Is fish oil liquid profitable to sell on Amazon United States?

The niche generates $1.7M/yr across 33 tracked products. 90-day search growth is -3.4%. Flapen's verdict: Worth a look (58/100).

How competitive is the fish oil liquid niche?

10 brands and 598 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 95% of demand.

What do buyers complain about in fish oil liquid?

Top complaints mined from reviews: Taste-Overall, Allergies, Smell. The return rate is 0.0%.

When does demand for fish oil liquid peak?

Demand is steady year-round — the busiest month runs 1.3× the quietest.

What does it cost to enter the fish oil liquid niche?

Listings span $9.51–$56.55; the average listing price is $34.45 (sweet spot $15–$100). The average incumbent carries 3,388 reviews — the moat a new listing must climb.

fish oil liquid

Worth a look

Shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Incredible$34.45

avg listing price — sweet spot $15–$100

Market size

Great$1.7M

$1.7M/yr · 643K searches

Price range

Great$9.51–$56.55

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Great7.7%

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

Competition

Good47%

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

Review moat

Okay3,388.42

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-3.4%

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

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Brand share

Bad95%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, fish oil liquid is a $1.7M/yr Amazon United States market (643K searches/yr). The top 5 brands hold 95% of demand. Verdict: Worth a look — 58/100.

Data updated Jul 26, 2026 · scored weekly · How we score niches

fish oil liquid market data

Units sold / yr: 50K–60K; avg 1,250–1,500/product
Revenue / yr: $1.7M–$2.1M; units × avg price
Conversion rate: 7.7%
Avg BSR: #444
Page quality: 0%
Prime: 100%
Sponsored: 82%
Out of stock: 0.0%
Avg brand age: 86 months
Avg seller age: 156 days

Competition & brand share

The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.

Brands

10 rising

Sellers

598

Top-5 brand share

95%

Top 20: 100%

Top-5 click share

47%

Top 20: 86%

Open market

Carlson58%
Barlean's25%
Nordic Naturals9%
NOW Foods2%
Natural Force1%
Carlyle1%
Open — no brand owns it (4 brands, 4%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -3.4% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.3×

Open Trend

Top fish oil liquid search terms

carlson fish oil omega 3134K/yr -7.9%10.3% conv.
fish oil liquid76K/yr -12.3%4.9% conv.
barleans fish oil omega 355K/yr -2.2%7.2% conv.
liquid fish oil52K/yr -7.6%4.6% conv.
carlson fish oil50K/yr +6.4%8.1% conv.
barleans34K/yr +8.1%3.6% conv.
omega 3 liquid37K/yr -13.1%3.9% conv.
omega 3 fish oil liquid28K/yr -8.2%3.8% conv.
liquid omega 320K/yr -11.3%3.7% conv.
barleans fish oil24K/yr -19.5%4.3% conv.

All search terms

Top fish oil liquid 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Carlson - Elite Omega-3 Gems 1600 mg Omega-3 Fatty Acids Including EPA and DHA Norwegian Wild-Caught Fish Oil Supplement Sustainably Sourced Omega 3 Fish Oil Capsules Lemon 130 Softgels

Carlson$40.804.8★2,182 rev

Carlson - The Very Finest Fish Oil 1600 mg Omega-3s Liquid Fish Oil Supplement Norwegian Fish Oil Wild-Caught Sustainably Sourced Fish Oil Liquid Lemon 200ml 6.7 Fl Oz

Carlson$27.824.8★7,541 rev

Carlson - The Very Finest Fish Oil 1600 mg Omega-3s Liquid Supplement Norwegian Wild-Caught Sustainably Sourced Lemon 16.9 Fl Oz

Carlson$54.144.8★7,541 rev

Barleans Omega 3 Fish Oil Liquid Supplement with Vitamin D for Men and Women 1080mg of EPA and DHA Fatty Acid Promotes Brain & Heart Health - Non-GMO Mango Peach 8 oz

Barlean's$19.114.6★6,304 rev

Barleans Omega 3 Fish Oil Liquid Supplement with Vitamin D for Men and Women 1080mg of EPA and DHA Fatty Acid Promotes Brain & Heart Health - Non-GMO Mango Peach 16 oz

Barlean's$35.224.6★6,304 rev

Newest

by launch date

Carlyle Omega 3 Fish Oil Liquid 1650mg | 32 fl oz (2 x 16 fl oz Bottles)

Carlyle$26.90230 rev

3y ago

Carlson - Elite Omega-3 Gems 1600 mg Omega-3 Fatty Acids Including EPA and DHA Norwegian Wild-Caught Fish Oil Supplement Sustainably Sourced Omega 3 Fish Oil Capsules Lemon 130 Softgels

Carlson$40.802,182 rev

6y ago

Natural Force Pure Omega 3 - Liquid Fish Oil - Delicious Lemon Cake Flavor - Mercury Free Wild Caught Lab Tested - 1 326 mg Triglyceride EPA DHA & DPA - 16 Oz Glass Bottle

Natural Force$44.08816 rev

6y ago

Carlson - The Very Finest Fish Oil Special Edition 1600 mg Omega-3s Liquid Supplement Norwegian Fish Oil Wild-Caught Sustainably Sourced Liquid Lemon 500 mL (16.9 Fl Oz)

Carlson$55.431,214 rev

9y ago

Carlson - Maximum Omega 2000 2000 mg Omega-3 Fatty Acids Including EPA and DHA Wild-Caught Norwegian Fish Oil Supplement Sustainably Sourced Fish Oil Capsules Lemon 60 Softgels

Carlson$32.94878 rev

9y ago

What buyers say about fish oil liquid

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

What buyers love

Taste-Overall20%

“No fishy after taste”

Quality-Overall20%

“Excellent Quality”

Pet Friendly11%

“Cats love it”

Value For Money7%

“Affordable price”

Flavor5%

“The lemon flavor”

Allergies2%

“less itchy skin”

Smell2%

“there is no overpowering smell”

Advertised Vs Actual Product2%

“Item as described”

Soft Feel2%

“her hair is soft”

Brightness/Shine/Glow2%

“Its shiny and smooth”

What buyers complain about

Taste-Overall19%

“Poor taste”

Allergies10%

“Dog allergic”

Smell9%

“Has a strong fishy odor”

Leak-Proof7%

“One of them leaked”

Value For Money6%

“A little expensive”

Indigestion3%

“Made my dogs start throwing up and caused diarrhea”

Flavor3%

“No lemon flavor”

Functionality-Overall2%

“Doesnt work”

Dosage2%

“can't do large pills so I'll just take it anyway”

Ease Of Use2%

“Can't use it”

Top return reasons

Taste-Overall18%

Value For Money15%

Flavor10%

Oily/Greasy10%

Stale/Rotten/Spoiled8%

Functionality-Overall8%

Smell8%

Ingredients-Overall8%

Durability8%

Certifications8%

Common questions

Is fish oil liquid profitable to sell on Amazon United States?: The niche generates $1.7M/yr across 33 tracked products. 90-day search growth is -3.4%. Flapen's verdict: Worth a look (58/100).
How competitive is the fish oil liquid niche?: 10 brands and 598 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 95% of demand.
What do buyers complain about in fish oil liquid?: Top complaints mined from reviews: Taste-Overall, Allergies, Smell. The return rate is 0.0%.
When does demand for fish oil liquid peak?: Demand is steady year-round — the busiest month runs 1.3× the quietest.
What does it cost to enter the fish oil liquid niche?: Listings span $9.51–$56.55; the average listing price is $34.45 (sweet spot $15–$100). The average incumbent carries 3,388 reviews — the moat a new listing must climb.