NOW Sports Arginine & Ornithine 500 mg / 250 mg – Nitric Oxide Support, 100 Vegan Capsules

NOW Sports Arginine & Ornithine 500 mg / 250 mg is a sports nutrition amino acid supplement formulated for active adults, athletes, and fitness-focused users. Each 2-capsule serving provides 1 g of free-form L-Arginine and 500 mg of L-Ornithine from L-Ornithine HCl to support protein metabolism, nitric oxide promotion, and urea detox support.

Arginine and ornithine are complementary amino acids often used by athletes before exercise or at bedtime. Arginine supports proper elimination of urea from the body, while ornithine is synthesized from arginine and serves as a precursor to citrulline, proline, and glutamic acid. This vegan capsule formula is non-GMO, steroid tested, Informed Sport certified, kosher, and GMP Quality Assured.

Key Benefits

• Supports protein metabolism and active lifestyle nutrition
• Promotes nitric oxide support with free-form L-Arginine
• Provides L-Ornithine for urea detox pathway support
• Popular amino acid formula for athletes and active adults
• Vegan, non-GMO, steroid tested, and Informed Sport certified
• Made and quality tested in the USA with globally sourced ingredients

Dosage & Usage Instructions

Take 2 capsules daily as needed, preferably with juice or water on an empty stomach, before exercise, or at bedtime. For athletes, this product is commonly used before training to support nitric oxide promotion and amino acid metabolism, or before sleep as part of a recovery-focused routine.

• Exact Dosage: Take 2 capsules daily as needed.
• Best Time: On an empty stomach, before exercise, or at bedtime.
• Liquid: Take with juice or water.
• Food Guidance: Best taken away from heavy meals for amino acid absorption.
• Hydration Tip: Drink adequate water throughout the day, especially when training.
• Daily vs. Cyclic Use: May be used daily as needed; cycling is not required by the label.
• What to Expect: Supports protein metabolism, nitric oxide promotion, and urea detox pathway support.
• Storage: Store in a cool, dry, dark place after opening.
• Warnings: For adults only. Do not use if there is a history of myocardial infarction or established coronary artery disease.
• Precautions: Consult a physician if pregnant/nursing, taking medication, or have a medical condition, including herpes and/or glaucoma. Keep out of reach of children.

Ingredient-by-Ingredient Breakdown + Synergy

L-Arginine Free-Form: A conditionally essential amino acid used in sports nutrition for nitric oxide support and protein metabolism. The label states that arginine is required for proper elimination of urea from the body through a metabolic cycle that detoxifies nitrogen compounds.

L-Ornithine: An amino acid synthesized from arginine. The label states that ornithine is a precursor of citrulline, proline, and glutamic acid, making it complementary to arginine in amino acid metabolism.

Hypromellose: A plant-derived cellulose capsule material used to make the product suitable for vegan users.

Stearic Acid: A vegetable-source ingredient used as a manufacturing aid to support capsule consistency and production flow.

Formulation Synergy: NOW Sports Arginine & Ornithine combines two complementary amino acids in one convenient formula. Arginine supports nitric oxide promotion and urea elimination, while ornithine supports the urea cycle and acts as a precursor to other amino acids. Together, they are commonly used by athletes and active adults for protein metabolism, exercise support, and recovery-focused supplementation.

FAQ