---
title: "Lysine for Cats — $1.4M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/lysine-for-cats"
last_updated: "2026-07-22T20:49:44.611Z"
locale: en
meta:
description: "Niche score 62/100 · $1.4M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 62/100 · $1.4M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Lysine for Cats — $1.4M/yr Amazon US Niche (2026) - Flapen"
---
# **lysine for cats**
**Worth a look**
Shows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 84Growth 18Conversion 95Competition 42Returns 100Price range 70Avg price 87Brand share 56Review moat 39Quality gap 53
**Returns**
**Incredible****0.1%**
return rate — above 6% kills the launch gate
**Conversion**
**Incredible****12.7%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$19.98**
avg listing price — sweet spot $15–$100
**Market size**
**Great****$1.4M**
$1.4M/yr · 543K searches
**Price range**
**Good****$6.57–$34.50**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Good****71%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****60%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****2,577.04**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-13.5%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, lysine for cats is a $1.4M/yr Amazon United States market (543K searches/yr). The top 5 brands hold 71% of demand. Verdict: Worth a look — 62/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **lysine for cats market data**
- **Units sold / yr**
- **60K–80K**
- avg 3,000–4,000/product
- **Revenue / yr**
- **$1.2M–$1.6M**
- units × avg price
- **Launch success**
- **73%**
- 8 of 11 new (360d)
- **Conversion rate**
- **12.7%**
- **Avg BSR**
- **#88**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **63 months**
- **Avg seller age**
- **168 days**
## **Competition & brand share**
The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**20 **▲rising
**Sellers**
**34**
**Top-5 brand share**
**71%**
Top 20: 100%
**Top-5 click share**
**60%**
Top 20: 96%
**Open market**
**25%**
- Vetoquinol27% - SANTKOL15% - Pet Honesty13% - Coco and Luna10% - Felisyl7% - NOW Foods4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -13.5% search growth over the last 90 days.
13K8KSpike '25Prime Day '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/lysine-for-cats/trend)
## **Top lysine for cats search terms**
- **lysine for cats**277K/yr-22.4%11.6% conv. - **l-lysine for cats**62K/yr-7.6%9.1% conv. - **l lysine cats**46K/yr-18.4%11.1% conv. - **l lysine for cats**29K/yr-1.9%9.9% conv. - **cat immune support**20K/yr+38.5%6.2% conv. - **cat lysine**24K/yr-6.5%10.7% conv. - **lysine cats**17K/yr-14.8%8.5% conv. - **immune support for cats**13K/yr-7.7%3.8% conv. - **cat lysine supplement**10K/yr-31.9%9.8% conv. - **lysine supplement for cats**7K/yr+8.2%7.1% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/lysine-for-cats/search-terms)
## **Top lysine for cats products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%5%$69K10%$138K15%$207K20%$276K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Vetoquinol Viralys - Lysine Supplement for Cats & Kittens - Supports Eye Wellness Respiratory Health & Immune Strength - Flavored Oral Powder for Easy Feeding & Daily Use - 100 Grams**Vetoquinol**$30.84**4.6★9,577 rev](https://www.amazon.com/dp/B000FULBT4) [2**SANTKOL L-Lysine Supplement for Cats - Immune Support - 60ML Lysine for Feline Respiratory Sneezing Runny Nose Eye Function - Natural Cat Antibiotic Drops - Roast Chicken Flavor**SANTKOL**$20.67**4.5★1,503 rev](https://www.amazon.com/dp/B0DFGZCD2V) [3**Cat Immune Support Lysine Allergy Relief & Immune Health Supplement for Cats with L-Lysine Colostrum Quercetin & Omega-3 Soothes Sneezing Runny Nose & Itchy Skin Chicken (30-Day Supply)**Pet Honesty**$15.33**4.5★2,461 rev](https://www.amazon.com/dp/B0C2B7F597) [4**L-Lysine for Cats 900mg - Immune Eye & Respiratory Support Powder**Coco and Luna**$22.49**4.4★3,170 rev](https://www.amazon.com/dp/B083QR6NMT) [5**Vetoquinol Viralys - Lysine Supplement for Cats & Kittens - Supports Eye Wellness Respiratory Health & Immune Strength - Flavored Oral Gel for Easy Feeding & Daily Use for Picky Eaters - 5oz**Vetoquinol**$24.49**4.5★11,209 rev](https://www.amazon.com/dp/B00AMEBH06)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Lysine for Cats L-Lysine for Cats Chews & Lysine Treats 500 Chews Immune Support with L-Lysine Supplement Colostrum Quercetin & Omega-3 Respiratory Sneezing Runny Nose Eye Chicken Flavor**YOTANGO**$20.75**48 rev3mo ago](https://www.amazon.com/dp/B0GTTYCJGQ) [**Lysine for Cats 500ct Cat Immune Support Chews L-Lysine Supplement for Cats with Colostrum Omega-3 Soothes Sneezing Runny Nose & Upper Respiratory Support Crunchy & Creamy Chicken Krill Flavor**Carmelie**$19.66**127 rev3mo ago](https://www.amazon.com/dp/B0G2XWD5HV) [**Lysine for Cats - L-Lysine Liquid Drops for Cat & Kittens 60ML Lysine Supplement for Immune Support Reduces Sneezing/Runny Nose Supports Respiratory Eye & Nasal Health Easy-to-Feed 2 Fl Oz**letollhold**$16.08**16 rev6mo ago](https://www.amazon.com/dp/B0G7WN227N) [**Puyrzoe L-Lysine for Cats Drops Sneezing Runny Nose & Watery Eyes Relief Liquid Cat Lysine Supplement for Immune & Respiratory Support with Taurine & Vitamins to Boost Energy & Appetite 60 mL**puyrzoe**$16.72**138 rev6mo ago](https://www.amazon.com/dp/B0G71L2DVL) [**L-Lysine Supplement for Cats - Vitamins & Taurine for Immune Support & Allergy Relief - Lysine for Respiratory Sneezing Runny Nose Eye Function - Natural Cat Antibiotic Drops - 60ML Slamon Flavor**Petrivium**$16.37**90 rev7mo ago](https://www.amazon.com/dp/B0G5GLF1NZ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Lysine for Cats L-Lysine for Cats Chews & Lysine Treats 500 Chews Immune Support with L-Lysine Supplement Colostrum Quercetin & Omega-3 Respiratory Sneezing Runny Nose Eye Chicken Flavor**YOTANGO**$20.75**4.6★**▲ 315%**](https://www.amazon.com/dp/B0GTTYCJGQ) [**L-Lysine Supplement for Cats Immune & Respiratory Support Liquid with Natural Ingredients Chicken Flavor Dietary Supplement for Skin Coat & Eye Health 2 fl oz**FANSHI**$6.57**4.3★**▲ 286%**](https://www.amazon.com/dp/B0FY5L9M27) [**L-lysine Supplement for Cats Cat L-Lysine Liquid Drops for Immune Support Feline Respiratory Sneezing Runny Nose Helps Strengthen Natural Defenses Roast Chicken Flavor 2oz (60mL)**bnHUlMXw**$13.25**4.4★**▲ 187%**](https://www.amazon.com/dp/B0FX2BXFS1) [**Lysine for Cats - L-Lysine Liquid Drops for Cat & Kittens 60ML Lysine Supplement for Immune Support Reduces Sneezing/Runny Nose Supports Respiratory Eye & Nasal Health Easy-to-Feed 2 Fl Oz**letollhold**$16.08**3.9★**▲ 173%**](https://www.amazon.com/dp/B0G7WN227N) [**Lysine for Cats 500ct Cat Immune Support Chews L-Lysine Supplement for Cats with Colostrum Omega-3 Soothes Sneezing Runny Nose & Upper Respiratory Support Crunchy & Creamy Chicken Krill Flavor**Carmelie**$19.66**4.3★**▲ 147%**](https://www.amazon.com/dp/B0G2XWD5HV)
**~~View all trending →~~**
## **What buyers say about lysine for cats**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Pet Friendly**22%
*“My cat approved”*
**Taste-Overall**15%
*“Good taste”*
**Quality-Overall**9%
*“Excellent product”*
**Flavor**7%
*“Good flavor”*
**Value For Money**6%
*“Good Value”*
**Ease Of Use**5%
*“Package is easy to open”*
**Soothing/Teething**4%
*“She seems happy and calm”*
**Ease Of Chewing/Swallowing**4%
*“The chews are soft”*
**Allergies**4%
*“Good for allergies”*
**Ingredients-Overall**2%
*“Good ingredients”*
### **What buyers complain about **
**Allergies**12%
*“Cat allergy”*
**Smell**9%
*“It smells bad”*
**Value For Money**9%
*“The whole thing costed me almost $2,000”*
**Taste-Overall**7%
*“taste like poo, apparently”*
**Indigestion**6%
*“My cat had bad stomach from these”*
**Functionality-Overall**5%
*“It did not work for my cat”*
**Flavor**4%
*“not a popular flavor for us unfortunately”*
**Size-Overall**4%
*“Too big”*
**Ingredients-Overall**2%
*“Formula changed”*
**Ease Of Use**2%
*“Cant use”*
### **Top return reasons **
**Functionality-Overall**16%
**Ease Of Chewing/Swallowing**15%
**Advertised Vs Actual Product**12%
**Flavor**9%
**Leak-Proof**9%
**Smell**5%
**Indigestion**5%
**Defective Material/Parts**4%
**Value For Money**3%
**Ingredients-Overall**2%
## **Common questions**
- **Is lysine for cats profitable to sell on Amazon United States?**
- The niche generates $1.4M/yr across 24 tracked products. 8 of 11 products launched in the last 360 days are still selling. 90-day search growth is -13.5%. Flapen's verdict: Worth a look (62/100).
- **How competitive is the lysine for cats niche?**
- 20 brands and 34 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 71% of demand.
- **What do buyers complain about in lysine for cats?**
- Top complaints mined from reviews: Allergies, Smell, Value For Money. The return rate is 0.1%.
- **When does demand for lysine for cats peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the lysine for cats niche?**
- Listings span $6.57–$34.50; the average listing price is $19.98 (sweet spot $15–$100). The average incumbent carries 2,577 reviews — the moat a new listing must climb.
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