Lysine 400™

A natural, 100% pure essential amino acid to support your immune system. L-Lysine also plays an important role in energy production as well as in the production of collagen, which is essential for healthy bones, joints and connective tissue.

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Product Information


LYSINE 400 is a pure, natural source of the essential amino acid L-Lysine. Lysine is among the most frequently supplemented amino acids, because of its established role in immune system support, as well as its central role in fat burning and energy metabolism. Lysine is one of only nine amino acids referred to as essential because it cannot be produced by the body and is only available through diet or supplementation. Lysine is vital for the growth and development of all body tissues and is central to the production of energy, since it is a precursor to acetyl CoA synthesis – a critical component of all energy metabolism. Additionally, Lysine is also required to create Carnitine, which is necessary for all fat metabolism. Lysine also plays an important structural role in the formation of collagen – the basic protein structure of skin, bones, joints and connective tissue (tendons, ligaments and cartilage). In short, Lysine is among the most important of our body’s amino acids playing a multitude of critical roles in the most vital systems in our body. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.


Serving Size
1 Capsule
Amount Per Serving
% DV*
L-Lysine (as L-lysine hydrochloride)
400 mg
† Daily Value not established.
Other Ingredients: Gelatin capsule.

Suggested Use

Consume one capsule daily. You can increase your intake based upon your needs and as guided by your health care provider.

Product Label

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Customer Reviews

Based on 4 reviews


Cured my cold sores I started taking this supplement after finding out that it could help with cold sores, especially since I get shingles. I felt a slight tingle, yet couldn’t see anything until later because I wasn’t home. After arriving home, I could see a tiny blister. I took one of these supplements immediately and it was gone the next morning!!! This also occurred again, as soon as I felt the slight discomfort starting to occur, I took 1 Lysine and had no breakout. This was absolutely amazing and also no side effects. Thank you for another great supplement. Shingles are not fun!!!!!!
By Kathryn, SC on 11/9/2023

The Best Ever I had an infection on my finger and I get them sometimes from cutting my nails wrong or just biting. Anyway, I've gotten them most of my life and they usually last at least a week. I got one recently and I took a Lysene 400 in the afternoon, that evening and one sometime the next day and by that evening it was GONE. Unbelievable product! Thank you Andrew and I will always keep this one around.
By Valerie, TX on 12/24/2018

Face is Clear I use this product for cold sores... I take four capsules a day... I noticed by taking this product that my face is clear... I have mild acne and since taking this product for months my face is clear from both cold sores and acne...
By Christina, CA on 12/23/2018

Wouldn't be without it! For the past 5 years I have purchased lysine at the drugstore to help control cold sores frequency and severity. I received ProCaps brand just as I was getting a small cold sore in the corner of my mouth. I started using this brand right away and it was completely gone in 3 days! That never happened with any other brand. I was taking 9 a day (3 with each meal). Now I am hoping with this brand that they will be even less frequent. I take 6 daily (2 with each meal). Giving 4 stars instead of 5 because I am waiting to see if in fact they will be less frequent. Also, the cost is double the drugstore brand (because I always get them on sale) which is totally worth it if it works!
By Kimberly, NY on 1/25/2011

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