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Now® Sports Arginine & Citrulline

Now® Sports Arginine & Citrulline
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Now® Sports Arginine & Citrulline

120 Capsules


Price: $24.99

Member Price: $19.99 Become a Member

sale$3.99 Flat Rate Shipping! Details

AVAILABILITY: In stock, Ships in 1-2 full bus. days. Details


Supports Protein Metabolism
Helps Maintain Muscle Tissue*

Arginine & Citrulline are two amino acids that are integral to protein metabolism and utilization, as well as to the maintenance of muscle tissue.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Supplement Facts
Serving Size   2 Capsules
Servings Per Container  60
Amount Per Serving   % DV
L-Arginine (Free-Form)    1.00 g   ** 
L-Citrulline (Free-Form)    500.00 mg   ** 
 ** Daily Value (DV) not established

Other Ingredients:  Gelatin (capsule), Silica, Cellulose, Stearic Acid (Vegetable Source), Magnesium Stearate (Vegetable Source)

Contains no sugar, salt, starch, yeast, wheat, gluten, corn, soy,milk, egg, shellfish or preservatives.


Do Not Eat Freshness Packet. Keep in Bottle.

Health Notes


  • Reliable and relatively consistent scientific data showing a substantial health benefit.
  • Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
  • For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support.

Our proprietary "Star-Rating" system was developed to help you easily understand the amount of scientific support behind each supplement in relation to a specific health condition. While there is no way to predict whether a vitamin, mineral, or herb will successfully treat or prevent associated health conditions, our unique ratings tell you how well these supplements are understood by the medical community, and whether studies have found them to be effective for other people.

For over a decade, our team has combed through thousands of research articles published in reputable journals. To help you make educated decisions, and to better understand controversial or confusing supplements, our medical experts have digested the science into these three easy-to-follow ratings. We hope this provides you with a helpful resource to make informed decisions towards your health and well-being.

This supplement has been used in connection with the following health conditions:

Used for AmountWhy
2 to 3 grams three times per day2 stars[2 stars]
In one study, taking arginine improved the ability of angina sufferers to exercise. Detailed studies have proven that arginine works by stimulating blood vessel dilation.
Congestive Heart Failure
5.6 to 15 grams per day with a doctor's supervision 2 stars[2 stars]
The body needs arginine to make nitric oxide, which increases blood flow. This process is impaired in people with CHF. It also has been shown to improve kidney function in people with CHF.
Erectile Dysfunction
1,670 to 2,800 mg daily2 stars[2 stars]
Blood vessels need arginine to dilate and form an erection. Supplementing with arginine has been shown to help men with erectile dysfunction in some studies.
HIV and AIDS Support and Preservation of Lean Body Mass

(Glutamine, HMB)
1.5 grams of HMB, 7 grams of L-glutamine, and 7 grams of L-arginine twice per day2 stars[2 stars]
The combination of glutamine, arginine, and HMB may prevent loss of lean body mass in people with AIDS-associated wasting.
Male Infertility
4 grams daily2 stars[2 stars]
The amino acid arginine is needed to produce sperm. Research shows that several months of L-arginine supplementation increases sperm count, quality, and fertility.
Pre- and Post-Surgery Health
12.5 to 18.75 grams daily before and after surgery2 stars[2 stars]
The amino acid arginine has a role in immune function, infection prevention, and tissue repair after injury, including surgery.
Sickle Cell Anemia and Pulmonary Hypertension
100 mg per 2.2 lbs (1 kg) of body weight, three times per dayas L-Arginine2 stars[2 stars]
People with pulmonary hypertension (a life-threatening complication of sickle cell anemia) who received L-arginine had significant improvement in one study.
Athletic Performance and Body Composition and Strength
Refer to label instructions 1 star[1 star]
At very high intakes, the amino acid arginine has increased growth hormone levels, which stimulate muscle growth. Trials combining weight training with arginine and ornithine showed decreases in body fat and increases in total strength and lean body mass.
Female Infertility and In Vitro Fertilization
Refer to label instructions 1 star[1 star]
Supplementing with L-arginine has been shown to improve fertility in women with a history of failed attempts at in vitro fertilization.
Refer to label instructions 1 star[1 star]
The amino acid arginine may both protect the stomach and increase its blood flow.
Refer to label instructions 1 star[1 star]
The amino acid arginine is needed by the body to make nitric oxide, a substance that allows blood vessels to dilate, thus reducing blood pressure. Arginine given orally and intravenously has been reported to help reduce blood pressure.
Wound Healing
Refer to label instructions 1 star[1 star]
Arginine appears to improve wound healing by increasing protein synthesis.

The amino acid arginine has several roles in the body, such as assisting in wound healing, helping remove excess ammonia from the body, stimulating immune function, and promoting secretion of several hormones, including glucagon, insulin, and growth hormone.

Copyright 2014 Aisle7. All rights reserved.

The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2015.

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Ratings and Reviews


by PowerReviews
NOW NUTRITIONNow® Sports Arginine & Citrulline

(based on 3 reviews)


of respondents would recommend this to a friend.

Reviewed by 3 customers

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(2 of 2 customers found this review helpful)


Tremendous supplement

By revfgo

from Daphne, AL

About Me Weekend Warrior

See all my reviews

Verified Buyer


  • Easy To Take
  • Good Value
  • Helps With Fatigue


    Best Uses

    • Daily Use

    Comments about NOW NUTRITION Now® Sports Arginine & Citrulline:

    I use this supplement to assist in the reduction of my blood pressure.

    (1 of 2 customers found this review helpful)


    Now Sports arginine & citrulline

    By williamgraham1

    from St Simons Island, GA

    About Me Homeowners chores, Walker

    See all my reviews

    Verified Buyer


    • Easy To Take
    • Good Value
    • Improves sex
    • Reduces blood pressure


      Best Uses

      • Daily Use

      Comments about NOW NUTRITION Now® Sports Arginine & Citrulline:

      purchased because research indicated that arginine and citrulline improve nitric oxide production which is necessary for good sexual performance - similar to viagra.

      (7 of 10 customers found this review helpful)


      Good But Not Enough

      By pharsumabo

      from Los Angeles, California

      See all my reviews

      Comments about NOW NUTRITION Now® Sports Arginine & Citrulline:

      Nobel Prize winner Dr. Louis Ignarro who pioneered using these amino acids to boost NO and obtain helpful blood vessel effects recommends 4 to 6 grams of L-arginine daily, at bedtime. This is 4000 mg a day, so you would need to take 8 of these pills a day.

      Displaying reviews 1-3

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