NOW Foods Arginine & Ornithine delivers two key amino acids to support protein metabolism and energy production, helping you train harder and recover faster after demanding workouts. Arginine supports nitric oxide production for better blood flow during training. Ornithine aids the urea cycle and ammonia detoxification for faster metabolic recovery. Produced in GMP-certified facilities in the United States, it carries strict quality controls to ensure purity and potency you can trust.

Benefits & Features:

• Supports protein metabolism and energy production for training and daily activity.
• Arginine boosts nitric oxide production, improving blood flow during workouts.
• Ornithine aids the urea cycle, helping with ammonia detoxification and faster metabolic recovery.
• Free-form amino acids in this blend promote efficient absorption and utilisation when you need them most.
• Manufactured in GMP-certified facilities in the United States, NOW Foods maintains strict quality controls and tests every batch to guarantee potency you can rely on, with some athletes pairing it with l carnitine and acetyl l carnitine for broader support.

NOW Foods Arginine & Ornithine reflects the brand's long standing focus on purity and safety. Made in GMP-certified facilities in the United States, it is produced with allergen-conscious ingredients and tight quality checks to protect what matters most. This amino acid pair is trusted by athletes for supporting protein metabolism and energy during training, with free-form forms chosen for quicker absorption. Informed-Sport and Informed-Choice certifications back its reliability, and for broader routines some athletes also look at l carnitine and acetyl l carnitine.

L-Arginine (Free-Form), L-Ornithine (from L-ornithine HCl)

• GTIN: 733739000408
• Manufacturer: NOW Foods
• Size: 100 Capsules
• Categories: Arginine SupplementsNOW FoodsOrnithine 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 2 capsules daily as needed, preferably with juice or water on an empty stomach, before exercise or at bedtime. Store in a cool, dry, dark place after opening. For adults only. Do not use if you have a history of myocardial infarction or established coronary artery disease. Consult a physician if pregnant/nursing, taking medication, or have a medical condition (including herpes and/or glaucoma). 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

L-Arginine is an amino acid involved in everyday protein metabolism and energy production for active individuals.

This form is provided as a free-form amino acid for absorption, along with L-ornithine to support metabolic processes during exercise.

What Does L-Arginine Do?

L-Arginine helps to support nitric oxide production, which promotes vascular dilation and blood flow during physical activity. It also plays a role in energy metabolism and recovery in the context of intense training.

Scientific research suggests these functions contribute to normal exercise performance and metabolic responses. This information aligns with EFSA-endorsed understanding of amino acids in relation to normal vascular and energy processes.

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

NOW Foods is chosen for its science-led approach to supplement making, and its proven commitment to quality across every step of production. The brand’s GMP-certified facilities in the USA and the GMP Quality Assured standard show a tough framework for safety, purity and potency, helping consistent product integrity stay intact. Their commitment to top-tier testing and third-party verifications, including Informed-Sport and Informed-Choice, reinforces trust for athletes and active people alike. Additionally, NOW Foods champions transparency with non-GMO and Kosher certifications, while keeping allergen-conscious processing practices that minimise cross-contamination. This mix of credibility and precision is why NOW Foods stands out in a busy market. This brand sits well with UK market needs for highly controlled, premium ingredients in free-form amino acids, helping athletes and active people’ protein metabolism and recovery routines. Our partnership was reviewed by our team of medical experts for compliance with our quality assurance criteria, making sure a really thorough, consumer-focused selection process happens.