NOW Foods Arginine & Ornithine 500mg 250mg 100 Veg Capsules

NOW® Arginine & Ornithine brings together two amino acids that work as partners in the body's nitrogen-handling machinery. L-arginine is the precursor to nitric oxide and supports healthy circulation, while L-ornithine works alongside it in the urea cycle — the pathway the body uses to clear excess nitrogen (ammonia) generated by protein metabolism. Because the two aminos interconvert within this cycle, combining them supports protein metabolism, muscle maintenance, circulation and the body's natural recovery processes, making this a popular choice among athletes.*

About the key ingredients

• L-Arginine – 500 mg: A nitric-oxide precursor that supports protein metabolism, muscle maintenance and healthy circulation.*
• L-Ornithine – 250 mg: An amino acid that partners with arginine in the urea cycle, supporting the body's nitrogen-clearing and recovery processes.*
• Other ingredients: Cellulose in a plant-based hypromellose (vegetarian) capsule, with no artificial fillers.

Who it's for

NOW® Arginine & Ornithine is designed for athletes and hard-training adults who want combined support for circulation, protein metabolism and the body's recovery processes. The pairing appeals to those focused on the demands of intense exercise, when the body works harder to clear the byproducts of protein breakdown, as well as anyone interested in supporting healthy blood flow and nitrogen balance. It's commonly taken on an empty stomach, and often before bed, to complement the body's natural overnight recovery.*

Suggested use

Take 2 capsules daily as needed, preferably with juice or water on an empty stomach, before exercise or at bedtime. Store in a cool, dry, dark place after opening.

Quality & certifications

• Family Owned Since 1968
• GMP Quality Assured
• Made in the USA
• Halal
• Informed Sport Certified
• Kosher
• Non-GMO
• Steroid Tested
• UL Dietary Supplement Certified
• Vegan

Frequently asked questions

What is the urea cycle?
It's the body's process for clearing excess nitrogen (ammonia) from protein metabolism; both ornithine and arginine take part in it.*

How do I take it?
Take one serving one to two times daily on an empty stomach.*

Is it vegetarian?
Yes — plant-based veg capsules.*

Cautions & interactions

As with any supplement, talk to your doctor before adding this product to your routine if you are pregnant or nursing, taking prescription medication, or managing a health condition. Keep it out of reach of children, store it in a cool, dry place, and don't exceed the recommended serving. Amino acids that support the nitric-oxide pathway may affect circulation, so if you take medication for blood pressure or are scheduled for surgery, check with your doctor before using arginine-based products, and avoid combining several nitric-oxide supplements at once without guidance.

Allergen information: Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Caution: For adults only. Do not use if history of myocardial infarction or established coronary artery disease. Consult physician if pregnant/nursing, taking medication, or have a medical condition (including herpes and/or glaucoma). Keep out of reach of children.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.