---
product_id: 1865632
title: "Tomlyn Immune Support Daily L-Lysine Supplement, Fish-Flavored Lysine Powder for Cats and Kittens, 3.5oz"
brand: "tomlyn"
price: "₩63204"
currency: KRW
in_stock: true
reviews_count: 13
category: "Tomlyn"
url: https://www.desertcart.kr/products/1865632-tomlyn-immune-support-daily-l-lysine-supplement-fish-flavored-lysine
store_origin: KR
region: South Korea
---

# Irresistible Fish Flavor Boost 100% Vet-Formulated L-Lysine Supports Eye & Respiratory Health Tomlyn Immune Support Daily L-Lysine Supplement, Fish-Flavored Lysine Powder for Cats and Kittens, 3.5oz

**Brand:** tomlyn
**Price:** ₩63204
**Availability:** ✅ In Stock

## Summary

> 🐾 Elevate your cat’s health game with every scoop!

## Quick Answers

- **What is this?** Tomlyn Immune Support Daily L-Lysine Supplement, Fish-Flavored Lysine Powder for Cats and Kittens, 3.5oz by tomlyn
- **How much does it cost?** ₩63204 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/1865632-tomlyn-immune-support-daily-l-lysine-supplement-fish-flavored-lysine)

## 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

- • **Fast-Acting Relief:** Noticeable improvement in respiratory symptoms after just 2 feedings.
- • **Daily Defense Ritual:** Simple scoop dosing integrates seamlessly into your cat’s mealtime routine.
- • **Purrfectly Palatable:** Fish-flavored powder cats eagerly accept—no more pill battles.
- • **Vet-Trusted Immune Boost:** Clinically formulated since 1976 to fortify your cat’s natural defenses.
- • **Economical & Long-Lasting:** Small daily doses stretch a 3.5oz jar for weeks of immune support.

## Overview

Tomlyn Immune Support Daily L-Lysine Supplement is a vet-formulated, fish-flavored powder designed to support cats’ immune and respiratory health. Ideal for managing common feline issues like sneezing, watery eyes, and runny noses, it delivers fast, palatable relief that cats love. Trusted since 1976, this 3.5oz supplement offers an easy, daily dosing solution to keep your cat thriving.

## Description

desertcart.com : Tomlyn Immune Support Daily L-Lysine Supplement, Fish-Flavored Lysine Powder for Cats and Kittens, 3.5oz : Pet Antioxidant Nutritional Supplements : Pet Supplies

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 product and cats love it! - I like giving this supplement to my cats on a daily basis to reinforce their immune system, Specially to the stray cats that I feed daily.

## 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 | B00BERPOP4 |
| Active Ingredients | sodium acid |
| Allergen Information | Yam Free |
| Best Sellers Rank | #20,426 in Health & Household ( See Top 100 in Health & Household ) #23 in L-Lysine Nutritional Supplements |
| Brand | TOMLYN |
| Brand Name | TOMLYN |
| Customer Reviews | 4.6 out of 5 stars 5,420 Reviews |
| Flavor | Chicken and Fish |
| Global Trade Identification Number | 00030521033430 |
| Included Components | Key Features: Veterinarian formulated trusted since 1976 Supports a healthy immune system and normal eye health and function Tasty chicken and fish flavor |
| Item Form | Stick |
| Item Type Name | Tomlyn Immune Support L-Lysine Supplement Powder For Cats, 100G |
| Item Volume | 5 Liters |
| Item Weight | 0.4 Pounds |
| Manufacturer | Tomlyn |
| Manufacturer Part Number | 433343 |
| Model Number | 433343 |
| Number of Items | 1 |
| Specific Uses For Product | Active |
| Target Species | Cat |
| UPC | 787461623930 802677426493 030521033430 884290912973 884963632139 884985580777 |
| Unit Count | 3.5 Ounce |
| Volume | 5 Liters |
| Warranty Description | See Manufacturers Website |

## Product Details

- **Active Ingredients:** sodium acid
- **Brand:** TOMLYN
- **Flavor:** Chicken and Fish
- **Item Form:** Stick
- **Item Weight:** 6.4 ounces

## Images

![Tomlyn Immune Support Daily L-Lysine Supplement, Fish-Flavored Lysine Powder for Cats and Kittens, 3.5oz - Image 1](https://m.media-amazon.com/images/I/618x10XkYWL.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 product and cats love it!
*by C***S on June 7, 2026*

I like giving this supplement to my cats on a daily basis to reinforce their immune system, Specially to the stray cats that I feed daily.

### ⭐⭐⭐⭐⭐ 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.

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-07-14*