Natural Factors L-Lysine 500 mg (90 VCaps)

90 Vegetarian Capsules
by Natural Factors
Product ID: NF02823
Save 17%

Natural Factors L-Lysine 500 mg Free Form Amino Acid - Cold Sore Relief


One of the most natural nutritional aids for the herpes simplex virus (HSV) is the amino acid L-Lysine. It provides cold sore relief by helping to reduce their recurrence, severity, and healing time. L-Lysine is one of nine essential amino acids that the body needs for repairing tissue, forming collagen, and producing hormones. It is considered essential‚ because the body cannot manufacture it and it must be obtained through the diet.

People who have problems with HSV may need supplemental L-lysine to keep the virus in check. Natural Factors L-Lysine is a free-form amino acid which is more effective than when obtained directly from food. Each 500 mg is delivered in a vegetarian capsule to benefit vegetarians, vegans, or people following restricted diets who may not get enough L-lysine through food sources alone.

L-lysine should be an essential part of everyone 's nutritional plan to prevent flare-ups of HSV, in whatever form it may take. For the most effective control of HSV, combine L-lysine supplementation with a low-arginine diet. Taking it with vitamin C and zinc may also provide additional benefits by supporting immune system health.


    • 500 mg capsules go to work quickly relieve against sores (herpes simplex virus)
    • Contains no corn, soy, wheat, gluten or yeast
    • Vegetarian capsules

Directions: 2 capsules 3 times daily up to 6 months or as directed by a health care practitioner.


Supplement facts
Serving 1 Capsule
Serving: 90
Serving: Amount/Serving %DV
L-Lysine (chlorhydrate) 500 mg
** Daily value not established.
Other ingredients: Rice starch, vegetable capsule (carbohydrate gum [cellulose], purified water, silica), vegetable magnesium stearate quality (lubricant).
2 capsules 3 times daily up to 6 months or as directed by a health care practitioner.

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Customer Reviews

Based on 5 reviews
Deb Chourney

Not sure yet sorry

Rose Lucas
Good product

I learn from these reviews.

Can somebody tell me when to expect to talk to a rep by phone?? Hannah, can you call me???

Stacy L.
Great product!

I like that this comes in a vegetarian capsule. Great value also.

Barbara A.
Natural Factors L-Lysine

I have suffered from cold sores since I was a teenager. It seemed stress was a big factor. I still get them from time to time as the virus never leaves your body.
Now, when I feel one coming on I take L-Lysine and the outbreak is not nearly as bad as it used to be. The length of time and the intensity of the out break is way less.
The other household member that gets it on a regular bases is our cat.
He has a very bad immune system and is prone to"rodent ulcers".
The name does not refer to how a cat gets this infliction. It is a sore on the mouth area and is usually treated with a cortisone shot from the vet.
Cortisone is very hard on a small animal and can shorten their life span.
I did not want to continue on this route as our cat was getting them every 4 months.
I did some research and found out that cats can have L-Lysine and has been shown to help with the immune system. Just as it does in humans. Some cat products are now starting to add L-Lysine as a supplement in their product.
I started him on L-Lysine ( on the approval of our vet) and he has been ulcer free for over a year now.
He gets a third of a capsule in his food morning and night for about 3 days and then none for 3 days and so on.
It is tasteless and odorless and he just eats it down.
The L-Lysine is a powder in the capsule so this is very easy to administer.
As there is no cure for rodent ulcer this has been like a miracle for our cat.
I highly recommend this product for both humans and your pets.
And thank you to Vitasave for their prompt service and extremely courteous and helpful service on the phone. I am very, very happy with this Vitamin " store".

Bob C.

Great service, the product is top notch, no 'winter/summer' lip sores in over three years. I will continue to order from you folks, bummer you're way out on the Werst I'm in Ontario. Thanx folks,, good job all round. Bob