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10 Best L-Arginine Supplements

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– 100 Capsules

$10.99 $5.95
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Buy L-Arginine
– 250 Capsules

$21.99 $10.95
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– 120 Tablets

$23.99 $12.95
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    L-Arginine, also known simply as arginine, is considered a semi-essential amino acid necessary for a number of bodily functions. Although the body is generally able to produce adequate amounts of arginine, supplementation is often recommended for individuals such as bodybuilders and athletes. L-Arginine is often used by athletes to increase oxygen delivery and blood flow during exercise due to its unique ability to increase nitric oxide and vascular regulation.[1] NOW L-Arginine offers a premium source of pure, ultra-concentrated L-Arginine HCl in fast-absorbing vegetarian capsules that deliver maximum exercise-enhancing results!

    One of the main effects of arginine is that it causes vasodilation, or an increase in the diameter of blood vessels. It is converted to nitric oxide in the body, which increases the flow and blood and oxygen to the muscles during bouts of intense exercise, enhancing aerobic exercise capacity.[2] Supplementing with NOW L-Arginine reduces the oxygen capacity of low-intensity exercise, increases tolerance to high-intensity exercise[3], and quickly removes accumulation of lactate and ammonia.[4]

    NOW L-Arginine can be taken anytime of day to improve exercise capacity, reduce recovery time[5], and strengthen immunity.[6] Arginine can also act as a natural precursor to creatine and stimulates an increase in the production of growth hormone. The benefits of arginine supplementation are many and far reaching, and NOW L-Arginine makes it easy and convenient to experience these for yourself!

    Each bottle of NOW L-Arginine comes with an incredible 120 tablets for long-lasting arginine and vasodilatory support when you need it most.


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    NOW L-Arginine Supplement Facts


    NOW L-Arginine delivers 1,000mg capsules of this conditionally essential amino acid that supports incredible muscle pumps and vascularity. L-Arginine HCl helps to increase the body’s ability to consume and utilize oxygen due to its ability to increase vasodilation.


    As a dietary supplement, take 1 tablet 1 to 3 times daily as needed. Take between meals or at bedtime with a carbohydrate drink to facilitate absorption.


    For adults only. Speak with a doctor before use if you are pregnant or nursing, taking medication, or have a medical condition. Do not use if you have had a myocardial infarction or have established coronary artery disease. Keep out of reach of children.

    Featured Ingredients

    L-Arginine HCl – Arginine is an amino acid that plays a key role in two regulatory cycles (urea and nitric oxide) and can be converted to bioactive molecules such as creatine and agmatine. It is one of the most versatile amino acids in the body, supporting improved blood flow, faster recovery, stronger immunity, and better performance. L-Arginine HCl provides superior absorption to promote incredibly strong muscle pumps, intense vascularity, and endurance that won’t quit until the workouts over.

    Q. How Should I Use L-Arginine for Best Results?

    A. Due to L-Arginine’s ability to increase nitric oxide production, it is recommended that you consume 1-3 grams of arginine one hour prior to working out in order to boost NO production and reduce metabolic fatigue. It should be taken on an empty stomach for best absorption.

    Q. Is it Safe to Supplement with Arginine HCl?

    A. It is accepted that supplementing with Arginine is safe when consumed in amounts between 1-6 grams per day for no longer than 60 continuous days at a time. It is well tolerated by most people. Possible mild side effects may include stomach discomfort, nausea, or stomach cramps.

    Q. Can I Take Other Supplements While Taking NOW L-Arginine?

    A. Definitely! NOW L-Arginine is extremely effective as a stand alone product, or as part of your favorite supplement stack. Combine with a caffeinated pre-workout for an intense and explosive burst of energy and power. Or mix with a protein shake post-workout for improved recovery.

    Q. Does NOW L-Arginine Contain Any Allergens?

    A. NOW L-Arginine is not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, or tree nut ingredients. It is produced in a GMP facility that processes other ingredients containing these allergens. It is packed in vegetable capsules and therefore is vegetarian friendly.

    Sorry, we're out of stock

    Check out our Ten Best list:

    10 Best L-Arginine Supplements

    Buy L-Arginine
    – 100 Capsules

    Out of Stock



    Buy L-Arginine
    – 250 Capsules

    Out of Stock



    Buy L-Arginine
    – 120 Tablets

    Out of Stock



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