No. Our L-Lysine is 100% pure pharmaceutical grade. It contains no animal by-products, grains, fillers, or artificial preservatives, making it safe for cats with food allergies or sensitive stomachs.

L-Lysine is an essential amino acid, meaning your cat’s body cannot produce it on its own and it must be obtained through diet. It is a critical building block for protein and is widely used to support immune function, particularly for respiratory health and eye wellness.

This is an unflavored, pure powder. It has a very mild, slightly salty taste that is easily masked when mixed into wet food, tuna juice, or a delectable broth.

For most cats, a standard maintenance dose is 500mg (usually one scoop) twice daily. However, for flare-ups or specific health needs, please consult the feeding guidelines on the label or your veterinarian’s recommendation.

While L-Lysine is not harmful to dogs, it is specifically formulated to address feline health issues, particularly feline herpesvirus (FHV-1) and respiratory support. It typically does not offer the same targeted benefits for dogs.

L-Lysine is a natural amino acid and is generally safe to use with most medications. However, we always recommend consulting your veterinarian before adding a new supplement to your pet’s routine, especially if they are currently on prescription medication.

Yes! L-Lysine is safe for cats of all life stages. It is particularly beneficial for kittens with developing immune systems and senior cats who may need extra support to fend off respiratory issues.