NOW Foods Arginine & Citrulline 500mg 250mg 120 Veg Capsules

NOW® Arginine & Citrulline combines two complementary amino acids — 500 mg of L-arginine with 250 mg of L-citrulline — in each serving. Arginine is the direct precursor to nitric oxide, the molecule that helps blood vessels relax, while citrulline is efficiently converted by the body into more arginine, helping to sustain arginine levels for longer-lasting support of the nitric-oxide pathway. Together they support protein metabolism, healthy muscle tissue and circulation, a combination especially valued by athletes and active adults.*

About the key ingredients

• L-Arginine – 500 mg: A nitric-oxide precursor that supports protein metabolism, muscle maintenance and healthy circulation.*
• L-Citrulline – 250 mg: An amino acid the body converts into arginine, helping sustain arginine levels and the nitric-oxide pathway.*
• Other ingredients: Cellulose in a plant-based hypromellose (vegetarian) capsule, with no artificial fillers.

Who it's for

NOW® Arginine & Citrulline is a natural fit for athletes, weight trainers and active adults who want longer-lasting nitric-oxide and circulation support around their workouts. Because citrulline helps sustain arginine levels, it also appeals to those who found plain arginine short-lived, as well as anyone looking to support healthy blood flow, nutrient delivery to muscles and exercise performance. Many users take it before training and, in the powder form, appreciate being able to adjust the serving to their goals.*

Suggested use

Take 1 capsule 2 times daily Store in a cool, dry, dark place after opening.

Quality & certifications

• Family Owned Since 1968
• GMP Quality Assured
• Made in the USA
• Halal
• Keto-Friendly
• Kosher
• Non-GMO
• UL Dietary Supplement Certified
• Vegan

Frequently asked questions

Why combine arginine and citrulline?
Citrulline is converted to arginine in the body, helping sustain arginine levels and support the nitric-oxide pathway more effectively than arginine alone.*

How do I take it?
Take one serving one to three times daily, ideally away from food.*

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. Consult physician if pregnant/nursing, taking medication (especially antihypertensives, nitrates, or other heart medications), or have a medical condition (especially herpes, kidney impairment 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.