--- product_id: 35570276 title: "Immune Support Daily L-Lysine Supplement, Fish-Flavored Lysine Powder for Cats and Kittens, 4 Pack" brand: "tomlyn" price: "R3598" currency: ZAR in_stock: true reviews_count: 13 category: "Tomlyn" url: https://www.desertcart.co.za/products/35570276-immune-support-daily-l-lysine-supplement-fish-flavored-lysine-powder store_origin: ZA region: South Africa --- # palatable fish-flavored formula 4-pack vet-quality L-Lysine powder supports normal eye & respiratory health Immune Support Daily L-Lysine Supplement, Fish-Flavored Lysine Powder for Cats and Kittens, 4 Pack **Brand:** tomlyn **Price:** R3598 **Availability:** βœ… In Stock ## Summary > 🐾 Keep your cat thriving with every scoop β€” because their health deserves the best! ## Quick Answers - **What is this?** Immune Support Daily L-Lysine Supplement, Fish-Flavored Lysine Powder for Cats and Kittens, 4 Pack by tomlyn - **How much does it cost?** R3598 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/35570276-immune-support-daily-l-lysine-supplement-fish-flavored-lysine-powder) ## Best For - tomlyn enthusiasts ## Why This Product - Trusted tomlyn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Easy Daily Dose:** Simple scoop-and-sprinkle design ensures hassle-free administration with every meal. - β€’ **Flavor Cats Crave:** Fish-flavored powder that transforms daily supplements into irresistible mealtime treats. - β€’ **Value-Packed 4-Pack:** Long-lasting supply designed for multi-cat households or ongoing immune maintenance. - β€’ **Vet-Grade Immune Boost:** Clinically formulated L-Lysine powder trusted by veterinarians for robust feline immune support. - β€’ **Targeted Respiratory Relief:** Helps manage sneezing, watery eyes, and runny noses for healthier, happier cats. ## Overview Tomlyn Immune Support Daily L-Lysine Supplement is a vet-quality, fish-flavored powder designed to support cats' immune and respiratory health. Ideal for managing common feline issues like sneezing and watery eyes, this easy-to-dose supplement comes in a convenient 4-pack, making it perfect for sustained use in multi-cat homes. Loved by cats and trusted by professionals, it’s a must-have for proactive pet parents. ## Description Our story began when an entrepreneurial veterinarian, Tom, and his wife, Lyn, decided to create a line of nutritional supplements, dermatological treatments and shampoos for dogs and cats that would outperform everything else available. They created Tomlyn. Today, Tomlyn is backed by Vetoquinol, an independent, family-owned business operating worldwide and focused exclusively on products for animals. Nutritional Support Gel Visit the Store Nutritional Support Gel Visit the Store Hairball Care Visit the Store Hairball Care Pets Will Think it's a Treat! Visit the Store Pets Will Think it's a Treat! Review: Amazing! - GREAT!! Having tried other brands, this is my number #1 choice when I have sick, feral cats in my colonies. I feed close to 27, TNR'd cats in multiple locations & when they show up w weepy eyes, sneezing &/or signs of upper respiratory distress, I mix this in w wet food, adding a little warm water. The results have been amazing! Usually, I see results after the 2nd feeding. I just had a very sick male, I think he may have FIV but a URI was hitting him hard, he had stopped eating because he couldn't smell through the nose congestion.. I used sardines mixed w canned, tuna cat food & a little warm water w this Lysine mixed in.. he was in bad shape but the smell was enough to trigger him to eat & by day 3, he was remarkably improved, he's almost back to himself again. -- For feral colonies, this is perfect to help their immune systems! Not much is used each time so it lasts a while, a good value for the price. -- I use it regularly now for all the outdoor cats, I do recommend adding it to wet food w a little water so it dissolves. Trust me, this stuff is great for URI & weepy eye issues! Review: Great stuff for feline herpes; plus, a cautionary tale and a solution to a problem - I purchased this as a replacement for another brand (Viralys) that I had been getting through my vet. One of our kitties had a "cold" when we adopted her. That "cold" just wouldn't clear up. She had a weepy eye and sneezles for weeks. When we took her to the vet, the vet said it was kitty herpes and prescribed the Viralys (at $30 a container). It's l-lysine in powder form; you sprinkle it on the cat food. There is no cure for feline herpes, but l-lysine helps clear up the symptoms. (For those who want to know how l-lysine helps, The Cat Doctor & Friends in Santa Clarita says, "We use L-Lysine to fool your cat's herpes virus into self-destructing by using L-Lysine, instead of another amino acid Arginine, when making new copies of itself. This decreases the amount of herpes virus in your cat's body and hopefully eliminates clinical signs such as sneezing or squinting one eye and reddish brown discharge. Green or yellow discharge from your cat's eye or nose is probably not feline herpes and deserves a veterinary visit.") The Viralys l-lysine powder not only worked great, clearing up the weepy eye and drippy nose within a remarkably short amount of time, it was also loved by all our kitties. (The vet said it wouldn't hurt any of them to eat it.) However, at $30 a container, and with the stupid mistake I made that wasted half a container (see below), I wanted to find a less expensive alternative. And I did. This product, the Tomlyn Scientifics l-lysine, seems to be identical to the Viralys, and costs half what my vet was charging me. My one concern was whether it would taste as good to the kitties, and it does indeed seem to. == My Stupid Mistake and How You Can Avoid It == When I first got the Viralys from my vet, I made a stupid mistake. I used the little scoop that comes with the powder to sprinkle the lysine powder on the cat food, and then I used the scoop to stir the powder into the food. Then I returned the scoop to the container. Those of you who are familiar with good sanitation practices will be able to predict what happened next: after a while, the tiny crumbs of cat food I had inadvertently transferred to the container gave birth to new life. In a few weeks, I saw suspicious little clumps and balls in the powder. I threw out the rest of the powder rather than risk making my kitties sick. After thinking about what I could do to prevent wasting my kitties' medicine (and my money), I realized the solution: put the powder into a shaker container so it never gets contaminated. After shopping around, I purchased the Kaiser Bakeware La Forme Select Sugar/Spice Shaker Set (available here on desertcart), which is just the right size for the powder. I'm using the shaker lid with the largest holes. Now all is well. ## Features - L-Lysine supplement for cats; supports normal eye function, respiratory health, strong immune system - Helps manage common feline health issues; sneezing, runny nose, squinting and watery, inflamed eyes - One to two scoops daily provides support for the immune and respiratory system for kittens and cats - Our vet-quality L-Lysine powder provides immune support for respiratory issues for as long as needed - Cats love our tasty, palatable fish-flavored powder; easy to dose and administer, simply add to food ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01BNWB3BI | | Active Ingredients | sodium acid | | Allergen Information | Soy | | Best Sellers Rank | #25,096 in Health & Household ( See Top 100 in Health & Household ) #25 in L-Lysine Nutritional Supplements | | Brand | TOMLYN | | Brand Name | TOMLYN | | Customer Reviews | 4.6 out of 5 stars 5,415 Reviews | | Flavor | Fish | | Included Components | sodium acid | | Item Form | Powder | | Item Weight | 1.5 Pounds | | Manufacturer | Tomlyn | | Manufacturer Part Number | 75403343 | | Model Number | 433343 | | Number of Items | 4 | | Product Benefits | Eye Health | | Specific Uses For Product | Active | | Target Species | Cat | | UPC | 030521033430 | | Unit Count | 4.00 Count | | Warranty Description | See Manufacturers Website | ## Product Details - **Active Ingredients:** sodium acid - **Brand:** TOMLYN - **Flavor:** Fish - **Item Form:** Powder - **Item Weight:** 1.46 Pounds ## Images ![Immune Support Daily L-Lysine Supplement, Fish-Flavored Lysine Powder for Cats and Kittens, 4 Pack - Image 1](https://m.media-amazon.com/images/I/61Q-EGg7UfL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: I don't feed my cats canned food. Will this work on dry food? If so, how do you do it? Do you wet it at all?** A: This product will work well when added to canned food. Cats should Never be fed dry food only. Dry food does not contain enough water to maintain a cat's health. Dry food is made for people and not cats. It is made to be convenient. Cats are desert animals and will not drink enough water on their own. Cats need all the water you can get into them, to avoid long term health problems such as diabetes and the dreaded kidney disease. Canned food is more like the prey cats would eat in the wild and has enough water to maintain the cat's health. I also add water to the canned food. Complete info on this can be found on the Cat Info website, written by Lisa Pierson DVM. **Q: Approximately how many servings are in a container?** A: Depends on the size of your serving. The recommended dose for adult cats is 1000 mg. per day (2 scoops) so...that would be 100 days (2 servings/day) per container. I however, give 1/2 that amount to my cats very successfully. 500 mg.(1 scoop) which means there are 200 doses (servings)or 200 days per container. **Q: Can this product be added to water?** A: I cut up can food and add a little warm water to make a gravy. I sprinkle the Lysine powder on food and wet it with gravy. My vet said a little extra water is good for cats. They love it. I have not used this product with plain water. **Q: Where is this product made? Is any part of it made in China, or does any part come from China?** A: No part comes from China - except maybe the container. You can compare this product to the one offered by vets under the name "Viralys" by Vetoquinol, an acquired Company of Tomlyn Products. The only difference: THE PRICE at my vet is $ 39.--. Both are made in Canada. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Amazing! *by J***. on April 15, 2026* GREAT!! Having tried other brands, this is my number #1 choice when I have sick, feral cats in my colonies. I feed close to 27, TNR'd cats in multiple locations & when they show up w weepy eyes, sneezing &/or signs of upper respiratory distress, I mix this in w wet food, adding a little warm water. The results have been amazing! Usually, I see results after the 2nd feeding. I just had a very sick male, I think he may have FIV but a URI was hitting him hard, he had stopped eating because he couldn't smell through the nose congestion.. I used sardines mixed w canned, tuna cat food & a little warm water w this Lysine mixed in.. he was in bad shape but the smell was enough to trigger him to eat & by day 3, he was remarkably improved, he's almost back to himself again. -- For feral colonies, this is perfect to help their immune systems! Not much is used each time so it lasts a while, a good value for the price. -- I use it regularly now for all the outdoor cats, I do recommend adding it to wet food w a little water so it dissolves. Trust me, this stuff is great for URI & weepy eye issues! ### ⭐⭐⭐⭐⭐ Great stuff for feline herpes; plus, a cautionary tale and a solution to a problem *by M***S on November 18, 2014* I purchased this as a replacement for another brand (Viralys) that I had been getting through my vet. One of our kitties had a "cold" when we adopted her. That "cold" just wouldn't clear up. She had a weepy eye and sneezles for weeks. When we took her to the vet, the vet said it was kitty herpes and prescribed the Viralys (at $30 a container). It's l-lysine in powder form; you sprinkle it on the cat food. There is no cure for feline herpes, but l-lysine helps clear up the symptoms. (For those who want to know how l-lysine helps, The Cat Doctor & Friends in Santa Clarita says, "We use L-Lysine to fool your cat's herpes virus into self-destructing by using L-Lysine, instead of another amino acid Arginine, when making new copies of itself. This decreases the amount of herpes virus in your cat's body and hopefully eliminates clinical signs such as sneezing or squinting one eye and reddish brown discharge. Green or yellow discharge from your cat's eye or nose is probably not feline herpes and deserves a veterinary visit.") The Viralys l-lysine powder not only worked great, clearing up the weepy eye and drippy nose within a remarkably short amount of time, it was also loved by all our kitties. (The vet said it wouldn't hurt any of them to eat it.) However, at $30 a container, and with the stupid mistake I made that wasted half a container (see below), I wanted to find a less expensive alternative. And I did. This product, the Tomlyn Scientifics l-lysine, seems to be identical to the Viralys, and costs half what my vet was charging me. My one concern was whether it would taste as good to the kitties, and it does indeed seem to. == My Stupid Mistake and How You Can Avoid It == When I first got the Viralys from my vet, I made a stupid mistake. I used the little scoop that comes with the powder to sprinkle the lysine powder on the cat food, and then I used the scoop to stir the powder into the food. Then I returned the scoop to the container. Those of you who are familiar with good sanitation practices will be able to predict what happened next: after a while, the tiny crumbs of cat food I had inadvertently transferred to the container gave birth to new life. In a few weeks, I saw suspicious little clumps and balls in the powder. I threw out the rest of the powder rather than risk making my kitties sick. After thinking about what I could do to prevent wasting my kitties' medicine (and my money), I realized the solution: put the powder into a shaker container so it never gets contaminated. After shopping around, I purchased the Kaiser Bakeware La Forme Select Sugar/Spice Shaker Set (available here on Amazon), which is just the right size for the powder. I'm using the shaker lid with the largest holes. Now all is well. ### ⭐⭐⭐⭐⭐ Support for feline immune system in a multicat household *by A***R on February 8, 2026* We have a three cat household, and it's important to us that all three cats stay healthy. Lysine is a good supplement to support immune function in felines, and all three of our roommates get a good slosh of this stuff with every meal. NOne of them have ever balked at the taste or texture, and they gobble up all their food. They've stayed healthy and feisty and very much themselves, and what could be better? Check with your vet, but lysine has been very good for our household. ## Frequently Bought Together - Tomlyn Immune Support Daily L-Lysine Supplement, Fish-Flavored Lysine Powder for Cats and Kittens, 4 Pack - Purina Pro Plan Veterinary Supplements FortiFlora Cat Probiotic Supplement for Cats with Diarrhea - 30 ct. 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