NOW Foods Arginine & Citrulline Powder supports nitric oxide production and healthy circulation, helping to optimise exercise performance with a balanced arginine and citrulline blend. The star ingredients are L-Arginine and L-Citrulline in a 1:1 ratio, designed for daily use by active lifestyles. NOW Foods backs its products with GMP quality assurance and certifications like Informed-Sport, reflecting a long standing commitment to purity and safety.

Available Sizes & Variants:

340 grams powder – convenient tub for daily use by active individuals.

Benefits & Features:

• Balanced 1:1 arginine to citrulline ratio.
• Supports nitric oxide production and healthy circulation to help optimise workouts, speed recovery after training, and maintain steady performance across sessions throughout the day consistently.
• Free from common allergens and suitable for keto diets.
• Manufactured in a GMP facility with non GMO ingredients, designed for daily use by sports nutrition enthusiasts seeking a clean amino acid blend.
• Suitable for mixing into protein powder and other sports nutrition supplements.

NOW Foods has a long standing reputation for quality and transparency. This powder uses free form amino acids in a simple 1:1 blend of arginine to citrulline, manufactured in GMP facilities and free from major allergens. The brand’s non-GMO, steroid-free approach appeals to athletes, while Informed-Sport and Informed-Choice certifications reassure clean testing for competitive events. It’s a dependable, straightforward addition to a daily routine, designed to sit comfortably alongside protein powder and other sports nutrition supplements.

L-Arginine (Free-Form), L-Citrulline (Free-Form)

• GTIN: 733739002044
• Manufacturer: NOW Foods
• Categories: Arginine SupplementsBest SellersCitrulline SupplementsNitric Oxide Boosters SupplementsNOW FoodsSports Supplements Black Friday SaleStamina & Endurance Supplements
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Mix 1 level teaspoon (approximately 3 g) twice daily in 240 ml of water or another beverage, preferably on an empty stomach. Store in a cool, dry, dark place after opening. For adults only. Consult a 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. Do not eat freshness packet enclosed.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: L-Arginine

L-Arginine is a readily accessible amino acid used in protein metabolism and many physiological processes. This formulation shows L-Arginine in free-form amino acid form for quick, easy utilisation.

This product also contains L-Citrulline in balance to support the amino acid profile, which could affect nitric oxide production and circulation through sustained arginine availability.

What Does L-Arginine Do?

L-Arginine takes part in regular production of nitric oxide, which helps to support healthy circulation and blood flow across daily activity and exercise. Scientific work suggests arginine involvement in muscle perfusion and exercise-related recovery processes, aligning to standard vascular function.

Research references note the arginine-citrulline combination may enhance nitric oxide synthesis and muscle recovery, with emphasis on daily activity and exercise contexts.

This product is not intended to diagnose, treat, cure, or prevent any disease.

NOW Foods shows an unwavering dedication to quality via its sourcing and making process. The brand is recognised for making products in a GMP facility and for offering free-form amino acids that are non-GMO and keto-friendly, with allergen-conscious formula that is free from wheat, gluten, soy, corn, milk, egg, fish, shellfish and tree nuts. This clear focus on purity and safety aligns with Welzo’s standards for reliability and consumer protection.

Our expectations for transparency, traceability and clean sourcing are supported by NOW Foods’ established quality framework, including Informed-Sport and Informed-Choice certifications that verify testing for banned substances and suitability for athletes. This level of third-party assurance mirrors Welzo’s emphasis on thorough evaluation and ongoing quality monitoring, visible on our rigorous testing protocols.

This brand’s longstanding reputation in the supplement space, combined with a dedicated focus on potency and consistency, makes NOW Foods a strong fit for this Arginine and Citrulline powder. Our team, including Welzo's healthcare professionals, confirmed that NOW Foods meets our product-specific quality standards and is well suited for the British market.