Tomlyn Immune Support L-Lysine Powder for Cats, 3.5 oz. Supplement Facts

Tomlyn Immune Support L-Lysine Powder for Cats, 3.5 oz. is a cat immune and allergy supplement in powder form.

At a glance

1Active ingredients

Key active ingredients

L-lysine Hydrochloride

Supplement facts

Active ingredientAmount
L-lysine Hydrochloride500 mg
Values above are transcribed from the product label exactly as printed. Supplements are not reviewed or approved by the FDA to treat, cure, or prevent disease, and independent testing shows label accuracy varies between brands. Always check with your veterinarian before starting a supplement.

Directions

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Sprinkle over dry food or mix with a small amount of canned food, For kittens under 6 months: For daily administration give 1/2 scoop (0.26 g) twice daily or as directed by your veterinarian. For cats 6 months and older: For daily administration give 1 rounded scoop (0.52 g) twice daily or as directed by your veterinarian. ADDITIONAL DETAILS Tomlyn Immune Support L-Lysine Powder for Cats Offering your feline immune support can be simple with lysine powder for cats from [Tomlyn](https://www.petco.com/shop/en/petcostore/brand/tomlyn%22%20/t%20%22_blank). Lysine is an amino acid—otherwise known as a building block protein. This vet-approved supplement not only helps your cat’s immune system but also supports their respiratory health and helps keep their vision strong. That’s quite a few benefits for a simple powder that can quickly be mixed with your kitty’s morning meal. Tomlyn lysine supplement for cats has plenty of L-lysine in each scoop—500 mg, to be exact. You can sprinkle the powder over dry or soft food so that administering the immune support supplement is relatively straightforward. Kittens under six months old can take 1/2 scoop twice per day...

Sprinkle over dry food or mix with a small amount of canned food, For kittens under 6 months: For daily administration give 1/2 scoop (0.26 g) twice daily or as directed by your veterinarian. For cats 6 months and older: For daily administration give 1 rounded scoop (0.52 g) twice daily or as directed by your veterinarian. ADDITIONAL DETAILS Tomlyn Immune Support L-Lysine Powder for Cats Offering...

Ingredients

L-lysine Hydrochloride 500 mg

Package sizes

3.5 OZ

Frequently asked questions

What is Tomlyn Immune Support L-Lysine Powder for Cats, 3.5 oz. for?

Tomlyn Immune Support L-Lysine Powder for Cats, 3.5 oz. is formulated as a immune and allergy supplement for cats.

What are the active ingredients in Tomlyn Immune Support L-Lysine Powder for Cats, 3.5 oz.?

Key active ingredients include l-lysine hydrochloride.

About this data

Data sources: Petco.

Data was compiled manually and may be out of date.

Barcode (GTIN): 030521033430

Data last updated July 11, 2026.

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About this data

We gather factual supplement details from public manufacturer and retailer listings and product labels. Values are shown exactly as printed on each label. Supplements are not reviewed or approved by the FDA to treat, cure, or prevent disease, and label accuracy varies by brand. Nothing here is veterinary advice, and no product listed here is endorsed. Always check with your veterinarian before starting a supplement. Product names and trademarks belong to their respective owners.

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