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Now Foods, L-Lysine Pure Powder, 1 lb (454 g)

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In Stock
  • Expiration Date: Jun 2019
  • Shipping Weight: 1.42 lbs (0.64 kg)
  • Product Code: NOW-00240
  • UPC Code: 733739002402
  • Package Quantity: 1 lb (454 g)
  • Dimensions: 6.8 x 4.2 x 4.2 in, 1.2 lbs (0.54 kg)
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Product Overview


  • Essential Amino Acid
  • Supports Collagen Synthesis
  • Healthy Immune Function
  • Non-GMO
  • A Dietary Supplement
  • Vegetarian/Vegan
  • Amino Acids
  • Family Owned Since 1968
  • GMP Quality Assured

Now L-Lysine is a Pharmaceutical Grade essential amino acid.

L-Lysine is an essential amino acid that must be obtained through the diet or through supplementation. Lysine is necessary for the production of all proteins in the body, and is required for the maintenance of the structural proteins collagen and elastin, which form all connective tissue such as skin, tendon, and bone. L-Lysine is also a precursor to L-carnitine, which is needed for fat metabolism and energy production. In addition, L-Lysine may help to support a healthy immune system and proper cardiovascular function.

Suggested Use

Take 1/4 level teaspoon daily.

Other Ingredients


Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.


This product is sold by weight not volume.

Caution: For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition. Keep out of reach of children.

Do not eat freshness packet enclosed.

Store in a cool, dry place after opening.

Supplement Facts
Serving Size: 1/4 Level Teaspoon (approx. 552 mg)
Servings Per Container: about 822
  Amount Per Serving % Daily Value
L-Lysine (from L-Lysine Hydrochloride) 435 mg *
*Daily Value not established.
iHerb Customer Reviews

Très rapide et sûr. Pour le port vers la France PRENDRE "AIR MAIL PREMIUM" (SUIVI)

Posted by 4964190721226407947 on Feb 19, 2016

Prix très intéressant.

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keeps herpes away

Posted by arturas on Oct 17, 2015

great stuff,no more herpes outbreaks for me so far for a month, totally recommend to people who have herpes, stuff really works

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Trustworthy quality

Posted by MGG-ThreeTwoFour on Jul 22, 2015

We use l-lysine to help suppress the symptoms of our cat with feline herpes. When he's on a regular dose (a higher dose of 500 mg, 2x/day), his runny/ulcerated eyes are calm and clear, and his wet sneezing is down to a minimum.ysine powder works great, and offers great savings. I tasted the powder myself--a little bitter, but in a highly-flavored wet food, it didn't seem to bother our cat. Opening l-lysine capsules and mixing the powder into his wet food worked just fine but got expensive after a while. Plus, all of those gelatin capsules were just wasteful (and annoying). ** For new customers of iHerb, please also visit my page for more product reviews **

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Cats like it!

Posted by 5161673117210370200 on Jul 22, 2015

We have tried other brands of L-Lysine before with our kitties (mixed with their food) and either they wouldn't touch it or we had to use flavor enhancers to sneak it past them. I checked with our vet first before purchasing this one to make sure it was OK since some of our kitties are extreme special needs with life threatening issues. This one they will actually eat in their food with no extra flavor enhancers...no tricks of any kind.

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Great! Use it For My Cat

Posted by Zenzie on May 02, 2015

Tried this along with Lactoferrin by Jarrow, have been giving it to my cat. He was diagnosed with feline herpes virus. The vet injected him two different times with shots and even though he acted better right away, it only lasted a few days before he started declining again. I read in a forum that Lysine and Lactoferrin was a good combo for this type of feline illness. Ordered both from iHerb and then mix it into my cat's food (canned food) with a little water, made it a little soupy, twice a day (1/8 teaspoon Lysine & 1/2 capsule Lactoferrin) and within a few days he started acting better. By the end of the week he was so full of life, it was like he went back into kittenhood. It's been 4 or 5 months already and he's doing great. I cut back the amount to only once a day. When he starts acting a little tired, or I catch him sneezing that's when I know the virus is trying to come back... so I'll do an extra dose for a day or two and it goes away. Very happy with this product.

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