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Doctor's Best, L-Arginine Powder, 10.6 oz (300 g)


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Doctor's Best, L-Arginine Powder, 10.6 oz (300 g)

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Doctor's Best, L-Arginine Powder, 10.6 oz (300 g)

In Stock
  • Expiration Date: 04/2020
  • Shipping Weight:
    0.95 lbs
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  • Product Code: DRB-00374
  • UPC Code: 753950003743
  • Package Quantity: 10.6 oz
  • Dimensions:
    3.6 x 3.6 x 4.5 in, 0.8 lbs
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Product Overview


  • Science-Based Nutrition
  • Dietary Supplement
  • Helps Boost Nitric Oxide
  • Helps Support Athletic Endurance
  • Vegan
  • Non-GMO / Gluten Free

L-Arginine is an amino acid that has been shown to support the cardiovascular system, promote vigorous heart function and enhance healthy circulation throughout the body.  It is required to synthesize Nitric Oxide (NO) in the human body.

Research suggests L-Arginine supplementation may also have positive benefits on athletic performance through muscle protein synthesis.

  • Helps boost Nitric Oxide
  • Helps support athletic endurance

Suggested Use

Take 1 scoop daily with or without food, or as recommended by a nutritionally-informed physician.

Other Ingredients



Caution: For adults only. Consult physician if pregnant/ nursing, taking medication, or have a medical condition. Do not use if you have a myocardial infarction or have established coronary artery disease.  Keep out of reach of children.

 Store in a cool dry place.

Supplement Facts
Serving Size: 1 scoop (6 grams)
Servings Per Container: 50 servings
  Amount Per Serving % Daily Value
L-Arginine HCl  6 g
†Daily Value not established.
iHerb Customer Reviews


Posted by iHerb Customer on Dec 04, 2017 | Verified Purchase

Good Good Good Good Good Good

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Posted by iHerb Customer on Dec 02, 2017 | Verified Purchase

Tastes bad but does the trick!

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Posted by iHerb Customer on Aug 09, 2017 | Verified Purchase

Great product, fast shipping, I recommend shop

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Use this for nitric oxide 9 gr. A day, very good

Posted by iHerb Customer on May 16, 2017 | Verified Purchase

I use this with L-Citrulline to make nitric oxide in your body,and the things you feel and notice is good,so the things you can't feel and notice must also be good.

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High quality

Posted by iHerb Customer on May 03, 2017 | Verified Purchase

I first bought 1 pound of NOW brand L-Arginine. It had a terribly foul chemical taste to it. It didn't seem right for me to take it. So I immediately bought Doctor's Best powder L-Arginine and tasted them side by side. What a difference. The Doctor's Best brand tasted SO much better in comparison. And it was a finer powder that dissolves better. The NOW brand is grainier. Big difference between the two. Buy both and see for yourself. I threw the NOW brand L-Arginine out.

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