Doctor's Best L-Arginine - Sustained + Immediate Release, 500mg - 120 tablets

L-Arginine (as 500 mg immediate release and 500 mg sustained release from L-Arginine alpha-Keto-Glutarate), L-Arginine (as 500 mg immediate release and 500 mg sustained release from L-Arginine alpha-Keto-Glutarate)

United Kingdom & Rest of the World Shipping Details:
Same day dispatch for orders placed by 2pm (Orders after 2pm dispatched 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 14 days in the same original and unopened packaging. Subject to T&C's.

Welzo is a UK-based health platform. Orders ship from the UK.

Take 2 tablets daily without food, or as recommended by a nutritionally informed physician. Store in a cool, dry place. Warning: Consult your physician before using this product if you are pregnant, lactating, have a medical condition, are on prescription medications, or other supplements that may lower blood pressure while taking this product. Not for use by individuals under the age of 18 years. Keep out of reach of children.

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 (Amino Acid)

L-Arginine is essentially an essential amino acid your body uses to make nitric oxide, which helps keep normal blood flow and vessels healthy. This product gives you L-Arginine in both immediate-release and sustained-release forms to help ensure it stays available.

This formula is vegan and non-GMO, with the sustained-release part using L-Arginine Alpha-Ketoglutarate. Other ingredients help with delivery and stability of the active amino acid while keeping vegan, gluten-free, and soy-free make-up.

What Does L-Arginine Do?

L-Arginine helps with the production of nitric oxide, which can support normal blood flow and circulation as part of healthy cardiovascular function. Scientific research suggests this mechanism may be linked to lasting support for athletic activity and recovery in appropriate contexts, in line with NHS/EFSA guidance.

Dr. Böger from the University of Göttingen found that L-Arginine supplementation can influence endothelial function and vascular responses, aligning with the role of nitric oxide in normal circulatory processes.

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

Doctor's Best has shown its dedication to quality through a science-led nutrition approach that meets Welzo's standards for effective, well crafted supplements. This brand emphasises vegan, non-GMO formulations and free-from ingredients like gluten and soy, reflecting a thoughtful pick of ingredients that supports a clear product ethos. By combining instant-release with timed-release delivery in a single L-Arginine formula, Doctor's Best shows a science-led approach to formulation that meets Welzo's evidence-based criteria.

What stands out in our assessment is their clear emphasis on validated formulation controls and consistency in production. Their focus on tablet uniformity and formulation processes helps ensure reliable product performance and safety, a standard we recognise and value as part of our in-house quality checks, discussed with Welzo's healthcare professionals and reviewed in our quality framework at how we verify ingredient quality.

All in all, this brand’s science-led mindset, paired with its ingredient integrity and carefully applied production practices, gives us confidence to recommend Doctor's Best L-Arginine as a well suited option within Welzo's curated range.