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🐾 Keep your cat thriving—because they deserve the best in health and flavor!
SANTKOL L-Lysine Supplement for Cats is a 60ML liquid formula designed to boost feline immune health, support respiratory function, and promote normal eye health. Featuring a natural roast chicken flavor and a clean, additive-free recipe, it’s suitable for cats of all ages and breeds. Trusted by thousands of cat owners, this easy-to-administer supplement helps manage common feline issues like sneezing, runny nose, and watery eyes, ensuring your furry friend stays vibrant and comfortable.
















| Customer Reviews | 4.6 out of 5 stars 1,472 Reviews |
T**T
Works great for my FIV+ Rescue Cat
We rescued a stray cat approximately 9-mo ago that was living on our property (long before we moved in). When we took him in he was extremely frail and emaciated, with very little energy, and he was runny, sneezy and wheezy. SHORT STORY (if you just want to get to the point): We’ve recently begun using this L-Lysine product and it’s definitely helping (along with daily Albuterol nebulizer treatments). I definitely recommend it. He also enjoys the flavor (thank goodness). The only negative is that it can get messy, as it drips off the glass dropper - so - bring a paper towel with you! LONG STORY (if you’re curious): For context, when we moved into our temporary rental while buying a home 13-mo ago there were approximately 15 stray cats on the Lot and we installed gravity feeders, automatic water bowls, and temperature controlled cat houses on the side of the home for them. They were all VERY friendly and took to us quickly, even responding to the names we gave them, over time. We worked with a local nonprofit to get them TNR’d, as well as their much needed vaccines. For the most part, they were just hungry. But they gained weight quickly once they started being fed regularly and had a safe/comfortable place to eat and sleep. Anyway, back to the one we took in… he was NOT gaining weight and his energy was fading, fast. One night we came home from a dinner out and noticed that he couldn’t walk across the driveway to say hi to us, which meant he was likely not walking to the food/water, either. When I went to his self-proclaimed sleeping spot he was purring loudly and rubbing his head in my hands, but it was obvious that he was giving me every ounce of energy he had. His breathing was labored, and nose running profusely. He was one of the few cats that already had an “ear tip” (meaning he was TNR’d before we became involved), which meant the nonprofit wouldn’t typically get involved, but luckily we are good friends with the woman who runs it so we immediately called her (at 9 p.m., as they do their nonprofit TNR’s at a local shelter through the night when the facility is closed) and she told us to bring him right away. We put him in the carrier, which he didn’t even protest to, and drove him over and left him there for the night. Their vet was able to determine that he had a SEVERE URI (Upper Respiratory Infection), and was SEVERELY DEHYDRATED (he went through 3x the amount of fluids a typical stray would receive). We also opted for the SNAP Test and were told that he DOES, in fact, have FIV. They gave him a heftily dosed antibiotic shot and let us take him home the following morning. There was NO WAY I was putting him back outside in that state. We quarantined him inside our home (we had 3 of our own personal indoor cats and URI’s are extremely contagious), and for 3-WEEKS he barely wanted to leave his sleep space. He slept like he had never had a true peaceful moment of sleep in his life! He was so grateful and loving. He also doubled his weight in that short period of time. We realized almost immediately that he was now a part of the family. Unfortunately, the URI didn’t seem to fully clear so the vet gave him an oral round of antibiotics. He got “better” but within days of finishing the prescription his running nose, sneezing, runny eyes and asthma attacks would return. Fast forward to 9-mo later and he has (unfortunately) been through 5 rounds of different antibiotics. All had the same result: good then back to sick almost immediately. He’s also been to the vet (not the nonprofit) 4 times, which is pricey (but worth it for his comfort). We’re now waiting on the lab test to come back on his nasal swab - as they have been treating him as bacterial, but, given that he is FIV+, it’s likely viral. Anti-virals are expensive and since we did the SNAP test without proper education prior to attaining pet insurance, it’s considered a “pre-existing condition” so it’s not covered. In the interim, we’ve recently begun using this L-Lysine product and it’s definitely helping (along with daily Albuterol nebulizer treatments). I definitely recommend it. It helps to keep the runny, sneezy, wheezy stuff at bay. If it has been working well for him, it should certainly help others, too. The product is more like a broth, than a syrup, and it is made with quality ingredients.
A**A
Miraculously effective!
Is it a miracle? Time will tell but after less than 24 hours, my British Shorthair who has had runny eyes for nearly 9 years is sitting in the window right now with dry eyes 🤯. He also recently, over the last 2 years, starting sneezing during springtime. I didn’t know cats get allergies, but putting two and two together, it must be that. Anyway, I have not heard one sneeze from him since I gave him his first dose. He’s a big boy (18lb) so I gave him 2 droppers full in his wet food. He’s picky, he would not lick it up directly from the dropper. I will update this review if anything changes but for now, I am completely astonished at how effective this supplement is. In fact, I feel bad I didn’t do this sooner. We’ll see if his coat improves and/or his energy. So far, great product and I highly recommend giving it a shot to treat leaky eyes. Photos are before and today!!
F**5
Great product
I have 2 kitties that have chronic respiratory and sinus infections. L-lysine was suggested to help with their condition. We tried all the powdered forms of this supplement but being cats they would not eat it in any type of food. This product was our last resort and I honestly wish it was our first go-to product. My kitties love the taste and its so easy to administer! I personally do not use the dropper, by my own choice, as my kitties try to chew it. I now use a 1 ml luer tip syringe to measure and administer the accurate dosage. Not only do my cats look forward to medicine time but I know the product is working as their symptoms have drastically lessened over the past 2 months and they have more energy as well. Like any supplement, this takes time to work, so give it a few months. I'm glad we decided to stay the course as after 2 months my cats show marked improvement and are continuing to progress more each week. I will continue to use this product, as for my kitties, their condition will back slide and their health will once again decline if we stop. Their quality of life is very important and this has now become our daily routine and since the kitties love the taste, they will continue to eagerly consume it. Please give this product a try and use it for a while, as to give it a chance to work. Your kitties will thank you !
G**L
My Cats like it.
Cats love the taste and it works. Dark bottle protects contents and dropper is easy to use. Good product. Repeat buyer.
D**Y
Delicious supplement easy for kitty to eat
Lysine supplements were recommended by our vet for our cat to improve his immune system. This liquid form was the first one he would eagerly consume. We have been using it for the last few years and are very happy with it!
A**C
It's literally like video
My one cat cat licks the dropper or loves it on his food. He has found his new favorite treat.. now my other cat, she is not a fan of anything medicine. I'll update this with a video of 1 vs the other. We've tried mixing it with her food and she's still like, "I can't go for that, no can do." Effective, smells like chicken great price, the quantity/size is decent. It's not chunky it's smooth. Safe
L**A
Awesome Product!
I have become feeder of all things wild in the neighborhood. About two months ago one of the feral cats had four kittens, two have died and the other two had serious congestion and runny pus that was drying making them unable to open their eyes. Since I feed eleven cats I have treated all of them with the Santkol L-lysine on canned food, a treat regardless of the L-Lysine. In just three days, the kittens have eyes open (also using HICC eye wipes) and their noses have quit running, sneezing has slowed down considerably. Momma cat is (hopefully) about to be trapped and fixed!
C**M
Works great
This lysine was easy to administer as my cat wasn't eating much food, cleared her cold up in three days.
A**R
Cats love the taste!
Great Product. My cats love the taste.
E**A
Wirkt
Super wirkung
L**C
Works for seasonal allergies
These drops are amazing. My cat suffers with seasonal allergies in the summer and it really affects his mood, he used to get gunky eyes etc. Using L - Lysine fixed all these, I can have windows open all day and all night, it doesn't affect him anymore. He is a very fussy eater but he's obsessed with the flavour. He begs for these every morning. Only downside is that due to his size, bottle only lasts a month so works out pretty expensive.
T**A
muy buena elección 👌
Mucho mejor que la L-lisina en polvo, los michis lo toleran más y mejor🥰 les estoy dando otras cosas de complemento,pero creo que funciona muy bien, sobretodo para los gatos con gengivitis,un complemento efectivo...pero es mucho más costosa que el bote en polvo y rinde menos por supuesto, aunque repito se la toman mejor en con su comida húmeda
P**A
Ottimo complemento
Il mio gatto le adora e pure le sue articolazioni sono migliorate
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