NOW Foods L-Citrulline, 750 mg (90 Veg Capsules) —  (Pakistan Market)

The Same Core Caution as Our L-Arginine Listing, and Why

We also carry NOW Foods' L-Arginine, and it's worth understanding these two products as closely related rather than entirely separate: L-Citrulline converts to L-Arginine in the body, which is then used to produce nitric oxide — meaning citrulline supplementation ultimately feeds into the same blood-vessel-relaxation pathway that arginine works on directly. This is exactly why the same core caution applies here: consult a physician if you are pregnant, nursing, taking medication (especially blood pressure medications, nitrates, or other vasodilating drugs), or have a medical condition, especially abnormal blood pressure. If you're on any of these medications, please have this conversation with your doctor before starting citrulline, the same way we've recommended for arginine.

Why Some People Prefer Citrulline Over Direct Arginine

Interestingly, citrulline is often considered by researchers to be at least as effective, and in some contexts more effective, at ultimately raising nitric oxide levels than taking arginine directly. This is because a meaningful portion of orally consumed arginine gets broken down in the liver before it ever reaches general circulation, while citrulline largely bypasses this initial liver processing, converting to arginine more efficiently once it's already circulating in the body. This is a genuine, well-understood pharmacological reason some people specifically choose citrulline, rather than simply a marketing preference.

A Second, Distinct Role: Ammonia Detoxification

Beyond the nitric oxide pathway, citrulline is also a key intermediate in the urea cycle, working alongside arginine and ornithine to help the body clear ammonia, a byproduct generated during protein metabolism. This gives citrulline a dual role — supporting circulation on one hand, and supporting the body's handling of protein metabolism byproducts on the other — which is part of why it's particularly popular among people following higher-protein diets or engaged in regular strength training.

A Practical Timing Note

The label recommends taking this between meals, since taking it away from protein-heavy meals specifically may support better absorption.

A Combined Option Also Exists

NOW Foods also sells an Arginine & Citrulline combination product (500mg arginine, 250mg citrulline), for anyone who wants both amino acids together in one capsule rather than choosing between them or stacking two separate standalone products.

A Simple, Vegetarian Formula

The capsule is Hypromellose, a plant-based cellulose material, with magnesium oxide and stearic acid rounding out the formula — fully vegetarian, with no Halal sourcing ambiguity.

Ingredient Breakdown

Non-GMO. Vegetarian/Vegan. Kosher. Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, or tree nut ingredients.

Dosage Chart

This Product vs. Our L-Arginine Listing