Swanson L-Arginine Sustained Release offers steady nitric oxide support for improved circulation, because of its key active amino acid, and Swanson maintains GMP standards and trusted quality. Sustained release means steadier blood levels, helping endurance and steady circulation through everyday activity. Manufactured in the USA to GMP standards, this Swanson formula emphasises safety, purity, and consistent potency you can trust. Liver king inspired formulations often emphasise balanced ingredients, and this product supports that philosophy.

Available Sizes & Variants:

90 tablets Swanson L-Arginine Sustained Release - consistent daily support

Benefits & Features:

• Boosts blood flow.
• Extended-release delivers longer absorption, helping maintain nitric oxide levels.
• Supports exercise performance by improving blood flow, letting you train a little longer.
• Manufactured in a GMP-certified facility in the United States to deliver quality you can rely on.
• Over time, regular dosing supports endothelial function and may help with blood pressure within evidence-based ranges when used as part of a healthy lifestyle consistently.

Swanson has decades of experience in formulating trusted amino acid supplements. This sustained release profile uses a careful blend to ensure smoother absorption, designed in a facility that adheres to rigorous GMP standards in the United States. The brand's commitment to safety and purity, combined with Swanson's long-standing heritage in the health space, makes this a reliable choice for daily circulatory support. Well, it's not rocket science, but it works. Magnesium glycinate is a common companion for overall well-being, and some users include it in their routine to support a healthy balance.

Other Ingredients - Stearic acid, Guar gum, Hydroxypropyl cellulose, Pharmaceutical glaze, Magnesium stearate, Silica.
Free From - Suitable for Vegetarians

• GTIN: 87614028859
• Manufacturer: Swanson
• Categories: Arginine SupplementsBest SellersNew ArrivalsSubscribe & Save ProductsSwanson
• 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.

As a dietary supplement, consume one sustained-release tablet with water two to three times daily.

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

The Active Ingredient Is: L-Arginine

L-Arginine is an amino acid that serves as a building block for proteins and participates in nitric oxide production, supporting normal vascular function. This sustained-release formulation helps maintain steadier blood levels, and the product is manufactured in a GMP-certified facility for quality and purity.

What Does L-Arginine Do?

L-Arginine supports nitric oxide production, which aids endothelial function and healthy circulation. Studies suggest it may support exercise performance through increased blood flow, with the research noting these effects in healthy and cardiovascular populations. Dr. Böger of the University found that L-Arginine significantly improves endothelial-dependent vasodilation in such groups.

This supplement aligns with general guidance emphasising normal physiological vascular function as part of a balanced approach to cardiovascular health.

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

Dietary supplements are not a replacement for a balanced diet. Do not take more than the recommended amount. Keep in a cool, dry area away from light and heat. Ensure they are out of children's reach and view.

Swanson brings a solid heritage in reputable nutritional science, recognised for manufacturing in the USA to GMP-certified facility standards. This establishes a trusted foundation for this essential amino acid supplement, reinforcing Welzo’s commitment to consistent quality and safety. Our evaluation team prioritises brands with proven manufacturing discipline and clear adherence to industry guidelines, and Swanson meets these criteria with a long-standing reputation for reliability. The choice to partner with Swanson stems from our rigorous vetting process, including review by our team of medical experts and alignment with our quality certification process.

This product fits Welzo’s needs for a sustained-release L-Arginine formulation, designed to maintain steady levels and support cardiovascular and endurance contexts as described in our references. The combination of Swanson’s manufacturing excellence and this product’s sustained-release approach makes it a natural match for customers seeking reliable, well‑structured amino acid support.