NOW
NOW Sports L-Arginine (454 g)
Pure free-form L-Arginine powder for amino acid support
Skip or cancel anytime
Get Notified When It's Back
Enter your email and we'll let you know the moment this item is restocked.
One-time notification only. No spam.
Why Choose This Product
PURE FORMULA
4.6g of free-form L-Arginine per serving — the most bioavailable form your body can actually use.
PREMIUM GRADE
NOW's pharmaceutical-grade amino acid powder meets the highest purity standards.
EASY MIXING
Fine powder dissolves completely in water or juice without gritty residue.
Is This Right For Me?
Answer 2 quick questions for a personalised answer
What's your main goal?
What's your biggest challenge right now?
How It Works
How It Works
L-Arginine is a conditionally essential amino acid that becomes critical during periods of stress, illness, or intense training. Your body uses it primarily in protein synthesis and nitrogen metabolism, converting it to nitric oxide when needed.
Who It's For
Athletes and fitness enthusiasts looking to supplement their amino acid intake. Adults who want to ensure adequate L-Arginine levels during periods of increased physical demands.
Who It's Not For
People with glaucoma, herpes simplex, or established coronary artery disease should avoid this supplement unless prescribed by a physician.
About This Product
What It Does
NOW L-Arginine delivers 4.6g of pure, free-form amino acid that your body recognizes and uses immediately. This conditionally essential amino acid becomes critical when your body's natural production can't keep up with increased demands from training, stress, or recovery.
Why It Works
- FREE-FORM ADVANTAGE: Unlike bound amino acids in food proteins, free-form L-Arginine requires no digestion and absorbs directly.
- CONDITIONALLY ESSENTIAL: Your body makes some L-Arginine, but production drops during physical stress when you need it most.
- PHARMACEUTICAL GRADE: NOW's rigorous testing ensures consistent purity and potency in every batch.
What's Inside
Pure L-Arginine powder with zero fillers, artificial ingredients, or common allergens. Contains no sugar, salt, wheat, gluten, corn, soy, milk, egg, shellfish or preservatives. NPN N/A.
Why we carry it: NOW's decades of amino acid expertise and third-party testing deliver the reliability serious athletes demand.
How to Take
Full Ingredients
| Supplement Facts | ||
| Servings Size: 2 Teaspoons (4.6 g) | ||
| Servings Per Container: 98 | ||
| Amount per Serving | % Daily Value | |
| L-Arginine (Free-Form) | 4.6 g | * |
| * Percent Daily Values are based on 2,000 calorie diet. | ||
| Daily Value not established. | ||
| Other Ingredients: None | ||
| Contains no: sugar, salt, starch, yeast, wheat, gluten, corn, soy, milk, egg, shellfish or preservatives. | ||
| Store in a cool, dry place. | ||
Customer Reviews
4 reviews
Questions & Answers
Research & Science
Explore the dropdown below to view peer-reviewed literature related to NOW Sports L-Arginine (454 g)
