

"Very quick delivery. Used 3 times, each order arrived the next day before 12:00. Product quality is exactly as described."
"Reliable & original products, with fast next day delivery. Have been using Welzo for over a year now."
"Welzo is great, lots of support from customer service who are easy to get a hold of and quick delivery."
L-Arginine Complete Mixed Berry 10.5 oz (300 g) - Fenix Nutrition
L-Arginine Complete Mixed Berry drives nitric oxide production for improved blood flow, and it helps endurance and daily energy, and it’s made by Fenix Nutrition for reliable cardiovascular support.
Purchase options
Subscribe & save
Save 5%Fast delivery · Cancel anytime
- Easy Pause or Cancel
- Best Price Guarantee
- 60-Day Returns
- Priority Support
One-time purchase
Standard price, no subscription
Quantity
100% Money back guarantee, no questions asked
Secure Transaction
L-Arginine Complete Mixed Berry drives nitric oxide production for improved blood flow, and it helps endurance and daily energy, and it’s made by Fenix Nutrition for reliable cardiovascular support.
Available Sizes & Variants:
10.5 oz mixed berry powder - convenient daily serving for cardiovascular support.
Benefits & Features:
- Supports nitric oxide production for improved blood flow.
- L-Arginine helps support smooth blood flow during exercise and daily activity.
- L-Citrulline works alongside arginine to prolong NO production, which can help sustain energy through longer training sessions and support steady blood flow throughout the day.
- Vitamins C, D3, K2 and B complex support endothelial health and metabolic function.
- Beet powder adds natural colour and contributes to a pleasant berry flavour.
Fenix Nutrition proudly carries a longstanding lineage of levo arginine based formulations since 2010, emphasising quality and clinical ingredient selection. The product is produced in a GMP certified facility in the United States and uses a tasty mixed berry flavour with stevia. This arginine dietary supplement sits at the heart of a modern sports nutrition supplements range, designed to support blood flow, energy and overall cardiovascular health. The blend is purposely crafted to be easy to mix, quickly dissolving in water and making daily use simple.
- GTIN
- 890154002889
- Manufacturer
- Fenix Nutrition
- Best buy
- 6 to 24 months+
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.
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 takes part in everyday metabolic processes and acts as a starting point for nitric oxide production. It is provided here as a key supplement ingredient to support daily physiological function. This formula also has L-Citrulline and micronutrients that can help keep its activity going in the body, supporting NO production for cardiovascular upkeep.
What Does L-Arginine Do?
L-Arginine helps support nitric oxide production, which helps normal blood vessel relaxation and blood flow. This process supports cardiovascular function and overall circulation, lining up with how nutrients normally work. Together with L-Citrulline and micronutrients, it boosts the potential for lasting NO support.
*This product is not intended to diagnose, treat, cure, or prevent any disease.Fenix Nutrition stands out as our chosen partner for L-Arginine Complete Mixed Berry because of a well established track record in cardiovascular focused formulations and a clear commitment to top quality manufacturing. This brand differentiates itself from alternatives with a long-standing emphasis on L-Arginine and L-Citrulline blends since 2010, anchored by a philosophy of clinical ingredient selection and cardiovascular support.
What makes Fenix Nutrition stand out is its declared manufacturing discipline in a GMP-certified facility in the USA, backed by the company’s team of chemists, nutritionists and researchers who oversee product development. This pairing underpins consistent quality and reliability, aligning with Welzo’s expectations for ingredient quality and safety (how we verify ingredient quality). Our internal evaluation also considers their focus on sustainable formulation and positive customer outcomes within their product category, which resonates with the needs of this supplement.
Welzo selected Fenix Nutrition for this product because the brand’s cardiovascular formulation expertise fits perfectly with L-Arginine Complete Mixed Berry, and our expert team, including Welzo's healthcare professionals, endorses it for its robust manufacturing standards and credibility.
Part of the Welzo System™
Test, supplement, enhance, and move, all in one place.
Frequently Asked Questions
Everything you need to know about this product.





