Zein Pharma L-Arginine + L-Citrulline is a dietary supplement that helps nitric oxide production for better blood flow and improved exercise performance. Packed with two key ingredients, this formula helps nitric oxide production to support blood flow during workouts. Built on Zein Pharma's commitment to top quality, it's made in WHO GMP facilities with ongoing testing and traceability. Fits into busy schedules quickly and easily.

Available Sizes & Variants:

90 capsules – a convenient daily dose for ongoing support

Benefits & Features:

• Boosts nitric oxide for better blood flow.
• L-arginine and L-citrulline work together to back exercise performance and quicker recovery after training.
• Daily use, you know, to help keep vascular health going along with l arginine supplements.
• Produced in a WHO GMP facility with robust batch testing for safety and purity.
• The star combo of arginine and citrulline offers a practical dietary supplement approach to backing nitric oxide availability, which helps smooth blood flow during workouts and supports endurance over time.

Zein Pharma has built a solid reputation since 2019 for quality and safety, and this product shows that heritage. It’s made in a WHO GMP facility with strict testing and traceability, ensuring consistent purity. While some blends use citrulline malate, this formula sticks with pure L-arginine and L-citrulline to help nitric oxide stay available. The brand keeps transparency and strict quality checks, delivering a dependable dietary supplement for your training routine.

L-arginine, L-citrulline, Hydroxypropyl methylcellulose, Ascorbyl Palmitate.

• GTIN: 4260085385539
• Manufacturer: Zein Pharma
• Categories: Arginine SupplementsCitrulline SupplementsEnergy Vitamins, Supplements & Tablets SupplementsL-Arginine Supplements & TabletsNitric Oxide Boosters SupplementsStamina & Endurance SupplementsZein Pharma Products
• 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.

Swallow 6 capsules daily (3 capsules in the morning and 3 capsules in the evening) whole and with plenty of water. If necessary, you can also open the capsules and stir their contents into a drink or meal. Store in a cool, dry place away from direct sunlight. Caution: the pack contains a dry bag that is not suitable for consumption. Please seek advice from a health care professional before taking if you are pregnant or nursing. Keep away from children. The recommended daily dosage should not be exceeded.

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

L-Arginine is an amino acid that helps to support and maintain the production of nitric oxide, supporting normal blood flow and vascular function.

This blend brings together L-Arginine and L-Citrulline, with L-Arginine identified as the main active ingredient and L-Citrulline providing additional support to the overall nitric oxide pathway.

What Does L-Arginine Do?

L-Arginine helps to boost nitric oxide availability, which can aid blood flow during activity and may influence exercise capacity as part of normal physiological processes.

The pairing of L-Arginine and L-Citrulline helps the body’s nitric oxide pathway, supporting steady vascular function and endurance through regular activity.

This product isn't intended to diagnose, treat, cure, or prevent any disease.

Zein Pharma is a well-regarded pharmaceutical manufacturer dedicated to quality, safety and efficacy. The brand operates in a WHO-GMP certified facility with segregated production areas, cleanroom standards and rigorous in‑process and final QC testing, alongside comprehensive microbial and analytical assessments. This level of manufacturing discipline aligns with Welzo's commitment to consistent safety and purity across products and is reinforced by Zein Pharma’s stated focus on transparency and stakeholder well‑being.

Welzo’s medical team, described here Welzo's healthcare professionals, evaluated Zein Pharma against our criteria for quality, traceability and compliance, and we reference our rigorous testing protocols to ensure every batch meets high standards. This brand’s heritage since 2019 as a dedicated quality‑driven manufacturer underpins our confidence in their production philosophy and continuous quality improvement.

For Zein Pharma L-Arginine + L-Citrulline, the combination suits a research‑backed approach to amino acid supplementation, and the brand’s robust QA framework supports reliable potency and purity. This alignment with our selection criteria and our partnership rationale makes Zein Pharma our trusted supplier for this supplement.