Spring Valley L-Arginine Dietary Supplement Capsules are specially formulated to support heart health*. Each capsule delivers 500 mg of L-Arginine, an amino acid that stimulates the production of nitric oxide and supports cardiovascular health*. These capsules are free from gluten, yeast, wheat, milk or milk derivatives, lactose, sugar, soy, and artificial colors and flavors, and contain less than 5 milligrams of sodium per serving. The suggested adult dosage is two capsules three times daily, preferably in between meals.