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L-Arginine Supplements Reviewed by ConsumerLab.comProduct Review:
Review of L-Arginine Supplements

Which L-Arginine Supplements Are Best?

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Brands compared in report

Daily Wellness ArginMax - Women
Elements of Health Care L-Arginine Plus - Grape
Havasu Nutrition L-Arginine Extra Strength
MuscleTech L-Arginine SX-7 Black Onyx
NOW L- Arginine
PipingRock.com L-Arginine
Purethentic Naturals Premium Arginine
Puritan's Pride L-Arginine
Rexall [Dollar General] L- Arginine
Solgar L-Arginine
Spring Valley [Walmart] L- Arginine
Sundown Naturals L-Arginine
Swanson Super Strength L-Arginine
The Vitamin Shoppe L-Arginine
Twinlab L-Arginine
Vitacost L- Arginine HCl
Vitamin World Maximum Strength L-Arginine

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More about this report

L-arginine (also referred to as just arginine) is an amino acid that may increase blood flow and is promoted for improving symptoms of certain cardiovascular diseases, as well as for improving exercise and sports performance, and sexual function. But does arginine really help with all of these conditions? And, if it does help, which arginine supplements are best?
 
To answer these questions, ConsumerLab.com carefully reviewed the clinical evidence, and purchased, tested, and compared popular arginine supplements. We found one product contained less L-arginine than claimed on the label. Among those that contained what they claimed, we identified those that provide the best value — making them our Top Picks.
 
We found the quality of products to be generally high. However, the suggested dosage of L-arginine for some products may not be effective for their expected use. We also found the cost of L-arginine varied among products, with some offering better value than others.
 
You must be a ConsumerLab.com member to get the full test results along with ConsumerLab.com's findings, recommendations, and quality ratings. You'll get results for 16 L-arginine supplements: nine selected by ConsumerLab.com and six that passed the same testing in our voluntary Quality Certification Program. There's also information about one product that is similar to one which passed testing but is sold under a different brand name.

You'll get the following information about L-arginine supplements in this comprehensive report:
    • Which L-arginine supplements passed or failed testing
    • Which L-arginine supplements are the best value and CL's Top Picks
    • What L-arginine can and cannot do for your health
    • How forms of L-arginine ("free form," L-arginine HCl, and L-arginine-alpha-ketoglutarate) differ from one another
    • The dose of L-arginine for specific uses
    • What to look for on product labels and how to take L-arginine supplements
    • Cautions, side effects, and drug interactions with L-arginine

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