No Thanks

Your 10% Off Promo Code is on the Way! Thanks for signing up for emails.

You're now signed up to receive exclusive deals and savings opportunities!

Thanks again for connecting with us. Keep an eye on your inbox — your first coupon is on its way!

Thank You! This email address is already signed up

You are signed up for the following:

  • Offers
  • Recipes
  • E-Newsletter
  • Updates & Reminders

Thank you for your interest and be assured that you will continue to receive our emails at this address.

Look for your next communication from us within the next week.


We are having trouble processing your request.

Our apologies!

Please try again later.

Search Please enter an item number or keyword
Shop by
Do You
Need Help?

Swanson Ultra

AjiPure L-Lysine, Pharmaceutical Grade

AjiPure L-Lysine, Pharmaceutical Grade

Item: SWU452

  • Pharmaceutical grade

  • From Japanese-based Ajinomoto

  • Immune system support*

500 mg 90 Veg Caps
Veg Caps Size: 00

Now $4.71
Extra 25% Off
Was $6.29
MSRP $9.99
Save 53%
Yes! I want 10% off and free shipping over $50 on my next automatic shipment of this item.  days. Learn more
In Stock

Supplement Facts

Serving Size 1 Veggie Capsule

  Amount Per Serving % Daily Value
L-Lysine (from AjiPure®Pharmaceutical Grade L-Lysine HCl) 500 mg *

*Daily Value not established.

Other ingredients: Cellulose (vegetable capsule), rice flour, magnesium stearate, silica.

Suggested Use: As a dietary supplement, take one veggie capsule per day with water on an empty stomach.

AjiPure® amino acids stand for purity, efficacy, and safety. Ajinomoto is the leading supplier of amino acids for medical use, so you can be sure to trust the best.

AjiPure® and the AjiPure® logo are registered trademarks of Ajinomoto, Inc.

Relative Size

Printable Size Guide

Shipping Weight

.22 lbs

  • Pharmaceutical grade

  • From Japanese-based Ajinomoto

  • Immune system support*

Swanson AjiPure L-Lysine is an essential amino that supports the immune system and helps the body fight stress.* Produced through fermentation using raw ingredients of non-animal origin, AjiPure amino acids are 99 to 100% pure. Impurities in other brands can be six times higher!

Swanson Ultra AjiPure L-Lysine, Pharmaceutical Grade Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

AjiPure L-Lysine, Pharmaceutical Grade is rated 5.0 out of 5 by 28.
Rated 5 out of 5 by from Does what it's supposed to Since making it part of my regimen I've noticed positive results and will keep taking it.
Date published: 2017-07-03
Rated 5 out of 5 by from Best Lysine quality I have purchased a lot of other Lysine brands but this one does the job taking fewer number of pills.
Date published: 2016-12-27
Rated 5 out of 5 by from Veggie Caps I am a vegetarian, and I like to take veggie cap products. I keep l-lysine in my medicine cabinet as a supplement that helps keep my system balnced and regulated. It's a great product, and I'm very happy with it. Will definitely buy again.
Date published: 2016-02-21
Rated 5 out of 5 by from good product for the price I use it regularly. Boosts that part of the immune system.
Date published: 2014-10-27
Rated 5 out of 5 by from Great Results from Product This is the best Lysine I've ever used. Every other product I've tried, I had to take twice as much for effectiveness. I love Swanson's pharma grade amino acids and great prices as usual.
Date published: 2014-10-26
Rated 5 out of 5 by from Great product If you due your research on the internet you will find this one is the best you can buy for this supplement.
Date published: 2014-09-24
Rated 5 out of 5 by from Potent. I am impressed by the quality of this brand of amino acids. This is the first time that I tried the Ajipure Swanson Ultra line, and I believe that is even higher quality than the more affordable forms of lysine in the Swansons line, which I have tried as well. At the time that I am typing this review, you get about a month-and-a-half, or 90 days worth of l-lysine at the suggested amount, in a light-protective brown plastic bottle, for less than a hamburger with fries and a drink at many fast-food restaurants. I take this only temporarily for health reasons not indicated in the possible benefits listed in the product description, and along with elderberry, it worked. I am unable to post exactly what, due to governmental regulations. Overall I like the quality of this over the more affordable version of this from the other Swansons lines. I would buy this again. :)
Date published: 2014-08-18
Rated 5 out of 5 by from A keeper for me This lysine is high quality plus I appreciate the low amount of "other ingredients". Good job Swanson.
Date published: 2014-06-06
Rated 5 out of 5 by from Lysine This is the most effective Lysine product I have ever tried. I can achieve results with 1 or 2 capsules that used to take me 10 to 12 tablets of other brands. And the whole bottle costs less too! I could not be happier with the quality and efficacy of AjiPure L-Lysine!
Date published: 2013-11-11
Rated 5 out of 5 by from Excellent Product Very good pharmaceutical grade product in a dose I can stagger throughout the day when necessary.
Date published: 2013-09-03
Rated 5 out of 5 by from No doubt about it! I've tried many brands of lysine (500mg & 1000mg). This one by far is the best. I know it works because when I run out and hit some stress along the way, my body shows visible effects. It works, period.
Date published: 2013-08-14
Rated 5 out of 5 by from Great quality and great price!
Date published: 2013-06-19
Rated 5 out of 5 by from Love this!! I love this product! It's the only thing that works for me!!
Date published: 2013-04-11
Rated 5 out of 5 by from This product is amazing with results fast for what is needed
Date published: 2013-04-02
Rated 5 out of 5 by from Great Standardized Amino Acid Fabulous price and great quality supplement.
Date published: 2012-11-08
Rated 5 out of 5 by from Ajinomoto AminoScience, LLC Ajinomoto, Japan, is the premiere free-form amino acid producer in the world. The Swanson Label Pharmaceutical-Grade AjiPure L-Lysine from Ajinomoto works well and is a great value!
Date published: 2012-07-05
Rated 5 out of 5 by from Needed something natural to help immunity.
Date published: 2012-04-02
Rated 5 out of 5 by from First thing in the morning, I take lysine on an empty stomach. I also take b complex, vitamin d, st. john's wort and bht for increase immunity. I was glad to find this on Swanson's.
Date published: 2012-02-20
Rated 5 out of 5 by from Great product This product has really helped to increase my energy . I can tell a difference in my body's ability to handle stress after taking this supplement.
Date published: 2010-09-03
Rated 5 out of 5 by from Love this line of products We are really pleased with the quality of the AjiPure line, and this one is no exception. We will continue to use this product.
Date published: 2009-09-12
Rated 5 out of 5 by from This really works This product really works. Recently I decided to stop taking it as I'd taken it for so long I had forgotten how effective it was. Was I ever sorry! I'm taking it again and I won't make that mistake again!
Date published: 2009-09-08
Rated 4 out of 5 by from Great product We had been paying much more for L-Lysine at another location. We are very satisfied with Swanson. Great products at much better prices.
Date published: 2009-08-25
Rated 5 out of 5 by from Buy with confidence I have taken this product for quite a while now and it is wonderful how much I like the way it makes me feel with knowing I am taking a pure L-lysine that gives my body what it needs. I take it first thing every morning before I start my breakfast plans. The UPS truck is just now arriving with more Swanson products that I saved "big time" on and I am one happy customer. Their prices are the lowest on all name brands too. I have done my company researches! I will always be happy ordering from SWANSONS. They stand behind each product with a money-back guarantee and a promise of the highest quality available. I believe in the results of this product.
Date published: 2009-07-23
  • y_2018, m_1, d_21, h_6
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.6
  • cp_1, bvpage1
  • co_hasreviews, tv_5, tr_23
  • loc_en_US, sid_SWU452, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_swansonhealth
Swanson Quality Assurance

Why Shop Swanson®?

We know how important your health is to you and your loved ones. That’s why we’re focused on delivering only high quality products you can trust at the best value.

Our lab evaluates every product to make sure it’s compliant with strict standards and government regulations, and we fully believe in and stand behind our products. If you’re dissatisfied for any reason, we’ll give you a full refund and pay return shipping.

Swanson's Standards

We are dedicated to offering the highest quality products at the best price. Find out more about how we ensure such a high standard in everything we do.

Learn More
Customer Service

Easy Refill

  • Get your favorite products delivered automatically
  • 10% off future orders of Swanson brand products in your subscription
  • FREE standard shipping on all future orders over $50
  • Control the frequency, delivery date, item quantity... or cancel at any time
  • Email reminders before each delivery
See all FAQs here