7 Best L-Lysine Supplements for Cats

Written by: Ejay C
A college graduate with a degree in Electrical Engineering, Ejay has a diverse background that combines technical expertise with a passion for pets and is now one of the content writers at IHD. Read more
| Published on August 2, 2023
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Every cat parent wants the best for their feline friend, and ensuring optimal health is a top priority. One way to support your cat’s health is through dietary supplementation with key nutrients, such as L-Lysine. L-Lysine, an essential amino acid, plays a significant role in maintaining a cat’s overall wellbeing, particularly in managing feline herpes virus, a common cause of respiratory issues in cats. In this article, we will explore the best L-Lysine supplements for cats, diving into their benefits, usage, and factors to consider when choosing the right supplement for your furry companion.

#1 – Vetoquinol Viralys L-Lysine Supplement for Cats – Cats & Kittens of All Ages – Immune Health – Sneezing, Runny Nose, Squinting, Watery Eyes – Flavored Lysine Powder

The Vetoquinol Viralys L-Lysine Supplement for Cats is a daily supplement that helps support a strong immune system and eye and respiratory health in cats and kittens of all ages. It is specially formulated to manage common feline health issues such as sneezing, runny nose, and watery, inflamed eyes. The supplement comes in a highly-palatable fish and poultry flavor and is easy to administer.

Best For: Cats & Kittens of All Ages – Immune Health – Sneezing, Runny Nose, Squinting, Watery Eyes – Flavored Lysine Powder






 


#2 – Vetoquinol Viralys Gel L-Lysine Supplement for Cats, 5oz – Cats & Kittens of All Ages – Immune Health – Sneezing, Runny Nose, Squinting, Watery Eyes – Palatable Maple Flavor Lysine Gel

The Vetoquinol Viralys Gel L-Lysine Supplement for Cats is a daily supplement that helps support a cat’s immune system and eye and respiratory health. It is specially formulated to manage common feline health issues such as sneezing, runny nose, and watery, inflamed eyes. The gel is highly palatable with a maple flavor, making it easy to administer to cats and kittens.

Best For: Immune health and managing feline health issues.






 


#3 – NOW Pet Health, L-Lysine Supplement, Powder, Formulated for Cats, NASC Certified, 8-Ounce

The NOW Pet Health L-Lysine Supplement Powder is formulated for cats and is designed to support a healthy immune system, respiratory health, and ocular health. It is recommended by renowned veterinarian Dr. Barbara Royal and is certified by the National Animal Supplement Council. NOW Pets is known for their attention to quality and detail, sourcing top-quality ingredients and conducting finished product testing.

Best For: Immune system support and overall cat health.






 


#4 – Pet Naturals Lysine for Cats, Chicken Flavor, 60 Chews – Immune and Respiratory Support for Cats – No Wheat or Corn – Vet Recommended

Pet Naturals Lysine for Cats is a chicken-flavored chew that supports immune and respiratory health in cats. Each soft chew contains 250mg of lysine, the optimal amount for maintaining cat health. It comes in a 60-day supply and is made with no wheat, corn, or artificial ingredients.

Best For: Immune and respiratory support for cats on a budget.






 


#5 – L-Lysine Supplement for Cats 4oz/120g – Cat Supplement for Sneezing and Runny Nose, Cat Cold, Cat Immune Support, Eye Function and Respiratory Health – Lysine Powder for Cats, Salmon Flavor

This L-Lysine supplement for cats is designed to support a strong immune system and promote respiratory health in cats. It can help alleviate symptoms such as sneezing, watery eyes, and runny noses. The easy-to-serve powder is made with natural ingredients and manufactured in FDA-registered facilities in the USA.

Best For: Cat immune support and respiratory health.






 


#6 – Vetoquinol Enisyl-F Oral Paste: L-Lysine Supplement for Cats – Tuna Flavor, 3.4oz (100mL) Pump

The Vetoquinol Enisyl-F Oral Paste is a L-Lysine supplement for cats that helps support a strong immune system and eye & respiratory health. It helps manage common feline health issues such as sneezing, runny nose, squinting, and watery, inflamed eyes. This paste delivers the veterinarian-recommended amount of Lysine and is easy to dose and administer.

Best For: Supporting immune system and eye & respiratory health in cats.






 


#7 – Under the Weather Pet L-lysine Powder Cat Supplement | Natural Vet Formulated Lysine Powders for Cats and Kittens | Promotes Balance Healthy Immune Support and Boost Overall Health Response (2.54 Oz)

The Under the Weather Pet L-lysine Powder Cat Supplement is an immune system booster for cats. It helps prevent infections and common feline illnesses by providing a boost of the essential amino acid L-lysine, which functions as natural antibodies. This easy-to-use powder supplement can be sprinkled onto a cat’s food and is made of ingredients like brewers yeast and mixed tocopherols.

Best For: Boosting the immune system of cats and promoting overall health.






 


What Are The Benefits of L-Lysine for Cats?

L-Lysine is an essential amino acid that offers several health benefits for cats:

  1. Helps Manage Feline Herpesvirus: One of the key benefits of L-Lysine is its role in managing feline herpesvirus-1 (FHV-1), a common virus in cats that can cause respiratory problems and conjunctivitis. L-Lysine interferes with the replication of the virus, thereby reducing the severity and frequency of outbreaks.
  2. Supports Immune Function: L-Lysine is known to support the immune system. It assists in the production of antibodies, hormones, and enzymes that enhance the body’s immune response, which is particularly beneficial for cats under stress or cats with weakened immune systems.
  3. Promotes Collagen Formation: L-Lysine is vital for collagen synthesis, a protein that helps maintain healthy skin, bones, and connective tissues.
  4. Aids in Calcium Absorption: This amino acid also aids in the absorption of calcium, promoting strong bones and teeth in cats.

While L-Lysine can provide these benefits, it’s important to consult with your veterinarian before introducing any supplements into your cat’s diet to ensure they are appropriate and safe for your pet’s specific needs.

 

What Should I Consider When Choosing a Lysine Supplement for My Cat?

When choosing a L-Lysine supplement for your cat, consider the following factors:

  1. Form of Supplement: L-Lysine supplements are available in various forms including powders, chews, gels, and capsules. Consider your cat’s preferences and lifestyle. Some cats might prefer chewable supplements, while others might find it easier to ingest a powder mixed into their food.
  2. Dosage: Look at the dosage of L-Lysine per serving. This can vary between products. Always follow the recommended dosage provided by the manufacturer and consult with your vet for guidance.
  3. Quality and Purity: Choose a product that is high-quality and free from harmful fillers or additives. Look for products that are manufactured in facilities that follow Good Manufacturing Practices (GMP).
  4. Flavor: If your cat is picky, the flavor of the supplement could be an important factor. Some products are flavored to make them more appealing to cats.
  5. Veterinarian Recommended: Supplements that are recommended by veterinarians often have a higher level of trust and reliability.
  6. Price and Value: Finally, consider the cost of the product and whether it offers good value for money. An expensive product is not necessarily better than a less costly one.

Remember, it’s always best to consult with your veterinarian before starting any new supplement in your cat’s diet. They can provide advice based on your cat’s specific needs and health condition.

 

Frequently Asked Questions About Lysine for Cats

  1. What is L-Lysine and why is it important for cats? L-Lysine is an essential amino acid, meaning it cannot be produced by the body and must be obtained through diet. It plays a key role in maintaining a cat’s overall wellbeing, especially in managing feline herpes virus, a common cause of respiratory issues in cats. It also aids in the production of antibodies, hormones, and enzymes, promoting immune health and supporting collagen synthesis for healthy skin, bones, and tissues.
  2. Can all cats benefit from L-Lysine supplements? While L-Lysine can offer certain health benefits, not all cats necessarily need this supplement. It’s particularly beneficial for cats suffering from feline herpes virus or those with weakened immune systems. Before starting any supplement, always consult your veterinarian to ensure it’s suitable for your cat’s specific health needs.
  3. What are the signs my cat might need L-Lysine? If your cat has frequent flare-ups of conjunctivitis or respiratory issues, especially if they’ve been diagnosed with feline herpesvirus, L-Lysine may be beneficial. However, it’s crucial to consult with your vet before starting any new supplement regimen, as these symptoms can also indicate other health issues.
  4. Are there any side effects associated with L-Lysine supplements? L-Lysine is generally safe for cats when used appropriately. However, like any supplement, excessive dosages can lead to potential side effects like gastrointestinal upset. Always adhere to the manufacturer’s dosage guidelines and consult with your vet.
  5. How do I administer L-Lysine to my cat? L-Lysine supplements come in various forms, including chews, gels, powders, and capsules. You can choose a form that your cat prefers and finds easiest to ingest. For instance, powders can be mixed into your cat’s food, while some cats may enjoy the taste of flavored chews.
  6. How long will it take to see results from giving my cat L-Lysine? The timeline for seeing results from L-Lysine supplementation can vary based on the individual cat and its specific health concerns. It’s important to continue regular veterinary check-ups to monitor your cat’s progress and health condition.
  7. Can I give my cat L-Lysine with other medications or supplements? It’s crucial to consult with your vet before mixing L-Lysine with other medications or supplements, as certain combinations may alter the effectiveness of the treatment or cause adverse reactions.
  8. Does L-Lysine cure feline herpesvirus? No, L-Lysine does not cure feline herpesvirus. However, it can help manage symptoms and reduce the severity and frequency of outbreaks by interfering with the replication of the virus.
  9. Is L-Lysine safe for kittens? Yes, L-Lysine is generally safe for kittens. However, the dosage may vary depending on their age and weight. Always consult your vet before starting a L-Lysine regimen with your kitten.
  10. What should I do if my cat refuses to take L-Lysine? If your cat refuses to take L-Lysine, you can try different forms of the supplement to see which one your cat prefers. If the refusal continues, consult with your vet for alternative solutions.

Conclusion: Best L-Lysine Supplements for Cats

Selecting the right L-Lysine supplement for your cat can be a daunting task, but with the right information, it doesn’t have to be. We’ve navigated through an ocean of options to provide you with the best supplements on the market, helping you make an informed choice that best suits your cat’s specific needs. However, it’s crucial to remember that while L-Lysine supplements can help support your cat’s health, they should never replace regular veterinary care. Always consult with your veterinarian before introducing any new supplement into your cat’s diet. By doing so, you can ensure that your feline friend receives the optimal care they need for a long, healthy, and vibrant life.

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