Acid Supplement Free-Form Promotes Increased Circulation L-Arginine is a crystalline free-form amino acid. It is an important factor in muscle metabolism and works to transport, store, and excrete nitrogen. It is also a precursor of guanidine-phosphate, phosphoarginine, and creatine, which are high-energy compounds found in muscles.

Dietary Supplement Promotes Increased Circulation