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Source Naturals, L-Lysine, 1,000 mg, 100 Tablets

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Source Naturals, L-Lysine, 1,000 mg, 100 Tablets

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Source Naturals, L-Lysine, 1,000 mg, 100 Tablets

In Stock
100 Tablets
100 Tablets
250 Tablets
  • Expiration Date: 01/2021
  • Shipping Weight:
    0.53 lbs
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  • Product Code: SNS-00142
  • UPC Code: 021078001423
  • Package Quantity: 100 Tablets
  • Dimensions:
    5 x 2.5 x 2.5 in, 0.45 lbs
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Product Overview


  • Dietary Supplement
  • Free Form

L-Lysine is an essential free-form amino acid which acts as a precursor for other amino acids, including 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 tablet daily.

Other Ingredients

Stearic acid, sorbitol, colloidal silicon dioxide, modified cellulose gum, and magnesium stearate.

Suitable for vegetarians. Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, 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 Tablet
  Amount per Serving % Daily Value
Calories 5  
L-Lysine (HCl) 1 g
†Daily Value not established.
iHerb Customer Reviews

Good quality Lysine, works well to keep my immunity up

Posted by Cbones on Nov 08, 2017 | Verified Purchase

These tablets are very big, but tasteless so not too bad to swallow. But if you're someone that struggles with big tablets, then get Source Naturals other Lysine, in capsules. They are all very good quality, they are easy to digest and swallow, and they seemed to make a marked difference in my immunity, especially prevention of cold sores. Note, to actively get rid of a cold sore infection that was in full force, I had to up the dosage significantly, to about 4-6 capsules daily, for about 2 days. Otherwise, 1-2 per day is perfect for prevention. I also felt it has helped my body and joints, and I feel less pain too.

Thanks for your feedback!


Posted by iHerb Customer on Oct 24, 2017 | Verified Purchase

I bought this to try and clear my skin. At first it was excellent and I noticed daily improvement. But after a few weeks it stopped working for me. It’s worth a shot, and maybe I should try taking more, but this probably isn’t a great long term solution for acne.

Thanks for your feedback!

Good For Value

Posted by Sleepy on Aug 28, 2017 | Verified Purchase

I've been trying l-lysine for a few good months now for my skin and hair. I can see there is some improvements to my skin, will have to wait and see give it more time.

Thanks for your feedback!

Helps prevent and treat cold sores!

Posted by iHerb Customer on Aug 26, 2017 | Verified Purchase

When I developed shingles one Christmas on my head and eye, I found that this was a recommended natural remedy. I took these frequently right away. Doing this, eating lots of garlic, using clay on the sores greatly reduced the breakout and I had no pain from the Shingles. Since then, whenever I feel the "tingle" of the cold sore, start taking Lysine. It helps greatly by either preventing a full outbreak and shortening any outbreak that happens. I would not be without this even though I don't get cold sores often. I have not had any further outbreaks of shingles either.

Thanks for your feedback!

Using for reactivated Epstein Barr Virus

Posted by iHerb Customer on Jul 27, 2017 | Verified Purchase

Have used other products from this brand and been very happy. 1st time I have used Lysine (3000 mg) and got an almost an immediate energy boost from it. I've already purchased another large bottle.

Thanks for your feedback!