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Reviews Home >  Supplements >  Amino Acids >  L-Lysine
Top Rated Product
NSI L-Lysine -- 500 mg - 300 Capsules

NSI L-Lysine -- 500 mg - 300 Capsules

Promotes Healthy Gum and Lip Tissue. L-lysine, an amino acid, is particularly helpful in restoring normal arginine levels, which is important for the maintenance of healthy gum and lip tissue. L-lysine nutritionally modulates the production of arginine, and thereby boosts the body's defenses against arginine-related assaults. 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: 4.533 out of 5 4.5 out of 5
28 of 30 (93%) customers would recommend this product to a friend.
Product Details

Customer Reviews for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
Fair price, July 4, 2009
By frankiecarl
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

"It was great to buy what I wanted at a fair price. It was for my cats and it works perfectly. Drug stores/vets charge too much for the same product."

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Review 2 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
great purchase, June 11, 2009
By angeleyes0812
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

"These capsules are the best. My daughter is much happier with them. The tablets were just huge and hard to swallow. Thanks."

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Review 3 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 4 out of 5 4 out of 5
L-Lysine, May 18, 2009
By ctravlngrl from Alabama
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: 4 out of 5 4 out of 5

"L-Lysine is a fabulous amino acid that will shorten or even delete the onset on fever blisters. This product is a great value for the money."

Age: 55-64
Gender: Female
Daily supplement usage: 3-5 supplements daily
Referral source: Other
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 4 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 1 out of 5 1 out of 5
Not sure what HCL stands for..., April 3, 2009
By Florance from Atlanta, GA
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

"but from what little research I've done (do your own), it could mean "the cheap stuff". I've taken a brand of NATURAL Lysine for years and it helps me fend off colds and the flu. Well, I recently tried this brand instead and within a week, I was feeling ill. I had an important event to attend the day after the symptoms of me getting sick really hit me. I THOUGHT it might be this new brand so I went to a store during my lunch break at work and bought my old stuff. After taking 4 pills within several hours I started feeling better and was good to go the next day. So, I do not suggest using L-Lysine HCL. Find natural L-Lysine and use that instead."

Gender: Female
Reason for usage: Specific health concern
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Review 5 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
Absolutely essential!, March 18, 2009
By granni
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 a tendency to get cold sores frequently, but since I use two a day of these, I rarely ever get them anymore. I wouldn't be without."

Age: 55-64
Gender: Female
Daily supplement usage: 6+ supplements daily
Referral source: Physician
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 6 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
Good news for your skin!, January 10, 2009
By Jean7770 from Temple, TX
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 is an excellent product. It has helped reduce the length of time cold sores stay around and is great overall for good health, especially health for your skin."

Age: 55-64
Gender: Female
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: 61-180 days
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Review 7 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
Great Product, December 11, 2008
By KrissyH from Los Angeles, CA
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 can't find capsules in the store ...so I was really excited when I found them on here. The ones in drug stores are hard to swallow, and have jagged edges. I take a bunche of these throughout the day when I get a cold sore and they work great."

Age: 25-34
Gender: Female
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: Less than 30 days
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Review 8 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
Quality Oral Healh for Less, November 12, 2008
By Leota
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

"L-Lysine provides excellent support for over-all mouth health. I take one daily for oral health as well as calcium absorption. This 500 mg. - 300 capsule bottle is convenient, and is very reasonably priced."

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Review 9 for NSI L-Lysine -- 500 mg - 300 Capsules

Top 1000 Contributor Top 1000 Contributor
Overall Rating: 5 out of 5 5 out of 5
Great Value, October 18, 2008
By Darkko from Kingsport, TN
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 this with my NSI Tryptophan to increase absorption. At 1 a day this will last me 10 months! Great value!"

Age: 35-44
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: 30-60 days
1 of 1 people found this review helpful.
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Review 10 for NSI L-Lysine -- 500 mg - 300 Capsules

Top 500 Contributor Top 500 Contributor
Overall Rating: 5 out of 5 5 out of 5
cold sore relief, October 10, 2008
By breezer63 from Florida

"i spend a lot of time in the sun and take this once a day year round. when i get a cold sore from the sun i increase the amount i take on a daily basis."

Age: 65-74
Gender: Female
Daily supplement usage: 6+ supplements daily
Referral source: Physician
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 11 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
Best purchase ever, August 16, 2008
By Aaqil from VA
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

"Very spontaneous shipping and reasonable and effective product"

Age: 35-44
Gender: Female
Daily supplement usage: 1-2 supplements daily
Referral source: Other
Reason for usage: Specific health concern
Duration of use: 30-60 days
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Review 12 for NSI L-Lysine -- 500 mg - 300 Capsules

Top 1000 Contributor Top 1000 Contributor
Overall Rating: 5 out of 5 5 out of 5
EZ to swallow, July 27, 2008
By Croz from Riverdale, Utah
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 is everything my previous was plus this capsule it is much easier to swallow than the tablet was."

Age: 65-74
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: 30-60 days
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Review 13 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 4 out of 5 4 out of 5
Use for canker sores, May 23, 2008
By gdbflorida from Florida
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

"I only use Lysine as-needed, that is when I have a canker sore. Usually it helps reduce the severity of the sore."

Daily supplement usage: 6+ supplements daily
Referral source: Other
Reason for usage: Specific health concern
Duration of use: 30-60 days
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Review 14 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
NSI L-Lysine, February 27, 2008
By GentleRick from PENNSYLVANIA
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

"iI am 70 years old and a long time suppliment user... In great health very little Grey hair and very active... I look 20 years Younger then I really am... I have used L-Lisine for many years to clear up Fever blisters/cold sores which occur on me each time I get over a cold... The duration of the cold sores are reduced dramatically when I add L-Lysine to my daily diet... I have recommended it to many others and the same great results happen to them as well... Thank you NSI..."

Age: 65-74
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 15 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
great product, January 29, 2008
By elvi from loveland, co
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

"in winter i often get the irritating cold sore and the l-lysine seems to be controlling this problem nicely"

Age: 45-54
Gender: Male
Daily supplement usage: 3-5 supplements daily
Referral source: Friend
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 16 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 1 out of 5 1 out of 5
product ineffective!, December 18, 2007
By nealfg
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

"First brand of lysine that did not perform as expected."

0 of 1 people found this review helpful.
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Review 17 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
THE L in COLA, December 14, 2007
By rabbit10
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

"KEY to increase mass."

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Review 18 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
Staying cold sore free!!!, November 30, 2007
By MoomKitty from N.C.
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

"Love this Lysine! Not all Lysine is the same - I depend on Vitacost's NSI brands to insure I'm getting a reliable source of vitamins/minerals.
If you want to stay cold sore free, this is for you. I take a maintenance dose of 1000 mg/day, but when I feel a cold sore coming on I take 3000 to 5000 mg immediately - this usually stops them in their tracks! (tapering it back to tje maintenance dose over next few days) If I do get one I do the same thing - it shortens the life of it dramatically."

Age: 35-44
Gender: Female
Daily supplement usage: 3-5 supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 19 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
great to fight cold sores!, September 28, 2007
By GusSD 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 did not believe it, I suffered all my life oportunistic outbreaks. I start taking this supplement almost daily and I've been cold sore free for more than a year!!! The price here beats them all. c'mon a bottle last almost a year!"

Age: 25-34
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Other
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 20 for NSI L-Lysine -- 500 mg - 300 Capsules

Overall Rating: 5 out of 5 5 out of 5
Great Buy, July 6, 2007
By Anonymous Reviewer
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 is the best buy I've ever found and continues to be so."

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