Product Reviews
L-Arginine Supplements Review

Initial Posting: 8/25/17 Last Update: 8/14/18
L-Arginine Supplements Reviewed by

Choose the Best L-Arginine Supplement

Find Out Which L-Arginine Supplement Passed CL's Tests

Alphabetical list of L-arginine supplement brands compared in this review
Country Life L-Arginine Caps L-Arginine Sundown Naturals L-Arginine
Daily Wellness ArginMax - Women Purethentic Naturals Premium Arginine Swanson Super Strength L-Arginine
Elements of Health Care L-Arginine Plus - Grape Puritan's Pride L-Arginine The Vitamin Shoppe L-Arginine
GNC L-Arginine Rexall [Dollar General] L- Arginine Twinlab L-Arginine
Havasu Nutrition L-Arginine Extra Strength Solgar L-Arginine Vitacost L- Arginine HCl
MuscleTech L-Arginine SX-7 Black Onyx Spring Valley [Walmart] L- Arginine Vitamin World Maximum Strength L-Arginine
NOW L- Arginine    
Country Life L-Arginine Caps Daily Wellness ArginMax - Women Elements of Health Care L-Arginine Plus - Grape GNC L-Arginine Havasu Nutrition L-Arginine Extra Strength MuscleTech L-Arginine SX-7 Black Onyx NOW L- Arginine L-Arginine Purethentic Naturals Premium 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
Make sure the L-arginine supplement you take passed our test and is right for you!
Isn't your health worth it?
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, 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 member to get the full test results along with's findings, recommendations, and quality ratings. You'll get results for 18 L-arginine supplements: ten selected by and eight 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 review:
    • 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
    • Why the amino acid citrulline is often added to L-arginine supplements and whether it's been shown to help
    • Cautions, side effects, and drug interactions with L-arginine

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Learn More About L-Arginine Supplements Answers -- for L-Arginine Supplements Review
I have low blood pressure. Are there any supplements I should avoid? Get the answer >>

Is L-arginine helpful or harmful for people with cancer? Get the answer >>

Which supplements help with erectile dysfunction? Get the answer >>

Have any supplements been shown to increase women's libido? Get the answer >>

Does citrulline improve exercise performance or recovery? Get the answer >>
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