---
product_id: 645424510
title: "L-Lysine Gel for Cats - Immune System Support - Supplement Support for Healthy Tissue, Respiratory, and Vision - Salmon-Flavored - Made in The USA - 5 oz"
brand: "felisyl"
price: "€ 56.25"
currency: EUR
in_stock: true
reviews_count: 6
category: "Felisyl"
url: https://www.desertcart.gr/products/645424510-l-lysine-gel-for-cats-immune-system-support-supplement-support
store_origin: GR
region: Greece
---

# Salmon-flavored gel for easy dosing 1000mg L-Lysine per serving Made in USA, NASC certified L-Lysine Gel for Cats - Immune System Support - Supplement Support for Healthy Tissue, Respiratory, and Vision - Salmon-Flavored - Made in The USA - 5 oz

**Brand:** felisyl
**Price:** € 56.25
**Availability:** ✅ In Stock

## Summary

> 🐾 Elevate your cat’s health game with Felisyl — because your feline deserves the best!

## Quick Answers

- **What is this?** L-Lysine Gel for Cats - Immune System Support - Supplement Support for Healthy Tissue, Respiratory, and Vision - Salmon-Flavored - Made in The USA - 5 oz by felisyl
- **How much does it cost?** € 56.25 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/645424510-l-lysine-gel-for-cats-immune-system-support-supplement-support)

## Best For

- felisyl enthusiasts

## Why This Product

- Trusted felisyl brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Picky Eater Approved:** Smooth, salmon-flavored gel cats love—no more pill battles or forced dosing.
- • **Breathe & See Clearly:** Targets respiratory relief and eye health to reduce sneezing, congestion, and watery eyes.
- • **Quality You Can Count On:** NASC certified and proudly made in the USA for purity, safety, and consistent results.
- • **Vet-Formulated & Trusted:** Created by veterinarians for safe, daily use across all cat life stages with proven bioavailability.
- • **Immune Boosting Powerhouse:** Premium L-Lysine supports robust immune defense against FHV-1 flare-ups and seasonal stress.

## Overview

Felisyl L-Lysine Gel is a premium, vet-formulated supplement delivering 1000mg of L-Lysine per serving to support your cat’s immune system, respiratory function, and eye health. This salmon-flavored gel ensures easy, stress-free dosing for cats of all ages. Manufactured in the USA under NASC certification, Felisyl offers a trusted, high-quality solution to help your cat thrive through seasonal challenges and common feline health issues.

## Description

Unlock the secret to your cat's vitality with Felisyl L-Lysine Gel. Specially formulated to enhance your feline friend's immune health and respiratory function, this premium cat supplement offers the key benefits your pet deserves. Our gel is meticulously crafted with the power of L-Lysine, an essential amino acid that supports your cat's overall well-being. With Felisyl L-Lysine Gel, you're providing more than just a supplement; you're offering the gift of robust health. Watch as your cat's immune system thrives, making them more resilient to common challenges. Breathing becomes easier as respiratory function is optimized, letting your cat enjoy every moment to the fullest. Ensure your beloved companion's longevity and well-being with our expertly formulated gel. Whether you have a young and energetic kitten or a wise and mature cat, the benefits of Felisyl L-Lysine Gel span all life stages. It's the secret ingredient to keeping your feline friend feeling their best, no matter their age. Elevate your cat's life with Felisyl L-Lysine Gel – the ultimate way to show your care and commitment. Embrace a future of shared adventures, endless cuddles, and vibrant well-being. Your cat deserves the best, and Felisyl is here to provide it.

Review: non of my cats liked it - my cats didn't like it, even stray cat didn't like. I mixed it with their favorite creamy treats but still they didn't touch it
Review: So far, I am pleased with this Lysine gel for my Ragdoll Kitty. I got it because my kitty was suffering from red, irritated eyes with an occasional sniffle / sneeze. I decided to try and treat this internally rather than dealing with eye drops for this problem in her eyes since it would cause her stress and it is topical so the problem would probably continue without keeping that daily regimen up. I needed something systemic and more favorable to my kitty and she is treats and food driven. I was concerned a bit with some of the reviews dealing with quality control and I am happy to say that all is perfect. It smells great, and my cat loves it. She goes for it with the gusto of eating a Churu. She has only had several doses, but I can already see improvement in the redness in the whites of her eyes. I am so happy. Happy cat, happy life. I started on the minimum dose of 1/8th tsp twice a day and I wait to give it to her on a full stomach to avoid some of the digestive upset that can occur as a side effect. The amount you get in the tube is very affordable compared to others in oral drops or other powders and gels that are super expensive on dosing average. I also felt confident to purchase Felisyl due to it receiving the seal of approval from the NASC and believe it or not, during my research of Lysine products, it is even recognized under Good RX for its health benefits and prevention maintenance for my beloved feline along with several other vet formulated lysine products, but they were double to triple the purchase price. Very happy with my decision and hoping she continues to improve in her health, allergies and keeping her immune system well and strong. This product is so much cheaper than a Vet bill or repeat visits because the symptoms are only treated instead of trying to clear the underlying condition that this gel or more like a paste actually does for her internally and systemically. Allergies begone.

## Features

- Immune System Support with L-Lysine – Powered by premium L-Lysine for cats, an essential amino acid that supports immune function and helps maintain healthy antibody levels. Ideal for cats and kittens prone to feline herpes virus (FHV-1) flare-ups, seasonal stress, or general immune challenges.
- Respiratory & Eye Health Relief – Helps ease cat sneezing, runny nose, congestion, and watery eyes associated with common upper respiratory issues in cats. Supports clear breathing, eye comfort, and overall wellness—perfect for cats needing gentle respiratory support or allergy relief.
- Tasty, Easy-to-Give Lysine Gel for Cats – A smooth, salmon-flavored lysine gel for cats that most cats lick up willingly. No more pill struggles—just place the gel on your cat’s paw, nose, or dish for effortless daily dosing. Great for picky eaters and kittens.
- Vet-Formulated & Recommended – Created by veterinarians to deliver targeted immune, respiratory, and eye health support in a highly bioavailable L-Lysine gel for cats. Safe for daily use in kittens, adults, and senior cats. Trusted by pet parents and designed for real results.
- NASC Certified Quality – Made in the USA – Manufactured under rigorous NASC standards for purity and safety. This high-quality cat lysine gel is proudly made in the USA, ensuring consistency and peace of mind with every dose.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00MO9SHBE |
| Allergen Information | Codfish Free |
| Batteries Included | No |
| Best Sellers Rank | #37,482 in Pet Supplies ( See Top 100 in Pet Supplies ) #796 in Cat Health Supplies |
| Care instructions | This product is intended for intermittent or supplemental feeding only. Individual results may vary. For animal use only. Do not use if product appears to be tampered with or seal is broken, Store product in cool, dry place, Avoid temperatures above 86° F. |
| Color | Paste |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,734) |
| Date First Available | 29 July 2019 |
| Flavor | Gel (5 oz.) |
| Item Form | Gel |
| Item Weight | 18 g |
| Item model number | FEL6547 |
| Number of Items | 1 |
| Pet Life Stage | All Life Stages |
| Pet Type | Cat, Dogs, Horse |
| Product Dimensions | 20.32 x 7.62 x 5.08 cm; 18 g |
| Quantity | 1 |
| Size | 1 Pack |
| Specific Uses | Active |
| Storage Information | Store product in cool, dry place. Avoid temperatures above 86°F. |
| Volume | 5 Fluid Ounces |
| batteries required | No |

## Product Details

- **Active Ingredients:** L-Lysine Monohydrochloride
- **Brand:** Felisyl
- **Flavour:** Gel (5 oz.)
- **Item form:** Gel

## Images

![L-Lysine Gel for Cats - Immune System Support - Supplement Support for Healthy Tissue, Respiratory, and Vision - Salmon-Flavored - Made in The USA - 5 oz - Image 1](https://m.media-amazon.com/images/I/61B+fxs0M+L.jpg)

## Customer Reviews

### ⭐⭐ non of my cats liked it
*by H***I on 21 January 2025*

my cats didn't like it, even stray cat didn't like. I mixed it with their favorite creamy treats but still they didn't touch it

### ⭐⭐⭐⭐⭐ Review
*by K***E on 5 January 2026*

So far, I am pleased with this Lysine gel for my Ragdoll Kitty. I got it because my kitty was suffering from red, irritated eyes with an occasional sniffle / sneeze. I decided to try and treat this internally rather than dealing with eye drops for this problem in her eyes since it would cause her stress and it is topical so the problem would probably continue without keeping that daily regimen up. I needed something systemic and more favorable to my kitty and she is treats and food driven. I was concerned a bit with some of the reviews dealing with quality control and I am happy to say that all is perfect. It smells great, and my cat loves it. She goes for it with the gusto of eating a Churu. She has only had several doses, but I can already see improvement in the redness in the whites of her eyes. I am so happy. Happy cat, happy life. I started on the minimum dose of 1/8th tsp twice a day and I wait to give it to her on a full stomach to avoid some of the digestive upset that can occur as a side effect. The amount you get in the tube is very affordable compared to others in oral drops or other powders and gels that are super expensive on dosing average. I also felt confident to purchase Felisyl due to it receiving the seal of approval from the NASC and believe it or not, during my research of Lysine products, it is even recognized under Good RX for its health benefits and prevention maintenance for my beloved feline along with several other vet formulated lysine products, but they were double to triple the purchase price. Very happy with my decision and hoping she continues to improve in her health, allergies and keeping her immune system well and strong. This product is so much cheaper than a Vet bill or repeat visits because the symptoms are only treated instead of trying to clear the underlying condition that this gel or more like a paste actually does for her internally and systemically. Allergies begone.

### ⭐⭐⭐⭐⭐ Review
*by M***N on 11 December 2025*

Cats take it with no problem. I bought this to replace the expensive product ($ 45 !!) that the vet supplied previously. The Felisyl Gel has a higher Lysine concentration than the vet supplied product too. My cats get Churu treats (3) times a day (yes, I know, my boys are spoiled) and I've mixed this product with the Churu treats and given them the Felisyl without mixing with the Churu treats, they take it either way. L-Lysine really seems to clear up their respiratory problems like sneezing, runny eyes, etc. It really does have lab tested proven benefits for cats, so I'm going to keep them on it.

## Frequently Bought Together

- Felisyl L-Lysine Gel for Cats (5oz) – Supports Immune, Respiratory, and Eye Health. Eases Sneezing, Runny Nose, and Watery Eyes. Tasty Salmon Flavor - Made in The USA
- HomeoPet Feline Nose Relief, Safe and Natural Nasal and Sinus Supplement for Cats, 15 Milliliters
- VAZULI Pet Eye Health Ointment for Dogs, Cats, Cattle, Sheep, Horses, Birds and Puppies, Kittens 1/8 oz /3.5gr - 1 Tube

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.gr/products/645424510-l-lysine-gel-for-cats-immune-system-support-supplement-support](https://www.desertcart.gr/products/645424510-l-lysine-gel-for-cats-immune-system-support-supplement-support)

---

*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-02*