Natrol L-Arginine helps support healthy blood flow through nitric oxide production, helping you train harder and feel more vascular during workouts. Star ingredient supports nitric oxide production, helping blood vessels widen and blood flow improve, which may help with oxygen delivery during workouts and daily activities, contributing to more consistent performance over time. Natrol brings trusted GMP manufacturing and long standing quality to every bottle.

Available Sizes & Variants:

90 tablets Natrol L-Arginine - convenient daily dose for steady use.

Benefits & Features:

• Supports healthy blood flow by aiding nitric oxide production.
• May enhance exercise performance by improving oxygen delivery to muscles.
• Suitable for daily use as part of a balanced fitness routine.
• Quality manufacturing under GMP standards helps ensure batch consistency and safety.
• Star ingredient supports nitric oxide production, helping blood vessels widen and blood flow improve, which may help with oxygen delivery during workouts and daily activities, contributing to more consistent performance over time.

Natrol is a well established US supplement brand trusted for quality and reliability. The company is known for its amino acids and wellness formulas, with GMP manufacturing and third party testing to help ensure purity and potency. Natrol's products are widely available in national pharmacy chains, a sign of regulatory compliance and safety oversight. This L-Arginine formula focuses on delivering a straightforward vasodilation friendly dose in a daily tablet, making amino acid supplements approachable for everyday athletes.

Microcrystalline Cellulose, Hypromellose, Stearic Acid, Silicon Dioxide, Cellulose Gum, Magnesium Stearate, Methylcellulose, Dicalcium Phosphate, Glycerin

• GTIN: 47469052348
• Manufacturer: Natrol
• Categories: Arginine SupplementsBest SellersL-Arginine Supplements & TabletsNatrol Supplements & VitaminsNitric Oxide Boosters SupplementsSubscribe & Save 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.

Take 1 tablet of Natrol L-Arginine 3000mg daily, preferably with food to enhance absorption. Store in a cool, dry place away from direct sunlight. Keep out of reach of children. Consult a healthcare professional before use if you are pregnant, nursing, taking medication, or have a medical condition.

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

The Active Ingredient Is: L-Arginine

This Active Ingredient Is: L-Arginine is an amino acid and a fundamental building block used by the body. In this context, it is provided in a free-form, which supports the body's natural metabolic processes and serves as a precursor to nitric oxide.

As an amino acid, this ingredient is sourced as a single-component substance intended to support normal physiological function and vascular health through its role in nitric oxide production.

What Does L-Arginine Do?

L-Arginine contributes to the production of nitric oxide, which helps support normal blood flow and circulation. It is associated with maintaining healthy circulation and oxygen delivery to tissues in line with standard nutrition guidance.

These functions relate to the body's cardiovascular and muscular systems, supporting normal physiological processes involved in energy utilisation and vascular function.

This is consistent with regulatory guidance used for nutrient function claims in the UK and EU contexts.

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

Vitamin B6Pyridoxine Hydrochloride: 10 mg, Folate: 333 mcg DFE, Folic Acid: 200 mcg, Vitamin B12Cyanocobalamin: 50 mcg, L-Arginine: 3000 mg

Natrol has a long-standing reputation as a trusted US supplement maker, recognised for product quality, reliability and market longevity. Their focus on amino acids and wellness formulas aligns with our expectations for consistent potency and safety, reinforced by a strong retail presence and regulatory compliance in national outlets. This brand’s commitment to GMP and robust quality control underpins our confidence in both manufacturing excellence and product integrity. Our evaluation process emphasises brand credibility, manufacturing credibility, and third-party assurance, and Natrol consistently demonstrated a disciplined approach to quality while meeting industry standards. For deeper assurance, this diligence is reflected in our team’s review of Natrol as part of our team of medical experts and in alignment with our rigorous testing protocols.

Natrol L-Arginine is particularly well suited for this supplement due to its high-dose, single-ingredient formulation designed for vasodilation and circulatory support, which complements Natrol’s quality-centric manufacturing philosophy. This brand stood out in our selection process for its history of reliable supply, clear quality controls and consumer confidence, delivering value and reassurance for Welzo customers.