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VetriScience Lysine Complete Creamy Chicken Flavor Triple-Action Immune Support Supplement for Cats, 2.75-oz jar

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At a Glance

  • Non-GMO
  • No Corn No Wheat No Soy
  • Natural
  • Immune Support
  • Digestive Health
  • Allergy Relief
  • Eye Care
  • Made in USA
  • All Lifestages
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About This Item

Details

  • This 3-in-1 lysine immunity supplement is designed to boost immune health and support immune cells in cats and kittens.
  • Daily lysine may help your feline manage sneezing, watery eyes, runny nose, and low energy levels.
  • Lactoferrin helps disrupt the growth of bad bacteria to promote a strong immune response.
  • Features a cheesy chicken taste for maximum flavor and easy serving.
  • Ultimate Strength Lysine Immunity Health was formulated by a team of veterinarians and nutrition experts for effective immune support.

Ingredient Information

Instructions

FAQ

Breathe Easy, Adventure Hard

VetriScience Lysine Immunity Health supplements give your cat the best daily support for respiratory, eye, and immune health. Science-backed lysine formulas for cats are made with premium ingredients and trusted by veterinarians everywhere to support strong, healthy immune systems at any age!

Advanced Formulas with Premium Ingredients

L-Lysine

An essential amino acid that promotes antibody production and helps curb respiratory discomfort.

 

Prodiet Lactoferrin

Supports and stimulates immune cells and helps to disrupt bacterial growth.

 

DMG

Helps to boost immune system response and helps the body to cope with stress.

Life's An Adventure. Lysine Helps Them Live It.

Multiple science-backed lysine formulas provide a perfect immune boost for every breed, size, and age.

  • Promote immune health
  • Strengthen immune response
  • Help them breathe easy
  • Support clean, clear eyes
  • Help manage seasonal allergies
  • Help kittens & seniors bounce back faster

No Fake Stuff. No Fillers. No Joke.

VetriScience immune support formulas use highly researched, trusted ingredients not found in other lysine supplements for cats—without fillers, hidden ingredients, or harmful preservatives. Each formula is carefully designed by veterinarians and nutrition experts, so you're only giving your cat what they need, with nothing they don't. Guaranteed.

About VetriScience

For over 40 years, VetriScience has helped pets live a life without boundaries. Premium pet supplements are formulated by veterinarians, recommended by pet professionals, and trusted by champions. VetriScience is committed to using only pure and highly researched ingredients to produce quality products that are safe, effective, and delicious!

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Questions & Answers

3 Customer Questions

Can we start giving it to kittens at 6 weeks old?

Answer by Chewy • Apr 28, 2026
This VetriScience supplement is formulated for kittens starting at 3 months of age. For kittens under 3 months old, please consult your veterinarian.

How many milligrams of l-lysine are in 1 full scoop?

Answer by Chewy • Sep 21, 2025
This supplement contains 500 mg of L-Lysine per serving (1.3 grams).

How many servings are in the container?

Answer by Chewy • Aug 16, 2025
There are approximately 60 servings per container.
Reviews
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4.1
Rated 4.1 out of 5 stars
116 Ratings
Terms & Conditions

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Dosage and Administration

82% Positive

Duration of Relief

79% Positive

Ease of Digestion and Tolerance

75% Positive

Effectiveness in Reducing Allergy Symptoms

84% Positive

55 Customer Reviews

Rated 5 out of 5 stars
Received Free Product
By Amber C on Aug 23, 2024

Easily digestible for IBS kitties

Been using the Lysine complete as a mix in for wet food for my kitty that has been diagnosed with IBS. Shes a picky eater and is on a single source protien diet

Been using the Lysine complete as a mix in for wet food for my kitty that has been diagnosed with IBS. Shes a picky eater and is on a single source protien diet. The lysine mixes in well with the wet food and no issues with getting the little IBS picky eater to comsume. Its a little early to say if its impacting a potive change but no adverse reactions with supplementing lysine complete with oral steroids. I do think that some skin irritation is down, especially redness around the ears using lysine complete. The product container is easy to open and has a wide opening that makes scooping the powder easy. Overall I will continue supplementing with Lysine to see if there are long term benefits.

Rated 5 out of 5 stars
Verified Purchase
By Ambre on Nov 26, 2025

Chronic boogers

I have a cat who was terribly sick when found as a wee kitten. He has grown up to be sloth of a cat with gross boogers and an excellent marksmen with projectile

I have a cat who was terribly sick when found as a wee kitten. He has grown up to be sloth of a cat with gross boogers and an excellent marksmen with projectile snot rockets. He’s been on countless treatments and he always gets back to his slimy/crusty self. While I love him no matter what I do feel bad for him. So I started using this product to see if it would make any difference. Idk if it’s wishful thinking or true results but his eyes seem less goopy and his nose is less drippy, and our walls are less crusty!

Rated 4 out of 5 stars
Received Free Product
By Unscented cat litter on Sep 3, 2024

Great immune support

I gave this to my 13 year old cat. She has had lots of sneezing. Watery eyes and the last few months has been a little more tired than usual. After taking this for

I gave this to my 13 year old cat. She has had lots of sneezing. Watery eyes and the last few months has been a little more tired than usual. After taking this for a few weeks. She has had less sneezing, no more watery eyes and has had much more energy. She has been having the constant zoomies at night. She would not eat in dry food but she ate it with no problem in her wet food.

Rated 2 out of 5 stars
Verified Purchase
By Jennifer on Sep 21, 2024

Made my senior cat vomit

Our cat had successfully been on L-Lysine powder for 13 years until we bought VetriScience when Vetoquinol Viralys was out of stock. After 7 days on VetriScience,

Our cat had successfully been on L-Lysine powder for 13 years until we bought VetriScience when Vetoquinol Viralys was out of stock. After 7 days on VetriScience, he began vomiting right after eating his wet food with the powder mixed in. You must give such a large scoopful twice daily since it contains other supplements besides L-Lysine, so I’m guessing the other supplements are causing him to not keep this powder down. Now that Vetoquinol is back in stock, I hope we can get a refund and get our kitty back on track!

Rated 5 out of 5 stars
Received Free Product
By Rmann1218 on Jul 23, 2024

Working so far!

Loving it so far! Both our cats really have enjoyed this, while they usually aren’t picky on flavor either, they ate it with their normal breakfast for the past

Loving it so far! Both our cats really have enjoyed this, while they usually aren’t picky on flavor either, they ate it with their normal breakfast for the past couple days without any issue. Our Maine coon mix, she usually will have respiratory discomfort at times, especially during Allergy season. This definitely seemed to subside her sneezing fits and runny nose, although I will keep using it especially on her to see further results. She was even licking her lips after looking for more!

Rated 4 out of 5 stars
Verified Purchase
By Helen on Jun 13, 2025

Helped my cat

My old calico sneezes and some brown goo comes out from her nose. I tried this product and even though she does not love the taste, I have been hiding the product

My old calico sneezes and some brown goo comes out from her nose. I tried this product and even though she does not love the taste, I have been hiding the product under her favorite delectable. I can't give her a full dose, but the half dose has helped her runny nose. She is sleeping less, following me around the house and she is not sneezing nearly as much as before.

Rated 5 out of 5 stars
Received Free Product
By PKKS on Jul 28, 2024

Hit with our senior farm cat

Our senior cat has been very pleased with this supplement thus far! Normally she is picky with any sort of food addition but she is happily eating this topped right

Our senior cat has been very pleased with this supplement thus far! Normally she is picky with any sort of food addition but she is happily eating this topped right on her dry food. Too soon to tell if this is helping her health, but just glad to finally have a supplement for cats that they like! It is also easy to measure, and sticks to the dry food well, instead of some powdered supplements just falling to the bottom of the bowl.

Rated 5 out of 5 stars
Received Free Product
By Maggie on Aug 18, 2024

Easy way to boost their health!

I have one indoor cat and two outdoor cats. The outdoor cats are subject to so many dangers, I know, but knowing that I can give them a scoop of VetriScience Lysine

I have one indoor cat and two outdoor cats. The outdoor cats are subject to so many dangers, I know, but knowing that I can give them a scoop of VetriScience Lysine twice a day to boost their immunity helps me so much. They aren't fans of treats so chewable supplements are lost on them. Sprinkle a little extra chicken on their meals and the rest is history!

Rated 5 out of 5 stars
Verified Purchase
By Alyssa on Apr 16, 2025

Great stuff, so glad to find!

This powder is good stuff and seems to be helping my boy kitty with his runny nose. Have had trouble with other powder mix-in supplements being not tolerated well

This powder is good stuff and seems to be helping my boy kitty with his runny nose. Have had trouble with other powder mix-in supplements being not tolerated well and kitty would end up not eating his wet food with the stuff sprinkled on it. That is not the case with this triple cheesy stuff. He always eats his wet food with no problem when it's got a scoop of the Lysine Complete in it. He seems to prefer it slightly mixed in to the wet food, so it's still tasty, but not fill his mouth with a dry powdery texture. I sometimes do a third scoop a day because his nasal runnies really have been persistent.

Rated 5 out of 5 stars
Verified Purchase
By Sickcat on Feb 16, 2026

Only thing that works!

My baby has IBS and struggles to gain weight. Other lysine supplements never helped but this triple action one changed his life! He gained a pound and started wanting

My baby has IBS and struggles to gain weight. Other lysine supplements never helped but this triple action one changed his life! He gained a pound and started wanting more types of foods again. He craves this powder and I may even switch him to a full wet food diet to give the powder to him even more. Life saver!! Have a baby with diarrhea, tummy troubles, weight loss? This vitamin is a must try!!!