Weider L-Arginine Caps is a nitric oxide friendly supplement that helps boost blood flow and support muscular performance, and enhance the pump during workouts. This product is designed for athletes and helps you push harder, recover quicker, which is what the brand has stood for for decades.

Available Sizes & Variants:

100 capsules – convenient daily dose for training weeks.

Benefits & Features:

• Supports nitric oxide production for better blood flow.
• Enhances workout performance and helps you feel more pumped.
• Regular use supports vasodilation, helping deliver oxygen and nutrients to muscles during training for a steadier pace, sustainable effort, and better overall performance across sessions.
• Intended for daily use and easy to fit into pre-workout routines.
• With decades in the sports nutrition space, Weider has built trusted formulations that focus on real results for athletes who demand reliability and consistency from their supplements.

Weider L-Arginine Caps feature L-Arginine hydrochloride as the star active ingredient. L-Arginine is linked with nitric oxide production, supporting vasodilation and better blood flow during exercise. The brand’s decades in the sports nutrition space underline its commitment to reliable formulations. Athletes trust Weider for quality, consistency, and results. Useful alongside a protein powder for muscle gain.

Energy, Protein, Carbohydrates, Fat, L-Arginine, Energy, Protein, Carbohydrates, Fat, L-Arginine

• GTIN: 4044782323816
• Manufacturer: Weider
• Categories: ArginineL-ArginineNitric Oxide BoostersWeider Sports Nutrition Supplements
• 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 5 capsules before workout. On non-training days, take 5 capsules before breakfast. Store in a cool, dry place. Warning: May contain traces of lactose, gluten, soy, and egg albumen. Dietary supplements should not be used as a substitute for a varied diet. Keep out of reach of small 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 (Hydrochloride Form)

L-Arginine is an amino acid that contributes to normal bodily functions and is commonly used in supplement form as its hydrochloride salt. This form provides a stable, highly bioavailable source of L-Arginine for daily use in athletic contexts.

The compound is supplied as the hydrochloride salt, a common presentation for amino acid supplements, and is a primary component intended to support nitric oxide production and blood flow related to physical activity.

What Does L-Arginine (Hydrochloride Form) Do?

L-Arginine is involved in the body's production of nitric oxide, which can contribute to enhanced blood flow and circulation during exercise. Scientific research suggests improvements in exercise tolerance and perceptions of muscle pump in resistance-trained individuals, with the potential for greater nitric oxide availability.

Dr. Collins of the University of California found that L-Arginine supplementation can support nitric oxide production and vascular responses in active individuals, aligning with EFSA-endorsed roles for amino acids in normal metabolism.

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

Weider is a brand we recognise for a long-standing footprint in sports nutrition, known for steady, quality-focused formulas that back athletic performance. This heritage gives us trust in a partner with deep market experience and a clear focus on product reliability. Our medical team assessed Weider’s reputation for quality and durability in the endurance and performance space, while our process for ingredient oversight is backed by how we verify ingredient quality.

We specifically looked for a supplier with a robust approach to formulation and batch-to-batch consistency, paired with a portfolio that matches mainstream sport nutrition needs. This brand meets our criteria for credible sourcing practices and a clear commitment to efficacy within the guidelines of nitric oxide support. Weider L-Arginine Caps are a natural fit for this category, aligning with our shown emphasis on verified quality, safety, and suitability for the British market.