L-lysine is typically used to support a cat's immune system, respiratory health, and eye function, particularly for those managing feline herpes virus (FHV-1). It comes in several formats depending on your cat's preference: Common Types of L-Lysine Supplements
You can buy L-lysine for cats at major pet retailers like Chewy, Petco, and PetSmart, as well as at general stores like Walmart and Amazon . It is also commonly available through veterinarian-focused pharmacies such as VetRxDirect and PetMeds. where to buy l lysine for cats