---
title: "Lysine Powder for Cats — $444K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/lysine-powder-for-cats"
last_updated: "2026-07-21T17:40:48.818Z"
locale: en
meta:
description: "Niche score 46/100 · $444K/yr market · 126K searches/yr · $21.82 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 46/100 · $444K/yr market · 126K searches/yr · $21.82 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Lysine Powder for Cats — $444K/yr Amazon US Niche (2026) - Flapen"
---
# **lysine powder for cats**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 57Growth 19Conversion 98Competition 2Returns 100Price range 83Avg price 92Brand share 0Review moat 24Quality gap 42
**Returns**
**Incredible****0.0%**
return rate — above 6% kills the launch gate
**Conversion**
**Incredible****16.1%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$21.82**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$12.16–$30.84**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Good****$444K**
$444K/yr · 126K searches
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****5,505**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-12.0%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****98%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, lysine powder for cats is a $444K/yr Amazon United States market (126K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–May–Jun. Verdict: Skip it — 46/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **lysine powder for cats market data**
- **Units sold / yr**
- **20K–25K**
- avg 3,000–4,000/product
- **Revenue / yr**
- **$436K–$546K**
- units × avg price
- **Launch success**
- **—**
- 0 of 0 new (360d)
- **Conversion rate**
- **16.1%**
- **Avg BSR**
- **#193**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **60 months**
- **Avg seller age**
- **184 days**
## **Competition & brand share**
The top 5 products capture 98% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**5 **▼falling
**Sellers**
**17**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**98%**
Top 20: 100%
**Open market**
**0%**
- Vetoquinol79% - Coco and Luna8% - TOMLYN6% - NOW Foods4% - Holy Pets2% - Open — no brand owns it (0%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -12.0% search growth over the last 90 days.
4K3KPrime Day '24Spike '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, May, Jun · busiest ÷ quietest = 3.7×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/lysine-powder-for-cats/trend)
## **Top lysine powder for cats search terms**
- **viralys lysine for cats**44K/yr-3.9%18.1% conv. - **viralys**21K/yr-17.3%16.4% conv. - **lysine powder for cats**17K/yr-15.1%10.2% conv. - **viralys for cats**17K/yr-25.1%14.1% conv. - **lysine for cats powder**5K/yr-4.1%10.5% conv. - **viralys l-lysine for cats**3K/yr+33.5%16.1% conv. - **tomlyn immune support for cats**4K/yr-16.7%15.8% conv. - **l-lysine powder for cats**3K/yr-12.5%11.1% conv. - **l lysine powder for cats**3K/yr-13.0%9.2% conv. - **cat lysine powder**3K/yr-7.4%8.9% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/lysine-powder-for-cats/search-terms)
## **Top lysine powder 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%15%$67K30%$133K45%$200K60%$267K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 6 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**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) [3**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) [4**Tomlyn Immune Support Daily L-Lysine Supplement Fish-Flavored Lysine Powder for Cats and Kittens 3.5oz**TOMLYN**$20.29**4.6★5,419 rev](https://www.amazon.com/dp/B00BERPOP4) [5**NOW Pet Health L-Lysine Supplement Powder Formulated for Cats NASC Certified 8-Ounce**NOW Foods**$12.16**4.5★3,547 rev](https://www.amazon.com/dp/B016WG7UF8)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Holy Pets 100% Pure L-Lysine Powder for Cats No Flavors No Fillers or Preservatives 1 000mg per Scoop Immune Respiratory & Eye Support Helps with Sneezing Runny Nose & Cold Symptoms**Holy Pets**$20.62**108 rev1y ago](https://www.amazon.com/dp/B0F3KJQS65) [**L-Lysine for Cats 900mg - Immune Eye & Respiratory Support Powder**Coco and Luna**$22.49**3,170 rev6y ago](https://www.amazon.com/dp/B083QR6NMT) [**NOW Pet Health L-Lysine Supplement Powder Formulated for Cats NASC Certified 8-Ounce**NOW Foods**$12.16**3,547 rev10y ago](https://www.amazon.com/dp/B016WG7UF8) [**Tomlyn Immune Support Daily L-Lysine Supplement Fish-Flavored Lysine Powder for Cats and Kittens 3.5oz**TOMLYN**$20.29**5,419 rev13y ago](https://www.amazon.com/dp/B00BERPOP4) [**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**9,577 rev20y ago](https://www.amazon.com/dp/B000FULBT4)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Holy Pets 100% Pure L-Lysine Powder for Cats No Flavors No Fillers or Preservatives 1 000mg per Scoop Immune Respiratory & Eye Support Helps with Sneezing Runny Nose & Cold Symptoms**Holy Pets**$20.62**4.4★**▲ 44%**](https://www.amazon.com/dp/B0F3KJQS65) [**NOW Pet Health L-Lysine Supplement Powder Formulated for Cats NASC Certified 8-Ounce**NOW Foods**$12.16**4.5★**▲ 17%**](https://www.amazon.com/dp/B016WG7UF8) [**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★**— 2%**](https://www.amazon.com/dp/B00AMEBH06) [**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★**— 1%**](https://www.amazon.com/dp/B000FULBT4) [**L-Lysine for Cats 900mg - Immune Eye & Respiratory Support Powder**Coco and Luna**$22.49**4.4★**— 9%**](https://www.amazon.com/dp/B083QR6NMT)
**~~View all trending →~~**
## **What buyers say about lysine powder for cats**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**15%
*“Great product and cats love it”*
**Taste-Overall**14%
*“They both love the taste of the powder”*
**Value For Money**13%
*“Good Value”*
**Flavor**8%
*“Flavor my cat loves”*
**Pet Friendly**6%
*“So easy to throw into my cats daily routine”*
**Advertised Vs Actual Product**6%
*“As Advertised”*
**Ease Of Use**6%
*“Easy to use”*
**Soothing/Teething**5%
*“Helps with respiratory problems”*
**Smell**4%
*“It has a strong fish smell”*
**Durability**2%
*“Always Reliable”*
### **What buyers complain about **
**Allergies**12%
*“showes signs of allergy just one day after he started taking it”*
**Value For Money**11%
*“The whole thing costed me almost $2,000”*
**Smell**9%
*“It does have a fishy smell”*
**Functionality-Overall**7%
*“Didn't work for my cats”*
**Flavor**7%
*“He does not like the maple flavor at all”*
**Indigestion**5%
*“he started coughing immediately after eating”*
**Taste-Overall**5%
*“Tastes terrible”*
**Ease Of Use**4%
*“Cant use”*
**Ease Of Chewing/Swallowing**3%
*“on Chewy”*
**Ease Of Cleaning**2%
*“will not let me clean his eyes”*
### **Top return reasons **
**Advertised Vs Actual Product**33%
**Functionality-Overall**33%
**Ethical Trade/Fair Trade**33%
## **Common questions**
- **Is lysine powder for cats profitable to sell on Amazon United States?**
- The niche generates $444K/yr across 6 tracked products. 90-day search growth is -12.0%. Flapen's verdict: Skip it (46/100).
- **How competitive is the lysine powder for cats niche?**
- 5 brands and 17 sellers compete. The top 5 products take 98% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in lysine powder for cats?**
- Top complaints mined from reviews: Allergies, Value For Money, Smell. The return rate is 0.0%.
- **When does demand for lysine powder for cats peak?**
- Demand peaks in Jan–Feb–May–Jun; the busiest month runs 3.7× the quietest.
- **What does it cost to enter the lysine powder for cats niche?**
- Listings span $12.16–$30.84; the average listing price is $21.82 (sweet spot $15–$100). The average incumbent carries 5,505 reviews — the moat a new listing must climb.
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