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L-Lysine Capsules - 500mg

A necessary building block for all protein

74 reviews9810080
Only 8.3p per capsule
In stock
- Best Price
Only 8.2p per capsule
In stock
In Stock

Key features

  • An essential amino acid
  • Required for protein synthesis
  • Cannot be made by the body
  • Premium, vegetarian friendly capsule
L-Lysine 500mg capsule view
Capsule Size
23mm x 8mm two-piece capsule
  • Description
  • Product Information
  • Feefo Reviews Reviews

What is L-Lysine? 

Lysine is an essential amino acid, which means that the human body cannot synthesise it.

Why take L-Lysine?

Amino acids are critical to life, and have many functions in metabolism. One particularly important function is to serve as the building blocks of proteins, which are linear chains of amino acids. Amino acids can be linked together in varying sequences to form a vast variety of proteins.

L-Lysine is a necessary building block for all protein in the body.

Just Vitamins L-Lysine provides 500mg of high-grade ingredient in fully vegetarian capsule.

Nutritional Information
One capsule provides L-Lysine 500mg.
List of Ingredients
L-Lysine, Bulking Agent (Maltodextrin), Hydroxypropylmethyl Cellulose, Magnesium Stearate.
Dosage / Suggested Intake
Swallow one to two capsules per day with food.
Legal Category
Food Supplement


Customer Reviews for L-Lysine 500mg

The views expressed below are the personal opinion of Just Vitamins customers. Just Vitamins does not endorse these views, nor should they be regarded as health claims or medical advice. All reviews are collected and verified as genuine by a 3rd party called Feefo.

Overall product rating 9.8 / 10 - 74 customers have independently reviewed and recommend L-Lysine from 74 reviews (showing latest 50 reviews)
Review Date
Review Details
Service rating: Prices are very competitive, the range of products is very wide and being added to regularly - and the delivery is speedy and efficient. The web site is really easy to use too.
Product: Easy to take, and recommended by some scientists as an antiviral supplement. My immune system isn't great, and in these pandemic times, I believe that this supplement could help protect against Corona-type viruses as well as the documented DNA viruses. This isn't an established fact - but I think it makes sense for those of us who are not well to have this as an extra defence.
Service rating: Great, arrived fast. Good price.
Product: I take these to try and prevent cold sores - whenever I feel like I might be getting one I take a few of these tablets, haven't had one since I started taking them (could be down to several factors but I really do think these help).
Discount given. Delivered speedily. Packaging now recyclable. All good😊
As excellent as ever. I’ve been buying from them for years.
I am in no position to make comment. Due to some mix up, I thought I had placed an order with "Natures Best" of Tonbridge Wells, but I failed to notice that when I selected "Vitamins" (as one would from Natures Best) I found that there was no slot for Account number, so I just went through as a guest. The pills duly arrived quite promptly. Thank you. Goodbye.
Easy to use website. Clear expectation on delivery.
Great quick service
Service rating: The vitamins I ordered came the next day. Brilliant service. Will order again.
Product: I get monthly cold sores and since taking L-Lysine I’ve not had one for 2 months
Service rating: You can rely on Just Vitamins for an excellent service and a good quality Vitamin whatever one you orde.
Product: L-Lysine another vitamin for the me I take it for cold sore prevention and it works. If you suffer from these it's worth a try.
Service rating: excellent product excellent delivery
Product: because they were great value for money
Arrived very quickly. My only concern is that there is nothing on the packet to say it meets food quality standards.
Service rating: Like that the Lysine comes in pouch rather than plastic bottle. L-Lysine is an important supplement for vegan’s who don’t do well on pulses and grains. Prompt delivery.
Product: Because I am vegan mostly but have Sensitivity to most pulses and find most grains cause me discomfort. L-Lysine then becomes the limiting amino acid so essential to complement the proteins found in nuts, seeds and vegetables.
Product relieved cold sores and came quickly. Professional service, good product.
I’ve been using Just Vitamins for years - I’ve tried others but always return as they are excellent
Service rating: Order received very promptly and product exactly as described.
Product: Easy to swallow. I believe this product is good for the immune system.
Service rating: Good quick service
Product: Seem to help in keeping me healthy
Great service and prompt delivery. Highly recommended
Quick delivery, efficient service. Thanks
Service rating: Goods arrived promptly so would definitely use again.
Product: I was recommended to take this supplement to strengthen my immune system. I haven’t been using it long enough to really judge results as yet.
Service rating: Such a brilliant straight forward service from a company you can trust.
Product: It’s a thing that I rely on for no old sores. This is the first time I’ve bought this from Just Vitamins, I know I can trust the quality.
Service rating: Just Vitamins' service is second to none, as are their supplements. I always make the order but 2 of my Canarian friends take Just Vitamins' supplements too.
Product: Lysine is an amino acid that keeps my recurring shingles in check. Just Vitamins' quality is excellent.
Service rating: My last order received had been opened and an item was missing during transit. i notified Just Vitamins and they immediately sent me a replacement. i have been very satisfied with the service especially as i live abroad and supplements are very dear here.
Product: i buy this for my cat it seems to help his symptoms which have been less intense when he gets an episode of feline the virus
Service rating: The service was great, they arrived super quick and I’d definitely order from here again. Simple and easy!
Product: I’ve been using these for a couple of weeks and I haven’t had any coldsores so far. Also, they’re easy to swallow and definitely better than other lysine supplements I was taking before.
Service rating: Excellent quality. Very speedy delivery - I received my vitamins in Latvia much faster than estimated date of delivery stated. Very affordable prices. Definitely will order again and suggest to my friends/family.
Product: Haven't used them yet, but I think they're excellent quality like other supplements I've ordered before.
Service rating: Well priced just right for my cold sores delivered quickly thank you
Product: For cold sores and it works
Service rating: Everything was fine
Product: ok..........................................................
Service rating: Brilliant
Product: I’m taking it for cold sores 2 a day and haven’t had one since . Very easy to swallow capsules 😀
Service rating: Excellent service, with good quality products and timely delivery.
Product: Taking 1000mg daily to prevent pesky cold sores which come at this time of year. Definitely seems to be working to date.
Service rating: Easy ordering,fast delivery nothing more needed
Product: Useful,tackles skin problems caused by being run down
Items always sent promptly with no shipping costs. Discounted prices are competitive.
Service rating: very good product
Product: I`m happy with the product
Ordered just one item as a trial and it arrived very quickly . The packaging is enables the item to go through the letter box, so you don’t need to be at home to receive it. Overall very pleased with this first purchase and will buy again.
Service rating: Great Service and Great Tablets.
Product: These are much better than the last brand I was using. I have been able to reduce my daily dose from 1000mg to 500mg due to the quality, I trialled this with my old brand and I was breaking out within 48 hours. I will definitely be sticking to these and purchasing from here again. :)
Great service, fast delivery. Website easy to use while process, simple, straight forward I now buy all my vitamins through Just Vitamins
Service rating: I have been buying Coenzyme Q10 and Lysine from Just Vitamins for the last 5 years . Service and quality of goods never fails to be excellent.
Product: Good quality and easy to swallow.
Service rating: the vitamins arrived in next to no time, they were in-expensive and they served their purpose
the delivery was fine
Service rating: Received in good time and I like the minimalist packaging but which also details everything about the contents and the dosage, which is not the case with many providers! Also like the clear base to your pack which allows inspection.
Freephone also much appreciated, so no hidden costs.
Product: I presume the vitamins are good quality, but will have to wait and see...!
Service rating: Very straightforward buying experience. Easy to find what I wanted online and delivery was efficient. It's the second time I've purchased from Just Vitamins.
Product: As with previous orders, I was able to find the Vitamins I wanted easily and had no issues.
Service rating: Yes. The website was good and the delivery of my purchase was excellent.
Product: Very good quality and price.
No more half filled bottles. Everything comes in resealable & recyclable packages. And it's posted in a box that fits through your letterbox so no missed parcel notices either 😊
Service rating: Easy to order, fast delivery
Product: Been using this for a year now and only had one cold soar in all that time, instead of one a month before I started taking them
Service rating: Website was easy to use and navigate. Prices were ok. Delivery was efficient. Overall, no problems experienced.
Product: New to this so not sure how effective it is yet but seems to be fine!
Service rating: You email, they respond, they deliver - all quickly! Nicely packed in a self-seal pack.
Product: We are aware that these kind of amino acids need to be supplemented other than by food especially for older people.
Great products and excellent service!
Service Rating: Easy ordering, fast delivery, very happy with serviceProduct: Been taking these for 6 months and I have not had a cold soar in all that time and I suffered with them regularly, on my next 6 months worth and well worth taking.
Service Rating: Came promptly after simple orderiing.
Product: We all need supplements of this kind - the essential amino-acids. This is just one.
Service Rating: Easy to find products online, descriptions available on products, quick checkout and easy payment process
Product: first time I have bought this product and found out all I need to know about the product
Fast and good price
Service Rating: Excellent, great value.
Product: Product seems to be working to reduce rosacea although early days.

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