---
product_id: 23751657
title: "NOW Pet Health, L-Lysine Supplement, Powder, Formulated for Cats, NASC Certified, 8-Ounce"
brand: "now foods"
price: "€ 21.26"
currency: EUR
in_stock: true
reviews_count: 13
category: "Now Foods"
url: https://www.desertcart.ie/products/23751657-now-pet-health-l-lysine-supplement-powder-formulated-for-cats
store_origin: IE
region: Ireland
---

# NASC Certified Quality Assurance Formulated Specifically for Cats 100% Pure L-Lysine Powder NOW Pet Health, L-Lysine Supplement, Powder, Formulated for Cats, NASC Certified, 8-Ounce

**Brand:** now foods
**Price:** € 21.26
**Availability:** ✅ In Stock

## Summary

> 🐾 Elevate your cat’s health game with pure, certified immune support!

## Quick Answers

- **What is this?** NOW Pet Health, L-Lysine Supplement, Powder, Formulated for Cats, NASC Certified, 8-Ounce by now foods
- **How much does it cost?** € 21.26 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/23751657-now-pet-health-l-lysine-supplement-powder-formulated-for-cats)

## Best For

- now foods enthusiasts

## Why This Product

- Trusted now foods brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Family-Owned Quality:** Crafted in the USA by a family business since 1968, trusted by pet parents everywhere.
- • **Pure & Potent Formula:** 100% pure L-Lysine powder with zero fillers—clean nutrition your cat deserves.
- • **Trusted Certification:** NASC certified to guarantee premium quality and safety you can rely on.
- • **Effortless Integration:** Odorless and tasteless powder blends seamlessly into any meal—no fuss, no stress.
- • **Immune Boosting Powerhouse:** Supports your cat’s immune, respiratory, and eye health for year-round vitality.

## Overview

NOW Pet Health L-Lysine Powder is a 100% pure, NASC-certified supplement designed exclusively for cats to support immune, respiratory, and ocular health. Odorless and tasteless, it easily mixes into meals, making it ideal for multi-cat households. Manufactured in the USA by a trusted family-owned company since 1968, this 8-ounce powder ensures premium quality and effective daily immune support for cats of all life stages.

## Description

NOW® Pets L-Lysine Powder helps support a healthy immune system, normal respiratory health, and ocular health. For use in Cats only. Perfect for multi-cat households and boarding.

Review: This works so well! - I feed a colony of feral cats, and in the past week, about 7 of them had runny eyes, runny noses and sneezing frequently. They weren't feeling well and not eating as much food as usual. I tried this and within 5 days, they are all recovering. I put a little bit in each bowl once a day. They didn't notice anything unusual about the food, since there is no smell or flavor to it. NOW, they aren't sneezing, their eyes are clearing, and they are feeling much better! This really works and they are so grateful!
Review: Great product to keep on hand! - Absolutely love this product! Not only is it a great price but its so easy to use! Its odorless and tasteless so you can mix it right in with some wet food and you animals will never know! Great quality as ive been using this for a long time and wouldnt change. Its kinda gritty but if mixed well they will never know! It keeps my animals healthy all year long and gives them that immune boost they need! Helps protect against URI!(

## Features

- IMMUNE SYSTEM SUPPORT FOR CATS: L-Lysine supports a healthy immune system, normal respiratory health, and ocular health
- PURE POWDER: Our l-lysine powder is 100% pure, safe, and free of any fillers
- NASC CERTIFIED: Certified by the National Animal Supplement Council (NASC), an organization that protects and enhances the integrity of the animal health product industry
- PET-PARENT APPROVED: Manufactured with the same attention to quality and detail NOW puts into their supplements intended for humans, from the sourcing of top-quality ingredients to finished product testing
- Packaged in the USA by a family owned and operated company since 1968

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B016WG7UF8 |
| ASIN  | B016WG7UF8 |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #27,546 in Health & Household ( See Top 100 in Health & Household ) #32 in L-Lysine Nutritional Supplements #2,069 in Sales & Deals |
| Brand Name | NOW Foods |
| Breed Recommendation | All Breed Sizes |
| Color | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (3,432) |
| Date First Available | September 19, 2015 |
| Date First Available  | September 19, 2015 |
| Directions | For use in Cats only. Directions for Use: Can be given during or after mealtime. For cats up to 5 3/4 lbs. = 1/16 teaspoon twice weekly For cats over 6 lbs. = 1/8 teaspoon twice weekly |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 3 x 3 x 5.5 inches |
| Item Package Dimensions L x W x H | 5.39 x 2.95 x 2.83 inches |
| Item Weight | 10.16 ounces |
| Item model number | 4450 |
| Item model number  | 4450 |
| Manufacturer | NOW |
| Manufacturer  | NOW |
| Model Name | NOW |
| Number of Items | 1 |
| Product Dimensions  | 3 x 3 x 5.5 inches; 10.16 ounces |
| Size | 8 OZ |
| Specific Uses for Product | Heart |
| Target Audience Keyword | house-cats, unisex-adult |

## Product Details

- **Active Ingredients:** L-Lysine Hydrochloride - 276 mg
- **Brand:** NOW Foods
- **Flavor:** Unflavored
- **Item Form:** Powder
- **Item Weight:** 10.16 ounces

## Images

![NOW Pet Health, L-Lysine Supplement, Powder, Formulated for Cats, NASC Certified, 8-Ounce - Image 1](https://m.media-amazon.com/images/I/71sBMEbhQsL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Amazon needs to show the label's ingredients so is it pure L-Lysine no fillers or additives? Thank you.**
A: No fillers or additives, so it is pure L-Lysine.  And to be honest when I bought the flavored powder L-Lysine made specifically for cats (different brand)- I was able to see a white powder in jar and a few streaks of tan powder- it didn't stay mixed well and the tan powder was the added flavoring.  This product is white granules.  I mix it in with canned food- the added flavorings I was paying A LOT extra for was never needed and I was so glad when I switched to buying from Now brands, definitely a money saver.

**Q: Why does directions say twice weekly? I thought twice daily.**
A: Directions say--cats 6 months and older-1/8 teaspoon twice weekly.    Kittens 6 months and younger -1/16 teaspoon twice weekly.. My cat was not eating for three days and would hide under the bed. After two days of this stuff he started to come around. Now hes back to his old self. I gave him a pinch twicw a day the first week because he was so bad, now im going with the directions. Good luck,,,cap

**Q: How to the feed ration?**
A: I just mix it in with the cat's food.These are the manufacturer directions:* For cats 6 months or older 1/8 teaspoon twice daily* For kittens under 6 months 1/16 teaspoon twice daily

**Q: Why does this product have a california proposition 65 warning?**
A: California does not include pet products in Prop 65. NOW does not add this warning, but some resellers add a warning for all products sold to California businesses or residents to assure compliance with that unique law in case manufacturers aren’t testing heavy metals; NOW does this testing.

## Customer Reviews

### ⭐⭐⭐⭐⭐ This works so well!
*by J***. on December 29, 2025*

I feed a colony of feral cats, and in the past week, about 7 of them had runny eyes, runny noses and sneezing frequently. They weren't feeling well and not eating as much food as usual. I tried this and within 5 days, they are all recovering. I put a little bit in each bowl once a day. They didn't notice anything unusual about the food, since there is no smell or flavor to it. NOW, they aren't sneezing, their eyes are clearing, and they are feeling much better! This really works and they are so grateful!

### ⭐⭐⭐⭐⭐ Great product to keep on hand!
*by J***A on February 10, 2026*

Absolutely love this product! Not only is it a great price but its so easy to use! Its odorless and tasteless so you can mix it right in with some wet food and you animals will never know! Great quality as ive been using this for a long time and wouldnt change. Its kinda gritty but if mixed well they will never know! It keeps my animals healthy all year long and gives them that immune boost they need! Helps protect against URI!(

### ⭐⭐⭐⭐⭐ High quality and good value
*by K***C on October 31, 2025*

I have a cat with feline herpes, and Lysine makes all the difference in her ability to breathe well. This bottle from Now Pet Health is a great value in comparison to the major competing brand I'd been using for years. It works just as well and lasts a little longer for a lower price. It's easy to measure with the tiny included scoop. Without lysine, my cat is congested. When she's congested, she doesn't eat. This is vital to her health. Both of my cats like the taste. I'm thankful to have found this product.

## Frequently Bought Together

- NOW Foods Pet Health, L-Lysine Supplement, Powder, Formulated for Cats, NASC Certified, 8-Ounce
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- Nutramax Laboratories Cosequin Joint Health Supplement for Cats - With Glucosamine and Chondroitin, 80 Capsules

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---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-22*