Immune System Support – Packed with L-Lysine (an essential amino acid) to bolster your cat’s immune defenses. A stronger immune system helps keep your kitty healthier and more resistant to common feline illnesses, giving them the best chance at a long, happy life.
Respiratory & Eye Health – Formulated to support clear breathing and overall wellness in cats. Felisyl’s immune-boosting action helps ease sneezing, runny nose, and watery eyes associated with common respiratory issues, so your cat can breathe easy and stay comfortable every day.
Tasty, Easy-to-Give Gel – Highly palatable salmon-flavored gel that cats love, making supplement time feel like a treat. No more struggles with pills – simply place the gel on your cat’s paw or nose and they’ll lick it off willingly, ensuring stress-free daily dosing.
Vet-Formulated & Trusted – Developed by veterinarians for optimal feline health benefits. Felisyl is also vet-recommended, trusted by vets for its proven benefits and positive impact on cats’ lives. Pet parents can feel confident knowing this immune support gel is backed by experts and real results.
NASC Certified Quality, Made in USA – Manufactured to the highest quality and safety standards set by the National Animal Supplement Council. Felisyl carries the NASC Quality Seal and is proudly made in the USA, so you can trust you’re giving your cat a safe, premium-grade supplement for their well-being.

Product description

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Feliysl L-Lysine Gel for Cats (5oz)

Merchant Video

L-lysine immune System Support

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Customer Reviews	4.4 out of 5 stars 1,944	4.2 out of 5 stars 721	3.1 out of 5 stars 66	4.5 out of 5 stars 852	4.5 out of 5 stars 792
Price	$18.99$18.99	$16.44$16.44	$17.50$17.50	$19.79$19.79	$18.99$18.99
Quanity	5 Ounces	3.5 oz	60 Soft Chews	30 CC	5 Ounces
Administration Method	Tasty Gel	Easy to Use Granules	Delicious Soft Chew	Paste	Tasty Gel
Flavor	Salmon	Poultry./Fish	Chicken	Chicken	Liver
Health Benefits	Respiratory Health	Respiratory Health	Respiratory Health	Firms Stool	Renal Health
Active ingredients	L-Lysine	L-Lysine	L-Lysine	Kaolin Clay/Apple Pectin	Potassium Citrate
Vet Formulated	✔	✔	✔	✔	✔
NASC Seal	✔	✔	✔	✔	✔
Made in the USA	✔	✔	✔	✔	✔