NOW Foods L-Arginine powder helps nitric oxide production for improved blood flow and vascular health, bringing a pure and flexible supplement you can dose to suit you. NOW Foods has over five decades of experience delivering quality, clean label supplements you can rely on.

Available Sizes & Variants:

454 grams L-Arginine powder — Pure, flexible dosing for tailored intake.

Benefits & Features:

• Pure, simple L-Arginine supports nitric oxide production.
• Non-GMO vegan powder blends easily into shakes or water daily.
• Free form L-Arginine is the key active ingredient, providing flexible dosing that fits into your routine; it's free from additives, colours, or preservatives for clean daily use.
• Created by NOW Foods, a brand with over five decades of experience, you get trusted quality control and transparent labeling you can rely on.
• Ideal for daily routines, it can be easily mixed into drinks, helping you stay consistent alongside l carnitine and acetyl l carnitine stacks.

NOW Foods has built a reputation on purity and reliability for over five decades, and this L-Arginine powder is no exception. The product is manufactured in a GMP-certified facility, is non-GMO, vegan, and allergen friendly, with no additives, colours, or preservatives. Each serving delivers 6 grams of free-form L-Arginine, making it easy to tailor dosing. The brand is known for transparent labeling and ethical sourcing, helping you shop with confidence when building healthy, long-term routines. Some users pair it with n acetylcysteine for antioxidant support, and some athletes use it alongside the best protein powder for muscle gain.

L-Arginine (Free-Form)

• GTIN: 733739002105
• Manufacturer: NOW Foods
• Categories: Arginine SupplementsL-Arginine Supplements & TabletsNitric Oxide Boosters SupplementsNOW Foods
• 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.

Mix 2 level teaspoons (approximately 6 g) daily in at least 8 oz. of juice or water, preferably on an empty stomach. Store in a cool, dry, dark place after opening. For adults only. Not for pregnant or nursing women. Consult a physician if taking medication (especially antihypertensives, anticoagulants, and antidiabetic drugs), have a medical condition (especially asthma or renal disease), or are planning to have surgery. This product should be avoided by persons with glaucoma or herpes simplex unless otherwise prescribed by a physician. Do not use if you have had a myocardial infarction or have established coronary artery disease. 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 (Free-form)

L-Arginine is basically an amino acid that acts as a precursor to nitric oxide, a signalling molecule involved in everyday vascular function.

This powder form gives pure free-form L-Arginine with vegan and allergen-free characteristics, handy for flexible dosing and clean-label purity.

What Does L-Arginine Do?

L-Arginine plays a part in nitric oxide production, which supports normal blood vessel function and circulation as part of everyday physiology. It is also involved in protein metabolism and cellular growth processes as part of a healthy nitrogen balance.

EFSA and NHS guidance recognise the importance of these normal physiological roles in supporting cardiovascular and metabolic health via adequate amino acid availability and metabolism.

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

NOW Foods delivers a science-led approach to supplements that aligns with Welzo’s commitment to rigorous quality and openness. This brand has a long-standing track record of delivering value-led formulations, built on five decades of know-how in the natural products space. NOW Foods is well-known for rigorous quality control and transparent product labeling, that backs our confidence in this supplier as a reliable partner for L-Arginine powder.

The product quality shines through with pharmaceutical-grade L-Arginine, a pure, single-ingredient formulation that is non-GMO, vegan/vegetarian, and allergen-friendly. GMP-certified manufacturing and extensive third-party auditing support its reliability, while ethical sourcing and broad certification badges (vegan, kosher, halal) reinforce trust in its origin and purity. This focus on purity and compliance is why we selected NOW Foods over other brands for this supplement.

For you, this means a straightforward, well-regulated option that matches our desire for clean-label reliability. This brand was evaluated by our expert team of doctors, nurses, and nutritionists and is supported by how we verify ingredient quality, ensuring you receive a durable foundation for personalised dosing and safe usage.