NOW Foods L-Arginine, 500 mg, 250 Veg Capsules

NOW Foods L-Arginine 500 mg Veg Capsules is a single-ingredient amino acid supplement designed to provide free-form L-arginine. The manufacturer describes arginine as a conditionally essential amino acid involved in urea metabolism, DNA synthesis, and protein production, and notes it is a precursor to nitric oxide, which plays a role in blood vessel dilation.

This product uses pharmaceutical-grade L-arginine, a specification highlighted by NOW Foods to indicate purity. The suggested usage is two capsules twice daily between meals or at bedtime, providing 1,000 mg of L-arginine per serving. It is available in two sizes: 100 and 250 vegetable capsules, with the latter offering 125 servings. Notable certifications include Non-GMO, Vegan, Kosher (Triangle K), and Intertek GMP Supplement Certification, which are common for this brand but reinforce quality standards. The capsules are vegetarian, using hypromellose cellulose shells with vegetable-based stearic acid and silicon dioxide.