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The Benefits of Lysine for Cats

The Benefits of Lysine for Cats

Lysine is an essential amino acid that goes by various different names, including L-lysine Hydrochloride. There are various different benefits of Lysine for cats, including serving as a building block for protein, which plays a key role in carrying out many different bodily functions.

Lysine can be given as a supplement to both humans and their pets. In humans, it is often used to treat cold sores because it seems to stop the herpes virus from growing.

The Role of Lysine in Cats

Lysine helps pets produce antibodies and enzymes that support the immune system. It is also helpful for calcium absorption, which supports strong bones, and it helps promote healthy skin.

It is important to note that a cat’s body does not make Lysine on its own, but it’s still essential for a cat’s overall health. Therefore, cats should receive outside sources of this amino acid through food and dietary supplementation. Supplementing your cat’s diet with Lysine doesn’t have to be difficult. It is available in pill, liquid, and powder form. Plus many cat treats include it in their ingredients. Your feline friend will enjoy the tasty treat, and you will enjoy knowing that it’s good for her.

Veterinarians often use Lysine to help with various ailments, including viral infections and feline herpes virus (or feline herpesvirus).

Feline Herpes Virus

Feline herpes virus type 1 (FHV-1) is a very common feline pathogen. It can cause severe upper respiratory disease, conjunctivitis, and ocular disease, especially in kittens. Many cats are exposed to feline herpes virus, but they may never show symptoms. Some cats may show symptoms similar to that of a human cold.

An infected cat may show a variety of signs: sneezing, nasal congestion, lethargy, lack of appetite, and a runny nose or eyes. Severe cases are sometimes treated with antiviral medications, and secondary bacterial infections often require an antibiotic. Eye drops or creams may be used to help with conjunctivitis or other eye irritations.

Once a cat is infected with the illness, the body can’t ever completely get rid of it. Some cats develop a chronic condition and experience flare-ups throughout their life. Stressful situations often weaken the immune system, which can give the virus an opportunity to take over. It’s best to consult your veterinarian if your cat is showing signs of feline herpes virus.

Lysine Benefits for Feline Herpes Virus

According to a study by Fascetti et al., oral administration of Lysine to cats that are infected with FHV-1 is associated with a significant reduction in the severity of clinical signs and basal viral shedding. VCA Animal Hospitals agrees and says “there is anecdotal evidence that Lysine works to suppress the symptoms of feline herpes virus.” Plus, they assure that side effects are uncommon, especially if the supplement is mixed with food.

It is believed that Lysine halts the replication of the virus by interfering with another amino acid called arginine, which the virus needs in order to replicate.

Veterinarians may also use this amino acid to help reduce symptoms of upper respiratory infections and conjunctivitis if it is associated with the herpes virus.

Felo Lysine for Cats

At Thomas Labs®, we understand that no one likes feeling under the weather, including our cats. That’s why we developed Felo Lysine from Thomas Pet, an oral Lysine supplement for cats that helps support the immune system when your cat needs it the most.

This Lysine powder for cats helps promote the production of antibodies and enzymes to support the immune system, plus it helps promote healthy eye function and respiratory health. This supplement works hard to get your feline friend back on all four paws. With continued administration, this supplement helps support a healthy, happy cat.

If your cat is showing respiratory symptoms, you may want to consider using an herbal supplement like Respiratory Remedy to help maintain healthy respiratory function and immune support in your cat. This supplement contains a proprietary blend of herbs to support the respiratory system during times of occasional stress.

Now that you’ve learned more about the benefits of Lysine for cats, consider the benefits it could provide to your furry friend. You’ll be glad you did!


The materials and information provided on this website are not intended to replace the medical advice or services of your veterinarian or other pet healthcare professional. Consult your own veterinarian if you have medical questions concerning diagnosis, treatment, therapy, or medical attention.

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