Your Cart is Empty
But it doesn't have to be.
Continue Shopping.
Added to Cart
Combo Discount:
View/Edit Cart Checkout
Cart Total:
Customers Also Bought:

Now Foods, Sports, L-Arginine Powder, 1 lb (454 g)

By Now Foods

Our Price:
You Save:
$14.51 (36)
  • Volume Discount
  • Buy 4+
    Save 5%
Earn 10% Loyalty Credit ?

This product is already in your Wish List.

View Wish List

This product is now in your Wish List.

In Stock
  • Product Code: NOW-00210
  • UPC Code: 733739002105
  • Package Quantity: 1 lb (454 g)
  • Dimensions: 6.6 x 3.6 x 3.6 in, 1.2 lbs (0.54 kg)
Bundle Offer
Save $6.00 when you purchase these items today for only $28.43


Combo Discount:



- $6.00


Product Overview

  • 100% Pure - Free-Form
  • Pharmaceutical Grade
  • A Dietary Supplement
  • GMP-Quality Assured

NOW L-Arginine is Pharmaceutical Grade.

L-Arginine is a conditionally essential basic amino acid involved primarily in urea metabolism and excretion, as well as DNA synthesis.

Suggested Use

As a dietary supplement, take 2 level teaspoons (4.6 g) daily as needed in juice or water, preferably on an empty stomach. Consider taking these product other NOW products: L-Citrulline, P-5-P and AAKG.

Other Ingredients


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


This product is sold by weight not volume.

Store in a cool, dry place.

This supplement should be avoided by persons with glaucoma or herpes simplex unless otherwise prescribed by a physician. Do not use if you have had a myocardial infarction or have established coronary artery disease.

Visit Manufacturer's Website
Supplement Facts
Serving Size: 2 Level Teaspoons (4.6 g)
Servings Per Container: 98
  Amount Per Serving % Daily Value
L-Arginine (Free-Form) 4.6 g (4,600 mg) *
*Daily Value not established.

iHerb Customer Reviews

5 Stars
4 Stars
3 Stars
2 Stars
1 Stars

Does what it's suppose to do

Posted by Prevaileth on Dec 19, 2015

In terms of amino acids, I think they're all generally produced to the same standards, unlike say, some green foods which can be contaminated with environmental pollutants etc. I could be wrong though, but I guess we shouldn't be too worried about purity and efficacy as much when it comes to amino's since they're synthetically produced, as opposed to things grown naturally outdoors with varying uncontrollable factors. [<-- opinion] The product alleviates chest pains when working out [by it's N.O mechanism], along with a plethora of other supplements to help. But this one nailed it when the others no longer seemed to be as effective after consecutive days of workouts. For those giving this product a one star purely for the taste: this isn't a taste testing competition. Just because it tastes bad doesn't mean it's a bad product. A one star to me is a product that doesn't work at all, this one does. If I wanted to know the taste I'd ask a supplement connoisseur. I find a half a cup of cordial mixed with water with this helps mask the disgusting, thickening and sickening bitter taste. You need something really sweet to counteract and balance it out. A chaser of juice or something pleasant afterwards also gets rid of the aftertaste. Review 2: Taking double the recommended dose has boosted my mood quite considerably and given me clearer vision to boot. Also, some may be taking this to encourage GH production, in that case it should be taken on an empty stomach and with no sugar as sugar inhibits GH production [from my basic understanding], but I cannot simply muster up to the taste for this. Anecdotally, I find Ornithine before bed works well even with food and sugar, results being more defined muscles, better recovery, and clearer and more youthful looking skin.

Was this review helpful to you?

Very bad taste.

Posted by Gstucher on Dec 08, 2015

You need to have a steel mouth and wooden nose to drink that, but if you are able to drink it, you get a good pump (if pre-workout) or befor sleep for some growth hormone.

Was this review helpful to you?

Now Foods L-Arginine Powder

Posted by 5249851383593813803 on Oct 29, 2015

Its flavor is very bad

Was this review helpful to you?


Posted by 5714107490290597376 on Sep 02, 2015

excellent as 7 grams and 1.5 grams l citrulline daily to remove plaque from arteries and increase circulation.

Was this review helpful to you?

Tastes terrible but works great

Posted by 5536595171908109527 on Feb 21, 2015

Two tablespoonfuls of this stuff into juice or milk has helped lowered my dad's high blood pressure. But he says it tastes godawful. Will order a different version for him next time, the fruit flavored one

Was this review helpful to you?

See All Reviews