The 25 Best L-Lysine for Cats of 2020

0
26
L-Lysine For Cats

An essential amino acid, l-lysine is a major building block of protein that must be obtained through the diet. It supports the immune system, promotes collagen growth, helps the body to absorb other nutrients, and plays a part in producing enzymes and antibodies. L-Lysine is often prescribed for cats who are showing signs of feline herpes virus type 1, presenting with symptoms similar to the human cold. Use of the supplement is in great debate as to whether or not it’s necessary, so consult with your veterinarian before giving your cat l-lysine.

We reviewed dozens of l-lysine supplements for cats. We checked out powders, gels, chews, and pastes. Furthermore, we looked at the varying lysine amounts available in one serving, and because we know how finicky cats can be, we considered the palatability of each supplement as well.

Best L-Lysine for Cats Overall

Vetoquinol Viralys L-Lysine Supplement – Powder

Vetoquinol Viralys L-Lysine Supplement – PowderFlavored with fish and poultry to entice your cat, this l-lysine supplement comes in a powder so you can easily add it to your cat’s food.

Buy on Amazon

We chose Vetoquinol Viralys L-Lysine Supplement – Powder as our favorite overall pick. The powder form is easy to give to your cat, and each scoop contains half the recommended amount of l-lysine.

The 5 Top-Rated L-Lysine for Cats

Editor’s PicksBrandRating
Best OverallVetoquinol Viralys L-Lysine Supplement – Powder4.6
Best L-Lysine Chews for CatsVetriScience Laboratories Vetri Lysine Plus4.1
Best Budget BuyNOW Pet Health L-Lysine Supplement4.5
Best L-Lysine Gel for CatsVetoquinol Viralys Gel L-Lysine Supplement4.4
Best L-Lysine Powder for CatsTomlyn Daily L-Lysine Supplement
4.5

*Ratings are from Amazon at the time of publication and can change

Best L-Lysine for Cats Overall: Vetoquinol Viralys L-Lysine Supplement – Powder

For the best overall l-lysine supplement for cats, we chose Vetoquinol Viralys L-Lysine Supplement – Powder. Manufactured in North America using pharmaceutical guidelines, this l-lysine supplement is also certified by the National Animal Supplement Council, which means it has passed an independent quality audit. It’s also recommended by veterinarians.

The powder form is easy to administer to your cat – just sprinkle it on his food. The fish and poultry flavor is sure to pass your cat’s taste test, making this an easy way to boost his immune system. The ingredient list is simple and short, so you don’t have to worry about any weird additives. Each scoop contains 500 mg of lysine, which is half the recommended dose. Cats six months and older should get one scoop twice a day, while kittens can receive half of one scoop twice a day, unless otherwise directed by your veterinarian.

Vetoquinol Viralys may help with sneezing, squinting, eye discharge, runny nose, and congestion. Hundreds of customers claim it has helped clear up runny noses, crusty eyes, congestion, and upper respiratory problems in their cats.

Vetoquinol Viralys L-Lysine Supplement – Powder Key Features:

  • Each scoop is 500 mg of lysine
  • National Animal Supplement Council seal of approval
  • Recommended by veterinarians
  • 3.5 ounce container
  • Suitable for cats of all ages

Best L-Lysine Chews for Cats: VetriScience Laboratories Vetri Lysine Plus

Best L-Lysine Chews for Cats

VetriScience Laboratories Vetri Lysine Plus

VetriScience Laboratories Vetri Lysine PlusVetriScience l-lysine chews contain both l-lysine and dimethylglycine, supporting both the immune system and hormones.

Buy on Amazon

The best l-lysine chews for cats is VetriScience Laboratories Vetri Lysine Plus, which is formulated and manufactured in the USA. These chews offer 125 mg of lysine per chew, as well as 25 mg of dimethylglycine. Dimethylglycine is a derivative of another amino acid that also helps boost the immune system, as well as balance hormones and manage seizures. Supporting the immune system may help reduce your cat’s chance of contracting respiratory issues. VetriScience l-lyine chews may also help support collagen formation, tissue repair, antioxidant and antibody production.

Each bag holds 120 chews, giving you roughly a month of l-lysine for your cat. With a chicken liver flavor, these chews can be used as treats for your kitty, so long as you don’t go over the recommended amount. They’re designed for cats of all ages and sizes, but check with your veterinarian first. Hundreds of customers recommend these chews, though some advise breaking the chews in to smaller pieces if they are too big for your cat.

VetriScience Laboratories Vetri Lysine Plus Key Features:

  • Formulated and recommended by veterinarians
  • Chicken liver flavor
  • Manufactured in the USA
  • For cats and kittens
  • 120 chews per bag
  • Two chews contain 250 mg

Best Budget L-Lysine for Cats: NOW Pet Health L-Lysine Supplement

Best Budget L-Lysine for Cats

NOW Pet Health L-Lysine Supplement

NOW Pet Health L-Lysine SupplementNOW Pet Health l-lysine supplement contains no additives or flavoring agents, so your cat gets pure lysine in this 8-ounce bottle.

Buy on Amazon

If budget is a concern, save a few bucks with our budget pick, NOW Pet Health L-Lysine Supplement. It’s certified by the National Animal Supplement Council, and is veterinarian recommended. NOW Pet Health l-lysine comes in a powder form, and contains 276 mg of lysine in one-eighth of a teaspoon. Since there are no added fillers, preservatives, or other ingredients, this powder is tasteless and should blend easily with your cat’s food.

This l-lysine supplement is good for cats of all ages and sizes, and may help support the immune system, respiratory system, and eye health. Consult with your veterinarian before administering to your kitty. Many customers recommend this product for helping with respiratory symptoms, such as sneezing, runny nose, and watery eyes.

NOW Pet Health L-Lysine Supplement Key Features:

  • Certified by the National Animal Supplement Council
  • Veterinarian recommended
  • Add to your cat’s meal
  • No added flavors or fillers
  • 276 mg of lysine per serving

Best L-Lysine Gel for Cats: Vetoquinol Viralys Gel L-Lysine Supplement

Best L-Lysine Gel for Cats

Vetoquinol Viralys Gel L-Lysine Supplement

Vetoquinol Viralys Gel L-Lysine SupplementMade specifically for cats, this l-lysine supplement comes in gel form, and is flavored with maple to appeal to your cat.

Buy on Amazon

We found the best l-lysine gel for cats is Vetoquinol Viralys Gel L-Lysine Supplement. It’s approved by the National Animal Supplement Council. Made for cats of all ages, a half teaspoon of this product has 500 mg of lysine. And since it comes in a maple flavor, cats find it palatable. Introduce your kitty to the gel by placing some on his nose or paw, so he can lick it off. Once he has no issues with it, you can use a spoon or syringe to give him the supplement.

If your kitty is showing signs of respiratory health issues, be sure to see your veterinarian. Once you have determined that l-lysine is the way to go, this maple gel may help ease the symptoms of nasal congestion, watery eyes, runny nose, sneezing, and squinting. The gel comes in a convenient 5-ounce squeezable container, so it’s easy to give to your cat. Hundreds of customers recommend this product.

Vetoquinol Viralys Gel L-Lysine Supplement Key Features:

  • 250 mg of lysine per 1.25 mL
  • Approved by the National Animal Supplement Council
  • Veterinarian recommended
  • Convenient 5-ounce squeeze tube

Best L-Lysine Powder for Cats: Tomlyn Daily L-Lysine Supplement

Best L-Lysine Powder for Cats

Tomlyn Daily L-Lysine Supplement

Tomlyn Daily L-Lysine SupplementGood for cats of all ages, this l-lysine powder is fish flavored, and comes in a 3.5 ounce container, yielding more than 100 servings.

Buy on Amazon

Aside from our overall choice, the best powder l-lysine supplement for cats is Tomlyn Daily L-Lysine Supplement. It has the seal of approval from the third-party company that audits animal supplements, the National Animal Supplement Council. Formulated by veterinarians for cats of all ages, this powder offers a chicken and fish flavor that is sure to please your kitty. Since it comes in a powder form, it’s easy to give to your cat – just sprinkle it on top of his food. Each scoop, which is included, has 500 mg of lysine.

Tomlyn Daily l-lysine has a limited ingredient list, so this 3.5 ounce container has more than 100 servings of lysine. This supplement may help support respiratory and eye health, and manage symptoms such as sneezing, runny nose, watery eyes, congestion, eye discharge, and squinting. Many customers recommend this powder for adding lysine to your cat’s diet.

Tomlyn Daily L-Lysine Supplement Key Features:

  • Approved by the National Animal Supplement Council
  • Veterinarian recommended
  • Each scoop equals 500 mg of lysine
  • Must be given with meals

Who Should Buy L-Lysine for a Cat

Veterinarians typically prescribe l-lysine for cats that have an upper respiratory problem or feline herpes virus type 1, or FHV-1. Sometimes it’s prescribed as a preventative in multiple-cat households to keep contagious viruses at bay. L-lysine has been noted to help reduce symptoms such as sneezing, runny nose, congestion, and eye discharge.

A study in 2003 showed that orally administered l-lysine reduced viral shedding and clinical symptoms of FHV-1. However, a meta-analysis in 2016 concluded that giving l-lysine to cats was not only unnecessary, but potentially harmful. Other veterinarians stand behind the anecdotal evidence of their customers claiming their cats get better when taking l-lysine. We advise you to do your due diligence when determining if this supplement is right for your cat.

Best L-Lysine for Cats Overall

Vetoquinol Viralys L-Lysine Supplement – Powder

Vetoquinol Viralys L-Lysine Supplement – PowderFlavored with fish and poultry to entice your cat, this l-lysine supplement comes in a powder so you can easily add it to your cat’s food.

Buy on Amazon

Important Features to Consider

An l-lysine supplement for cats should have a few important features. Here’s what to consider when selecting l-lysine:

  • The form the supplement comes in. Cats are notoriously picky, and you certainly know your cat best. So choose a form that you think your cat will be more likely to take. L-Lysine supplements come in powders, chews, gels, and pastes. Which form you choose is best determined by what your cat will eat. Powders are easy to add to her food, chews can be used as treats, while gels and pastes are typically administered via a spoon or syringe.
  • The palatability of the supplement. Though this also refers to the form the supplement comes in, it also refers to the flavoring agent. Some powders have no flavoring, and should blend easily with your kitty’s food. Chews have a myriad of ingredients, and are more like a yummy treat than a supplement. Both gels and pastes also come in different flavors. You might have to offer your cat different flavors to see which one he likes the best.
  • Quality and certification. Many l-lysine supplements are audited by a third-party known as the National Animal Supplement Council, which tests for high quality ingredients. Always read the ingredient list to ensure you are giving your cat the best quality product you can.
  • Dosage. Once you and your veterinarian have determined what dose of lysine your cat needs, look for the supplement that gives you the best option. Powders tend to be more concentrated in lysine quantities than the other options, and may last longer than a bag of chews.

Frequently Asked Questions

What is L-Lysine for cats and what is it used for?

L-Lysine is an essential amino acid. The body does not make it, so this important protein builder has to be obtained through the diet. It plays a crucial role in the immune system, hormones, collagen formation, nutrient absorption, and the production of enzymes and antibodies.

It is often used to prevent and treat respiratory symptoms in cats. It is also commonly used to treat the herpes virus, such as feline herpes virus type 1. Many cat owners use l-lysine if they have multiple cats, foster cats, or a newly adopted cat, since viral infections are highly contagious and common.

What are the benefits of L-Lysine for cats?

L-Lysine might be beneficial for symptoms such as sneezing, congestion, eye discharge, and runny nose. It may be beneficial to cats who have FHV-1 by suppressing the herpes virus and reducing symptoms. This amino acid helps boost the immune system, and supports respiratory and eye health.

How much L-Lysine should I give my cat?

The dose recommended by veterinarians is 1,000 mg of lysine per day for cats over six months old. Kittens under six months of age should receive half of that – 500 mg per day. This supplement comes in multiple forms, so you can choose the one your cat will like best. Each form – powder, chews, gel, and paste – will have different measurements of l-lysine. Read the directions to determine how much of a particular form you need to give your cat.

What are the side effects of L-Lysine for cats?

According to the VCA Animal Hospital, there are really no known side effects of l-lysine for cats, except for possible stomach upset. However, l-lysine lowers the levels of arginine, another essential amino acid, in the body, potentially causing a deficiency. An arginine deficiency could lead to hyperammonemia, a metabolic disturbance that causes excess ammonia in the blood, which can be fatal.

Other L-Lysine for Cats We Reviewed

Best L-Lysine for Cats Overall

Vetoquinol Viralys L-Lysine Supplement – Powder

Vetoquinol Viralys L-Lysine Supplement – PowderFlavored with fish and poultry to entice your cat, this l-lysine supplement comes in a powder so you can easily add it to your cat’s food.

Buy on Amazon

We looked at 20 other l-lysine supplements for cats. Even though they didn’t make our 5 best l-lysine for cats list, they’re still great options for your kitty. The information you need to compare each one is listed below.

L-Lysine Powder for Cats

Best Pet Supplies LLC Premium L-Lysine

Best Pet Supplies LLC Premium L-Lysine

Best Pet Supplies l-lysine comes in an 8-ounce bottle, and contains no added fillers or additives.

Key Features:

  • 276 mg per one-eighth of a teaspoon
  • 30-day money back guarantee
  • Made in the USA

BUY ON AMAZON

Doggy Naturals L-Lysine Oral Granule Powder

Doggy Naturals L-Lysine Oral Granule Powder

This l-lysine powder supplement is made for cats of all ages, and has a fish and poultry flavor your cat will love. Each scoop equals 500 mg of lysine.

Key Features:

  • Add to your cat’s meal
  • Manufactured in an FDA- and USDA-regulated facility
  • Veterinarian recommended

BUY ON AMAZON

Global Pet Nutrition L-Lysine Powder

Global Pet Nutrition L-Lysine Powder

Your cat will love the salmon flavor of this l-lysine powder supplement; just add it to his food.

Key Features:

  • 100 servings in a 3.5 ounce container
  • 500 mg of lysine per scoop
  • For cats of all ages

BUY ON AMAZON

My Lucky Pets LLC L-Lysine

My Lucky Pets LLC L-Lysine

This l-lysine powder supplement is made for cats of all ages, and is recommended by veterinarians.

Key Features:

  • 276 mg of lysine per one-eighth teaspoon
  • Can be given with food
  • Made in the USA

BUY ON AMAZON

Strawfield Pets L-Lysine Powder Supplements

Strawfield Pets L-Lysine Powder Supplements

Made for cats of all ages, Strawfield Pets l-lysine offers 900 mg of chicken flavor lysine per scoop, resulting in 200 servings.

Key Features:

  • Made in the USA
  • No added fillers
  • More potent than other brands

BUY ON AMAZON

Thomas Labs Felo L-Lysine

Thomas Labs Felo L-Lysine

This l-lysine supplement comes in a powder form, and also contains dimethylglycine.

Key Features:

  • 300 mg of lysine per teaspoon
  • For cats of all ages
  • Just add to your cat’s food

BUY ON AMAZON

Budget L-Lysine Chews for Cats

Buddy & Lola L-Lysine

Buddy & Lola L-Lysine

Buddy & Lola l-lysine supplement is offered in vegetable flavor chews, with 125 mg of lysine per chew.

Key Features:

  • Made in the USA
  • 60 chews per container
  • 100 percent satisfaction guarantee

BUY ON AMAZON

DRS. Foster and Smith L-Lysine Soft Chews

DRS. Foster and Smith L-Lysine Soft Chews

DRS. Foster and Smith soft chews contain 1,100 mg of lysine in each one.

Key Features:

  • Formulated by veterinarians
  • Chicken and cheese flavor
  • 120 chews per container

BUY ON AMAZON

Pet Naturals of Vermont Lysine Chews

Pet Naturals of Vermont Lysine Chews

Pet Naturals of Vermont lysine chews have 250 mg of lysine per chew, and boast a chicken liver flavor that is sure to entice your cat.

Key Features:

  • Each bag contains 60 chews
  • Certified by the National Animal Supplement Council
  • Free of corn and wheat, with no artificial ingredients

BUY ON AMAZON

SanaVet Laboratories L-Lysine

SanaVet Laboratories L-Lysine

SanaVet Laboratories l-lysine supplement offers a chicken liver flavor chew that was formulated by veterinarians. There is 250 mg of lysine per chew.

Key Features:

  • Manufactured in the USA
  • A dollar is donated with every purchase
  • 60 chews in each 3.74 ounce bag

BUY ON AMAZON

Tomlyn Daily L-Lysine Supplement Lysine Chews

Tomlyn Daily L-Lysine Supplement Lysine Chews

Your cat will love the smokey fish flavor of these l-lysine chews. Each bag contains 30 chews at 500 mg of lysine each.

Key Features:

  • Made for cats of all ages
  • Veterinarian recommended
  • Approved by the National Animal Supplement Council

BUY ON AMAZON

L-Lysine Chews for Cats

Felisyl Immune System Support L-Lysine

Felisyl Immune System Support L-Lysine

Made for cats of all ages, this supplemental treat contains 250 mg of lysine in each chew.

Key Features:

  • Veterinarian recommended
  • 60 chews per 3.74 ounce bag
  • Chicken flavor

BUY ON AMAZON

NaturVet L-Lysine Immune Support

NaturVet L-Lysine Immune Support

NaturVet l-lysine contains 250 mg of lysine, 50 mg of vitamin C, and 25 mg astragalus root per chew.

Key Features:

  • 60 chews in a 3-ounce container
  • For cats over 12 weeks
  • 100 percent money back guarantee

BUY ON AMAZON

Optix Care L-Lysine Soft Chews

Optix Care L-Lysine Soft Chews

Optix Care soft chews are made for both cats and kittens, and contain the recommended amount advised by veterinarians.

Key Features:

  • Each chew contains 500 mg of lysine
  • 60 chews per 4.3 ounce bag
  • Chicken flavor

BUY ON AMAZON

Vetoquinol Enisyl-F Lysine Bites

Vetoquinol Enisyl-F Lysine Bites

Recommended by veterinarians, these l-lysine bites are good for cats of all ages.

Key Features:

  • National Animal Supplement Council seal of approval
  • Chicken liver flavor
  • 500 mg of lysine per 12 bites

BUY ON AMAZON

Other L-Lysine for Cats

Duralactin Feline L-Lysine

Duralactin Feline L-Lysine

This l-lysine supplement comes in a convenient syringe to make administering the paste to your cat even easier.

Key Features:

  • 250 mg per half a teaspoon
  • Contains omega 3 and 6 fatty acids
  • Measured doses are marked on the syringe

BUY ON AMAZON

Nutrition Strength Lysine

Nutrition Strength Lysine

This human grade l-lysine for cats comes in a chewable tablet form, offering 500 mg of lysine per tablet.

Key Features:

  • Tablets also contain coenzyme Q10
  • Made in the USA
  • Non-GMO ingredients

BUY ON AMAZON

Vetoquinol Enisyl-F Oral Paste L-Lysine Supplement

Vetoquinol Enisyl-F Oral Paste L-Lysine Supplement

This tuna flavored l-lysine supplement comes in a convenient pump canister so you can easily give it to your cat. One pump equals 250 mg of lysine.

Key Features:

  • Veterinarian recommended
  • National Animal Supplement Council seal of approval
  • Made for cats and kittens

BUY ON AMAZON

Vet Worthy Lysine Gel Aid

Vet Worthy Lysine Gel Aid

This l-lysine supplement comes in a gel form so it’s easy to administer to your cat, and he’ll love the salmon flavor. The convenient 3-ounce squeeze tube has 500 mg of lysine per teaspoon.

Key Features:

  • Formulated and recommended by veterinarians
  • Made in the USA
  • National Animal Supplement Council seal of approval

BUY ON AMAZON

VitaPaws L-Lysine

VitaPaws L-Lysine

VitaPaws l-lysine supplement capsules can be given whole or split open to sprinkle on top of food.

Key Features:

  • 500 mg of lysine per capsule
  • 90 capsules per bottle
  • Manufactured in the UK

BUY ON AMAZON

LEAVE A REPLY

Please enter your comment!
Please enter your name here