lysine for cats
Worth a lookShows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.1%return rate — above 6% kills the launch gate
Conversion
Incredible12.7%search→purchase rate — share of searches ending in a sale
Avg price
Great$19.98avg listing price — sweet spot $15–$100
Market size
Great$1.4M$1.4M/yr · 543K searches
Price range
Good$6.57–$34.50cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Good71%top-5 brand share — brands hold most of the demand
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Competition
Okay60%top-5 click share — leaders hold, buyers still browse
Review moat
Okay2,577.04avg 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
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.No pronounced peak months · busiest ÷ quietest = 1.3×
Top lysine for cats search terms
- lysine for cats277K/yr
- l-lysine for cats62K/yr
- l lysine cats46K/yr
- l lysine for cats29K/yr
- cat immune support20K/yr
- cat lysine24K/yr
- lysine cats17K/yr
- immune support for cats13K/yr
- cat lysine supplement10K/yr
- lysine supplement for cats7K/yr
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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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$30.844.6★9,577 rev
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$20.674.5★1,503 rev
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$15.334.5★2,461 rev
L-Lysine for Cats 900mg - Immune Eye & Respiratory Support Powder
Coco and Luna$22.494.4★3,170 rev
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$24.494.5★11,209 rev
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$20.7548 rev
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$19.66127 rev
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$16.0816 rev
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$16.72138 rev
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$16.3790 rev
Trending
90-day click momentumLysine 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$20.754.6★
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$6.574.3★
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$13.254.4★
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$16.083.9★
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$19.664.3★
What buyers say about lysine for cats
What buyers praise and complain about, mined from review topics.What buyers love
“My cat approved”
“Good taste”
“Excellent product”
“Good flavor”
“Good Value”
“Package is easy to open”
“She seems happy and calm”
“The chews are soft”
“Good for allergies”
“Good ingredients”
What buyers complain about
“Cat allergy”
“It smells bad”
“The whole thing costed me almost $2,000”
“taste like poo, apparently”
“My cat had bad stomach from these”
“It did not work for my cat”
“not a popular flavor for us unfortunately”
“Too big”
“Formula changed”
“Cant use”
Top return reasons
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.