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Top-Rated Products
NSI L-Arginine & L-Ornithine -- 2,000 mg - 300 Capsules (30)
NSI L-Arginine -- 1,800 mg - 200 Capsules (52)
NSI L-Arginine -- 1,800 mg - 300 Capsules (6)
Reviews Home >  Supplements >  Amino Acids >  L-Arginine
Top Rated Product
NSI L-Arginine -- 1,800 mg - 200 Capsules

NSI L-Arginine -- 1,800 mg - 200 Capsules

Promotes healthy circulation! Stimulates release of human growth hormone (HGH). How Does NSI® L-Arginine Work? L-arginine is an amino acid that plays an important part in the body's production of nitric oxide. Nitric oxide promotes vasodilation (relaxation of blood vessels), helping to maintain healthy blood flow throughout the body. Because of this effect, l-arginine is considered useful for concerns that improve with enhanced circulation, including men's sexual health. NSI® L-Arginine is better because it:. Contains a high potency dose of 1,800 mg of l-arginine per 2 capsule serving. Did You Know? All NSI supplements are packaged in HDPE (High Density Polyethylene) bottles. These bottles keep moisture vapor out, protecting the freshness and integrity of their contents, and are 400% more effective compared other brands currently using PET (Polyethylene Terephthalate) bottles. HDPE bottles do not break as glass can and are also recyclable so we urge you to please recycle them.

Average Customer Rating: 4.442 out of 5 4.4 out of 5
48 of 52 (92%) customers would recommend this product to a friend.
Product Details

Customer Reviews for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
miracle product, May 28, 2009
By tolnay64 from indiana
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"i could not live without it anymore.
i use it for circulation, energy, highblood presure, cramping and many more."

Age: 45-54
Gender: Female
Daily supplement usage: 3-5 supplements daily
Referral source: Family Member
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 2 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
Excellent, May 11, 2009
By ughlion from Belgium
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"This product actually lowers the blood-pressure, causes hair to grow back, and enlargement of the muscles (a physical-activity is however required ...).
I take 1 capsule each day."

Age: 55-64
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Enhanced performance
Duration of use: Over 180 days
1 of 1 people found this review helpful.
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Review 3 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
Better than expected, March 31, 2009
By Robtsd from San Diego
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I take 2 a day with one pill of Pycnogenol 100mg and will blow you away in what you will see. It started to work in about 2 weeks."

Age: 55-64
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Enhanced performance
Duration of use: Less than 30 days
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Review 4 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
Really makes a difference, January 11, 2009
By LowLow from Bethany OK
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I have been taking this product in conjunction with citrillen for over a year now. I have noticed a increase in endurance and overall wellness"

Age: 35-44
Gender: Male
Daily supplement usage: 3-5 supplements daily
Referral source: Self-referred
Reason for usage: Promote overall health
Duration of use: Over 180 days
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Review 5 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
Makes a difference, December 21, 2008
By Geek from Wisconsin USA
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"This stuff does help with circulation and men's health. I have found 2 capsules a day gives me good results."

Age: 45-54
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Friend
Reason for usage: Specific health concern
Duration of use: Over 180 days
1 of 1 people found this review helpful.
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Review 6 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Top 500 Contributor Top 500 Contributor
Overall Rating: 4 out of 5 4 out of 5
First times a charm, December 6, 2008
By iffie0609 from Banning, CA
Value: 4 out of 5 4 out of 5
Quality: 4 out of 5 4 out of 5
Effectiveness: 4 out of 5 4 out of 5
Satisfaction: 4 out of 5 4 out of 5

"The first time that I've taken Arginine as a solo supplement, have taken Orthinine & Arginine. This stuff works, get your blood flow right. Would recommend for 40+ men."

Age: 45-54
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Promote overall health
Duration of use: Less than 30 days
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Review 7 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
L-Arginine, November 30, 2008
By Blove from Phoenix,AZ
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I have been using over the last month and I feel it is a quality product.
Results are very good ."

Age: 45-54
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Enhanced performance
Duration of use: 30-60 days
2 of 2 people found this review helpful.
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Review 8 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
Great Product!, October 28, 2008
By bluzman58 from Gwinn, Michigan
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 4 out of 5 4 out of 5
Satisfaction: 5 out of 5 5 out of 5

"Very clean, pure supplement. Easily assimilated and does what it is supposed to do. I would highly recommend this to anyone wanting l-Arginine"

Age: 45-54
Gender: Male
Daily supplement usage: 3-5 supplements daily
Referral source: Other
Reason for usage: Promote overall health
Duration of use: 30-60 days
0 of 1 people found this review helpful.
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Review 9 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 4 out of 5 4 out of 5
Pretty good..., October 16, 2008
By goldenC from Asheville, NC
Value: 4 out of 5 4 out of 5
Quality: 3 out of 5 3 out of 5
Effectiveness: 3 out of 5 3 out of 5
Satisfaction: 3 out of 5 3 out of 5

"Still experimenting with this...seems good, but not sure if it's causing an acidosis environment. Well, re-post when I narrow it down."

Age: 45-54
Gender: Female
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Promote overall health
Duration of use: Less than 30 days
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Review 10 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
Arginine at is best., October 2, 2008
By stavsig from Sunrise, FL
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"Great quality product that delivers on all the promises of Arginine. Recommend to all men over 40."

Age: 45-54
Gender: Male
Daily supplement usage: 3-5 supplements daily
Referral source: Self-referred
Reason for usage: Enhanced performance
Duration of use: 30-60 days
0 of 1 people found this review helpful.
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Review 11 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 4 out of 5 4 out of 5
Great product......., September 2, 2008
By dave35 from NJ
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"Great product and price. I only use one or two a day. However I see a big difference in my vascularity when I work out and it also helps to keep my libido quite strong. Sometimes I take this along with NSI brand tribulus and or maca. It has not failed me yet and I have been a loyal customer for years and will continue to buy NSI brand of all my supplements."

Age: 35-44
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Enhanced performance
Duration of use: 30-60 days
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Review 12 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 1 out of 5 1 out of 5
L-arginine, May 14, 2008
By Tutela from Gainesville, FL
Value: 1 out of 5 1 out of 5
Quality: 1 out of 5 1 out of 5
Effectiveness: 1 out of 5 1 out of 5
Satisfaction: 1 out of 5 1 out of 5

"I tried l-arginine for its vasodilatory effects (l-arginine is converted into nitric oxide, which is a vasodilator) in attempt to improve my workouts. However I learned in school that amino acids like l-glutamine, l-arginine, might not even make it past the gastric acid in the stomach where it is degraded. I wouldn't buy this product again as I would rather spend money on healthy food in which I know I am ingesting nutrients that are bioavaible to my body.
However, I am always a fan of the placebo effect..."

Age: 25-34
Gender: Male
Daily supplement usage: 1-2 supplements daily
Referral source: Other
Reason for usage: Enhanced performance
Duration of use: 61-180 days
0 of 3 people found this review helpful.
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Review 13 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
Great product, April 7, 2008
By BodyWise from Chicago, IL
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 4 out of 5 4 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I have been using this product for little over a month now. My dosage was 2 capsules 3 times a day. It increased my blood flow very well, therefore, resulting in better workouts and more energy. I also noticed a great increase in my libido. I recommend this product for anyone interested in increasing their blood flow."

Age: 18-24
Gender: Male
Daily supplement usage: 3-5 supplements daily
Referral source: Self-referred
Reason for usage: Enhanced performance
Duration of use: 30-60 days
2 of 2 people found this review helpful.
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Review 14 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 3 out of 5 3 out of 5
Eat with Care, February 4, 2008
By CHEVYGUY
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 3 out of 5 3 out of 5
Satisfaction: 3 out of 5 3 out of 5

"This substance which I use for heart health must be taken slowly with food. It can be a bomb in my stomach if taken alone. This product would be much better if it could be enteric."

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Review 15 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
Seems To Help!, December 9, 2007
By gootch from Bartlett

"I have 2 forms of Lupus & just had ANOTHER Hospital stay (Reflare/blood clot, etc.) Yuk. Nearly had to spend my 10 yr. Wedding Anniversary in Room 501. Due to the meds, I'm taking these, my cinnamon & lots of Calcium due to scoliosis & Menopause. I've heard about Nitric Oxide as I watch QVC & Dr. Edward Taub & his partner raved about this item in their book. I'm so glad that Vitacost carries this in a size (& price!) we can afford! Thanks!"

Age: 45-54
Gender: Female
1 of 2 people found this review helpful.
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Review 16 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
Awesome, October 3, 2007
By prepp
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"Awesome product.. and very efficent company,, will use them again.."

0 of 1 people found this review helpful.
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Review 17 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
GREAT PRICE, September 4, 2007
By MUSCLE
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"THIS PRODUCT HAS BECOME A BIG HIT WITH THE PEOPLE WHO WORK OUT AND THAT HAS DRIVEN THE PRICE HIGH, BUT NOT AT VITACOST.
THANKS FOR A GREAT PRODUCT AT A LOW COST."

0 of 1 people found this review helpful.
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Review 18 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 2 out of 5 2 out of 5
No way, September 3, 2007
By piesyor
Value: 1 out of 5 1 out of 5
Quality: 2 out of 5 2 out of 5
Effectiveness: 1 out of 5 1 out of 5
Satisfaction: 1 out of 5 1 out of 5

"didn't work"

0 of 1 people found this review helpful.
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Review 19 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
L-Arginine--1800mg, July 4, 2007
By OLGUY1 from Missoula,MT
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I love the outdoors, and since I've been taking
L-Arginine my hands and toes with stand the cold
weather a whole lot better. I believe that it helps
to circulate my blood better. I can ice-fish almost
all day without even putting my gloves on.
I feel this is a great product. Thanks."

Age: 55-64
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Friend
Reason for usage: Specific health concern
Duration of use: Over 180 days
5 of 5 people found this review helpful.
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Review 20 for NSI L-Arginine -- 1,800 mg - 200 Capsules

Overall Rating: 5 out of 5 5 out of 5
effective pump, May 30, 2007
By jaybo45
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"Gives me a good pump while lifting weights. This is alot cheaper that taking 3 to 4 scoops of whey protein to get 1800 mg."

2 of 3 people found this review helpful.
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