---
product_id: 23751657
title: "Pet Health, L-Lysine Supplement, Powder, Formulated for Cats, NASC Certified, 8-Ounce"
brand: "now foods"
price: "$28.13"
currency: USD
in_stock: true
reviews_count: 13
category: "Now Foods"
url: https://www.desertcart.us/products/23751657-pet-health-l-lysine-supplement-powder-formulated-for-cats-nasc
store_origin: US
region: United States of America
---

# NASC certified for trusted quality 100% pure, filler-free powder 276 mg L-Lysine for immune defense Pet Health, L-Lysine Supplement, Powder, Formulated for Cats, NASC Certified, 8-Ounce

**Brand:** now foods
**Price:** $28.13
**Availability:** ✅ In Stock

## Summary

> 🐾 Elevate your cat’s health game with pure, powerful L-Lysine!

## Quick Answers

- **What is this?** Pet Health, L-Lysine Supplement, Powder, Formulated for Cats, NASC Certified, 8-Ounce by now foods
- **How much does it cost?** $28.13 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/23751657-pet-health-l-lysine-supplement-powder-formulated-for-cats-nasc)

## 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

- • **Pure & Potent:** No fillers, just clean, unflavored powder that blends seamlessly into meals.
- • **Immune Boosting Power:** Supports your cat’s natural defenses with clinically effective L-Lysine dosage.
- • **Easy Dosage & Palatable:** Comes with a precise scoop and dissolves effortlessly, ensuring your cat won’t skip a meal.
- • **Vet-Trusted Certification:** NASC certification guarantees premium safety and efficacy standards.
- • **Multi-Cat Household Friendly:** Perfect for families with multiple cats or boarding situations to keep everyone healthy.

## Overview

NOW Pet Health L-Lysine Powder is a NASC-certified, 100% pure supplement delivering 276 mg of L-Lysine per serving to support cats’ immune, respiratory, and ocular health. Ideal for cats 6 months and older, it’s unflavored for easy mixing and trusted by vets and pet parents alike to promote wellness in multi-cat homes.

## 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: Cleared Up Goopy Eyes and Runny Nose in a Week - I bought this last year for a friend with a cat that had herpes, but she didn't want it. Recently, I took in a wounded feral cat that had been attacked by another animal. He had goopy eyes and a runny nose. I consulted the vet who treated the cat's abscess about using L-Lysine to try to clear up his eyes and nose, and the vet agreed it was worth a try and figured out the correct dosage for the cat. I have been mixing it into his wet food for a week now, and his eyes and nose have cleared up. I am posting a before and after picture of this tangerine dream of a cat. He's semi-feral and will not let me clean his eyes, but they are so much better now. The powder seems to dissolve into the wet food because he eats the wet food without any issues, so I am assuming that it's not altering the flavor of the wet food. He now looks better than ever.
Review: High quality and good value - 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.

## 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 BRAND: NOW Pets is certified by the National Animal Supplement Council, 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 all their products, from the sourcing of top-quality ingredients to finished product testing
- Founded in 1968 by Elwood Richard, NOW is one of the largest independent, family- and employee-owned manufacturers of natural products
- Give to your cat during or after mealtime. For cats 6 months or older 1/8 teaspoon twice daily and kittens under 6 months give 1/16 teaspoon twice daily.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B016WG7UF8 |
| Active Ingredients | L-Lysine Hydrochloride - 276 mg |
| Best Sellers Rank | #29,557 in Health & Household ( See Top 100 in Health & Household ) #32 in L-Lysine Nutritional Supplements #1,998 in Sales & Deals |
| Brand | NOW Foods |
| Brand Name | NOW Foods |
| Customer Reviews | 4.5 out of 5 stars 3,566 Reviews |
| Flavor | Unflavored |
| Global Trade Identification Number | 00733739044501 |
| Item Form | Powder |
| Item Type Name | Herbal/Mineral Supplements |
| Item Weight | 10.24 ounces |
| Manufacturer | NOW |
| Manufacturer Part Number | 4450 |
| Model Number | 4450 |
| Number of Items | 1 |
| Product Benefits | Immune Support |
| Specific Uses For Product | Heart |
| Target Species | Cat |
| UPC | 733739044501 |
| Unit Count | 8 Ounce |
| Volume | 0.62 ml |

## Product Details

- **Active Ingredients:** L-Lysine Hydrochloride - 276 mg
- **Brand:** NOW Foods
- **Flavor:** Unflavored
- **Item Form:** Powder
- **Item Weight:** 0.64 Pounds

## Images

![Pet Health, L-Lysine Supplement, Powder, Formulated for Cats, NASC Certified, 8-Ounce - Image 1](https://m.media-amazon.com/images/I/71XDv3QInAL.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

### ⭐⭐⭐⭐⭐ Cleared Up Goopy Eyes and Runny Nose in a Week
*by L***W on March 2, 2026*

I bought this last year for a friend with a cat that had herpes, but she didn't want it. Recently, I took in a wounded feral cat that had been attacked by another animal. He had goopy eyes and a runny nose. I consulted the vet who treated the cat's abscess about using L-Lysine to try to clear up his eyes and nose, and the vet agreed it was worth a try and figured out the correct dosage for the cat. I have been mixing it into his wet food for a week now, and his eyes and nose have cleared up. I am posting a before and after picture of this tangerine dream of a cat. He's semi-feral and will not let me clean his eyes, but they are so much better now. The powder seems to dissolve into the wet food because he eats the wet food without any issues, so I am assuming that it's not altering the flavor of the wet food. He now looks better than ever.

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Work well! Good product
*by R***D on May 27, 2026*

Always works great on my little feral outdoor kitty who gets goopy eyes, usually clears it up within 24 hours . Very good

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-01*