We Use CookiesWe use cookies to enhance the security, performance, functionality and for analytical and promotional activities. By continuing to browse this site you are agreeing to our privacy policy

10 Best Lysine For Cats 2025 in the United States

How do we rank products for you?

Our technology thoroughly searches through the online shopping world, reviewing hundreds of sites. We then process and analyze this information, updating in real-time to bring you the latest top-rated products. This way, you always get the best and most current options available.

headphones-stars

Our Top Picks

#1

Winner

Cat Multivitamin Crunchy & Creamy Chews - Cat Treats for Health + Immune, Joint Support, Skin & Coat, & Digestion - Vitamins with Omega 3s, Lysine & Probiotics (30 Day Supply)

Rating
9.7
Chosen by1,186
Form
Dosage
Ingredients

Most important from
3664 reviews

Form
The palatable, dual-textured chews are well accepted, simplifying daily administration.
Dosage
Using the product beyond recommended doses showed no adverse effects, underscoring its gentle formulation.
Ingredients
These supplements provide peace of mind by delivering essential nutrients that support immune and respiratory health.

Pet Honesty’s Multivitamin Crunchy & Creamy Chews are designed for adult cats needing support for immune health, joints, skin, coat, and digestion, with lysine included for immune and respiratory benefits. The product comes in a pellet form featuring a unique dual texture—crunchy outside and creamy inside—which many cats find appealing, making it easier for owners to administer. The chews are chicken-flavored, a popular choice among cats, increasing the chances your pet will enjoy them. Dosage is straightforward, with one chew per pound of cat body weight, adjustable over time. Ingredients include lysine, beta glucan (a prebiotic for digestive health), and omega-3 fatty acids from fish oil, flaxseed, and green-lipped mussels, all natural and free from common fillers like corn, wheat, and soy.

Pet Honesty has a strong reputation for quality, manufacturing in the USA under strict safety standards and is a member of an industry quality organization, which adds peace of mind on product reliability. The chews come in a 30-day supply, making it suitable for ongoing health maintenance. Some cats may still be picky despite the flavor and texture, and the price might be higher than simpler lysine-only supplements. Those looking solely for lysine supplementation might find more budget-friendly or concentrated options. This multivitamin chew provides a convenient all-in-one approach for cat owners wanting broad health support with the added benefit of lysine in an easy-to-give treat.

Rating
9.7
Chosen by1,186
Form
Dosage
Ingredients

Most important from
3664 reviews

Form
The palatable, dual-textured chews are well accepted, simplifying daily administration.
Dosage
Using the product beyond recommended doses showed no adverse effects, underscoring its gentle formulation.
Ingredients
These supplements provide peace of mind by delivering essential nutrients that support immune and respiratory health.
#2

Cat Immune Support Lysine - Cat Allergy Relief - Sneezing, Runny Nose, Watery Eyes - Cat Supplements & Vitamins with Omega 3s, L-Lysine, Antioxidants, Colostrum - Chicken (30 Day Supply)

Rating
9.4
Form
Dosage
Flavor

Most important from
1558 reviews

Form
This product is made of great quality, easy for cats to chew and digest, and has many health benefits. My cats absolutely love these treats!
Dosage
Within about a week of using these treats, our kitten with a respiratory infection started to feel better. Highly recommended!
Flavor
Loki loves the taste so much that he tries to squeeze under the door of the closet where I keep them. Great product!

Pet Honesty Cat Immune Support Lysine chews offer a convenient and tasty way to support your cat’s immune and respiratory health. The chews have a unique dual texture – crunchy on the outside and creamy on the inside – which cats seem to enjoy. The product includes high-quality, natural ingredients such as Lysine, colostrum, and quercetin, all known to support immune function and reduce inflammation. Additionally, the inclusion of Omega 3s and prebiotics helps promote overall health, including skin and gut health.

The chicken flavor is likely to be appealing to most cats, making administration easier for pet owners. The product is produced in the USA in a GMP-compliant facility, ensuring high safety and quality standards, and the brand, Pet Honesty, has a good reputation among pet owners. However, the dosage guidelines may be a bit cumbersome, requiring pet owners to adjust based on their cat's weight and split doses between morning and evening. Some cats might be finicky about the taste or texture, and there is always the potential for individual adverse reactions.

Pet Honesty Cat Immune Support Lysine chews are a solid option for cat owners looking to support their pet’s immune system and alleviate allergy symptoms, particularly if their cat enjoys chicken-flavored treats.

Rating
9.4
Form
Dosage
Flavor

Most important from
1558 reviews

Form
This product is made of great quality, easy for cats to chew and digest, and has many health benefits. My cats absolutely love these treats!
Dosage
Within about a week of using these treats, our kitten with a respiratory infection started to feel better. Highly recommended!
Flavor
Loki loves the taste so much that he tries to squeeze under the door of the closet where I keep them. Great product!
#3

Purrly Lickable Cat Treat Healthy Human-Grade Tuna & Turkey with L-Lysine & Astaxanthin for Immunity (30 Count) Soft Healthy Low Calorie Hydrating Interactive Snack

Rating
9.2
Form
Dosage
Ingredients

Most important from
930 reviews

Form
Cats find these lickable treats irresistible, making them a perfect bonding and interactive snack.
Dosage
The low-calorie count allows for worry-free snacking, especially for cats prone to overeating.
Ingredients
The human-grade ingredients and clean formula provide peace of mind about what’s going into my cat’s body.
Flavor
The combination of tuna and turkey flavors appeals broadly, encouraging even sick or picky cats to eat and stay hydrated.
Brand Reputation
Though a bit pricey, the superior quality and positive cat response justify the cost.

Purrly Lickable Cat Treats offer a soft, lickable snack that’s easy to serve directly from the pouch, making it an interactive and bonding experience for you and your cat. These treats use human-grade tuna and turkey, providing high-quality protein without artificial additives, fillers, or preservatives. The clean ingredient list appeals to cat owners seeking natural and trustworthy treats.

Enriched with L-Lysine and astaxanthin, these treats support immunity, which is beneficial for those specifically looking for lysine supplementation. The addition of natural broth provides extra hydration, especially helpful for cats who don’t drink enough water. Each pouch contains fewer than 6 calories, allowing you to give treats without much concern for weight gain, which is ideal for cats prone to overeating.

The tuna and turkey flavor combination is attractive to many cats, although some picky eaters might need time to adjust. The pouch format requires refrigeration after opening, and these treats are intended as occasional snacks or meal toppers, not as full meal replacements. Purrly has a strong reputation supported by positive customer reviews that reflect satisfaction with taste and quality. This product suits cat owners looking for a healthy, flavorful lysine treat that also aids hydration and bonding, but it may not be ideal for those who prefer dry treats or require a higher lysine dose per serving.

Rating
9.2
Form
Dosage
Ingredients

Most important from
930 reviews

Form
Cats find these lickable treats irresistible, making them a perfect bonding and interactive snack.
Dosage
The low-calorie count allows for worry-free snacking, especially for cats prone to overeating.
Ingredients
The human-grade ingredients and clean formula provide peace of mind about what’s going into my cat’s body.
Flavor
The combination of tuna and turkey flavors appeals broadly, encouraging even sick or picky cats to eat and stay hydrated.
Brand Reputation
Though a bit pricey, the superior quality and positive cat response justify the cost.

Buying Guide for the Best Lysine For Cats

When choosing lysine supplements for your cat, it's important to understand the key factors that can influence the effectiveness and suitability of the product for your pet. Lysine is an essential amino acid that can help support your cat's immune system, particularly in managing feline herpesvirus. To ensure you select the best lysine supplement for your cat, consider the following key specifications and their importance.
FormLysine supplements for cats come in various forms, including powders, gels, chews, and tablets. The form is important because it affects how easily you can administer the supplement to your cat. Powders can be mixed with food, which is ideal for cats that are picky eaters. Gels can be applied directly to the cat's paw for them to lick off. Chews and tablets can be given as treats. Choose the form that best suits your cat's preferences and your convenience in administering it.
DosageThe dosage of lysine is crucial to ensure your cat receives the right amount to be effective without causing any harm. Dosages are typically measured in milligrams (mg) and can vary depending on the product. It's important to follow the recommended dosage instructions provided by the manufacturer or your veterinarian. For general guidance, a common dosage is around 250-500 mg per day for adult cats. Always consult with your vet to determine the appropriate dosage for your cat's specific needs.
IngredientsCheck the ingredient list to ensure the lysine supplement does not contain any harmful additives or fillers. Some products may include additional vitamins or minerals that can be beneficial, but it's important to avoid any ingredients that your cat may be allergic to or that could cause adverse reactions. Look for products with minimal and natural ingredients to ensure the safety and health of your cat.
FlavorThe flavor of the lysine supplement can significantly impact whether your cat will willingly consume it. Common flavors include chicken, fish, and liver, which are generally appealing to cats. If your cat is a picky eater, choosing a supplement with a flavor they enjoy can make administration much easier. You may need to try a few different flavors to find the one your cat prefers.
Brand ReputationThe reputation of the brand can give you an indication of the quality and reliability of the lysine supplement. Look for brands that are well-known and have positive reviews from other cat owners. Researching the brand's history, manufacturing practices, and customer feedback can help you make an informed decision. Trusted brands are more likely to provide high-quality and effective products.

FAQ

Most Popular Categories Right Now