Valuable, free-form amino acid nutrition

Provides fundamental nourishment for immune and cardiovascular systems

Teams with methionine and glycine to aid the making of energy in your muscles

400 capsules arrive in two bottles of 200 capsules each

Get fundamental amino acid nutrition for less with Swanson L-Arginine. Our L-arginine makes an economical and effective addition to your dietary plan, especially if you are concerned with cardiovascular and immune system health. Each convenient capsule delivers 500 mg of free-form l-arginine.