Is cat immune support profitable to sell on Amazon United States?

The niche generates $68K/yr across 17 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -12.4%. Flapen's verdict: Skip it (49/100).

How competitive is the cat immune support niche?

14 brands and 16 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 71% of demand.

What do buyers complain about in cat immune support?

Top complaints mined from reviews: Allergies, Value For Money, Smell. The return rate is 0.1%.

When does demand for cat immune support peak?

Demand is steady year-round — the busiest month runs 1.4× the quietest.

What does it cost to enter the cat immune support niche?

Listings span $3.06–$30.84; the average listing price is $18.26 (sweet spot $15–$100). The average incumbent carries 3,462 reviews — the moat a new listing must climb.

cat immune support

Skip it

A small market ($68K/yr) — this niche doesn't clear our bar today.

Returns

Incredible0.1%

return rate — above 6% kills the launch gate

Avg price

Great$18.26

avg listing price — sweet spot $15–$100

Conversion

Great7.7%

search→purchase rate — share of searches ending in a sale

Price range

Good$3.06–$30.84

cheapest 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

Okay58%

top-5 click share — leaders hold, buyers still browse

Review moat

Okay3,462.24

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-12.4%

90-day search growth — must beat 0% to launch

Market size

Bad$68K

$68K/yr · 49K searches

According to Flapen's Amazon United States niche tracking, cat immune support is a $68K/yr Amazon United States market (49K searches/yr). The top 5 brands hold 71% of demand. Verdict: Skip it — 49/100.

Data updated Jul 9, 2026 · scored weekly · How we score niches

cat immune support market data

Units sold / yr: 3K–4K; avg 100–250/product
Revenue / yr: $55K–$73K; units × avg price
Launch success: —; 2 of 3 new (360d)
Conversion rate: 7.7%
Avg BSR: #22
Page quality: 0%
Prime: 100%
Sponsored: 88%
Out of stock: 0.0%
Avg brand age: 56 months
Avg seller age: 179 days

Competition & brand share

The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.

Brands

14 falling

Sellers

Top-5 brand share

71%

Top 20: 100%

Top-5 click share

58%

Top 20: 100%

Open market

23%

Pet Honesty28%
Vetoquinol15%
Coco and Luna11%
SANTKOL9%
TOMLYN8%
Pro Plan Veterinary Diets6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -12.4% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.4×

Open Trend

Top cat immune support search terms

cat immune support20K/yr +38.5%6.9% conv.
immune support for cats13K/yr -7.7%4.6% conv.
cat immune support supplement10K/yr -81.5%3.0% conv.
cat immune booster4K/yr -30.9%3.3% conv.
fiv cat supplement2K/yr -70.7%2.1% conv.

All search terms

Top cat immune support 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

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

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

L-Lysine for Cats 900mg - Immune Eye & Respiratory Support Powder

Coco and Luna$22.494.4★3,170 rev

Tomlyn Immune Support Daily L-Lysine Supplement Fish-Flavored Lysine Powder for Cats and Kittens 3.5oz

TOMLYN$20.294.6★5,419 rev

Newest

by launch date

Purina ONE Plus Immune Support Purees with Real Chicken Lickable Cat Treats - 1.4 oz (Pack of 4)

Purina ONE$3.0650 rev

7mo ago

Nutramax Imuquin Immune Health Supplement for Cats with Astaxanthin and Beta Glucans 30 Sprinkle Capsules

Nutramax Laboratories$19.101,046 rev

8mo ago

Lysine for Cats Supplement Immune System & Respiratory Health Support for Cats & Kittens 2floz Eye Discharge Sneezing Relief Tasty Easy-Mix Formula Daily Cat Lysine for Stronger Immunity

LTQXGT$12.3781 rev

10mo ago

Purina Pro Plan Veterinary Cat Supplements Multi Care Feline Supplement Digestive Probiotics for Cats Immune Support Cat Supplement - 30 ct. Box

Pro Plan Veterinary Diets$27.40667 rev

1y ago

Cat Multivitamin 15 in 1 Cat Vitamins Liquid Drops Supplements for Heart Health Bones Joint Skin & Coat Bladder Immune System Support 60ml

VOSIFSDIY$9.191,278 rev

1y ago

What buyers say about cat immune support

What buyers praise and complain about, mined from review topics.

What buyers love

Pet Friendly23%

“My cat approved”

Taste-Overall14%

“My cat absolutely LOVES the taste”

Quality-Overall9%

“Excellent product”

Flavor9%

“Strong flavor”

Value For Money6%

“Good Value”

Ease Of Use5%

“Easy to administer”

Soothing/Teething5%

“Helps kittens”

Allergies4%

“Helps with allergies”

Smell2%

“it doesnt smell bad like other brands I tried”

Ease Of Chewing/Swallowing2%

“The chewability is great as well”

What buyers complain about

Allergies10%

“itching a lot”

Value For Money10%

“It's a little expensive”

Smell9%

“It does have a fishy smell”

Indigestion8%

“Causes vomiting”

Taste-Overall6%

“The one cat that loved the taste isn't even the cat that I needed this for”

Functionality-Overall5%

“It did not work for my cat”

Ingredients-Overall4%

“The new formula is terrible”

Flavor3%

“my cat just doesn't seem to care for the chicken flavor”

Size-Overall3%

“The Bad: The Darn BAG is SO SMALL”

Ease Of Use3%

“I am unable to use it”

Top return reasons

Functionality-Overall21%

Advertised Vs Actual Product15%

Leak-Proof13%

Flavor9%

Indigestion5%

Defective Material/Parts5%

Smell5%

Value For Money4%