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Source Naturals, L-Lysine, 3.53 oz (100 g)

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In Stock
  • Expiration Date: Mar 2020
  • Shipping Weight: 0.35 lbs (0.16 kg)
  • Product Code: SNS-00135
  • UPC Code: 021078001355
  • Package Quantity: 3.53 oz (100 g)
  • Dimensions: 2.4 x 2.4 x 4.4 in, 0.3 lbs (0.14 kg)
Product Overview


  • Amino Acid Supplement
  • Free-Form Powder

L-Lysine is an essential amino acid which acts as a precursor for several other amino acids, including L-citrulline (needed in the body for normal protein metabolism) and L-carnitine (needed for fat metabolism). L-Lysine is crucial for the formation of collagen, a major part of the body's connective tissues. L-Lysine also contributes to energy production when converted to acetyl coenzyme A, one of the principal fuels for the Krebs cycle.

Suggested Use

1/4 to 1/2 teaspoon daily between meals.

Other Ingredients

Suitable for vegetarians and Hypoallergenic: Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no starch, salt, preservatives, or artificial color, flavor or fragrance.


Note: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.

Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.

Supplement Facts
Serving Size: 1/2 Teaspoon
Servings Per Container: 73
  Amount Per Serving % Daily Value
L-Lysine (HCl) 1.36 g
†Daily Value not established.
iHerb Customer Reviews

Easy to use and keeps kitties healthy!

Posted by 4965724073797898805 on May 23, 2016

We use this all year round to keep our kitties healthy. Just a little sprinkle on their wet food and they are good to go. No measuring, no opening capsules. Nips a cold or virus in the bud so everyone is not sick all the time. We love this lysine!

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Cold sore relief

Posted by 4612120995713906551 on May 09, 2016

I've had cold sores for my entire life and lysine has never failed to give me relief. This one is excellent value for money vs tablets and great quality. I like powders as they tend to not have fillers and sugars in them.

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good stuff

Posted by 4758821500823930195 on Apr 06, 2015

Great product

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highly recommended

Posted by Reviewer1344878 on Mar 24, 2015

this is super, took care of my cold sore immediately and also give it to one of our Border Collie for his scratching, yes it stopped the scratching...

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Excellent Product

Posted by Reviewer1091779 on Jan 12, 2014

Excellent Product

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