Life Extension L-Lysine, 620 mg, Essential Amino Acid for Healthy nitrogen Balance, Calcium Metabolism, Stress Response & More, Gluten-Free, Non-GMO, Vegetarian, 100 Capsules

I’ve been taking this L-Lysine supplement daily, and it’s a reliable, high-quality option—non-GMO, vegetarian, and easy to mix with my other supplements. It effectively supports stress response, nitrogen balance, and metabolism. Most noticeably, it has strengthened my skin, hair, and nails, leading to faster hair growth, thicker strands, more resilient skin, and improved overall appearance. It has also enhanced my immunity (fewer minor illnesses) and boosted physical energy and recovery.

So, a little back story on myself. I have a love/hate relationship with all things citric. I cant get enough of lemonade, orange juice, grapefruit, you get it. Only problem is i have a low tolerance for citric acid, the stuff causes rather painful boils to rupture in my mouth (canker sores) within hours of drinking something especially potent, such as a glass of fresh squeezed lemonade. This condition is largely unresearched, and set in during my early teen years. I suffered for several years, basically swearing off of anything with citric acid being one of the top 5 ingredients. I didnt do well. I relapsed a lot, so i would just kinda keep a tab in my head, "ok thats 1 mtn dew, i can risk 3 more this week before I can't eat for a few days due to 3 or 4 lesions forming around my tongue or lips making even speaking painful.....screw it, going for broke". Around 17, my older sister heard me complaining about this and she told me she took L-Lysine tablets to help with her lesser version of what I now assume is a genetic hand-me-down. Lysine heals the soft tissues in your body you see, and I soon discovered if i took them, it had a dramatic effect on my healing rate, but if i took them regularly, I'd pretty well be canker sore free. Ive tried 2 or 3 brands of lysine capsules over the last decade. My last go to must've swapped something out as I was noticing a marked decrease in effectiveness. So I tried Life Extension. It was a smidge pricier, but whatever if i can enjoy my citrus drinks. As a side note i now work for a large amino acid producer, who used to make lysine(since discontinued) and now have a sort of intimate awareness of the process. Anyway, there are grades of product meant for different purposes: pharmaceutical, food additive, veterinary, etc. This particular brand must use a higher grade stock in their capsules, I can feel a sore coming on, take 1 capsule, and the next morning the sore has disappeared. I haven't had any sores since i purchased this stuff. I dont take it daily either, only when i feel one about to emerge, and the effect seems to stick around for a while. My previous brand of choice was unable to achieve this level of healing or in such a time frame. Truly top grade stuff. You guys have me for life, or atleast till you sell out and swap to a lower grade amino acid. Please don't.

Taking this supplement has stopped my recurrent Shingles from coming back. I was having Shingles that would last about six weeks, would get a week or two of relief, then they would come back. Once I started taking this supplement, Shingles have not returned in more than six months. Talk to your doctor, but try this!

No taste and works well.

I like this brand. I have a few supplements in this brand and have never been let down. I trust this company. Fair prices too.

Great brand

I've reordered these many times. I've tried other brands but keep coming back to this one...it seems to work for what I wanted. Helps keep the corners of my mouth from cracking.

I woke up one morning with a case of shingles in my hair and on my face. I had used L-lysine for a previous bout with shingles. The first brand I ordered were impossible to swallow (even when I cut them up). These were perfect, easy to swallow and helped to cure the shingles in about I week I think. They were still present in that you could see them, but the pain and itching was completely gone.

I'm so glad this comes in capsules—they’re way easier to take than those massive oval tablets from the chemist. Even better, I managed to find it on special!

Excellent quality products from Life Extension, I often buy them!

L-Lysine is tricky to find in capsules. I have issues taking the large tablets, these capsules, big but easy to take. Really pleased I tried. Will be buying more.