L-Arginine from Swanson is a supplement in capsule form, supplied in a pack of 200 capsules. Each capsule contains 500 mg of L-Arginine as a free-form amino acid. Ingredients: L-Arginine (free-form amino acid) 500 mg Other ingredients: Gelatin, may contain one or more of the following: microcrystalline cellulose (plant fiber), magnesium stearate, silica Ingredients L-Arginine (free-form amino acid) 500 mg. Other ingredients: Gelatin, may contain one or more of the following: microcrystalline cellulose (plant fiber), magnesium stearate, silica. Allergens No allergens explicitly declared on label. Contains gelatin (animal-derived). Directions As a dietary supplement, take one capsule one to two times per day with water. Warnings Not intended for use by children or pregnant women. Consult your healthcare provider before use if you have renal or liver disease. Reduce dosage if you experience nausea, abdominal cramps or diarrhea. Storage Store in a dry, cool place out of reach of small children. Country of origin United States