Is cod liver oil profitable to sell on Amazon United States?

The niche generates $4.4M/yr across 31 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -25.2%. Flapen's verdict: Worth a look (61/100).

How competitive is the cod liver oil niche?

17 brands and 586 sellers compete. The top 5 products take 53% of clicks and top 5 brands hold 75% of demand.

What do buyers complain about in cod liver oil?

Top complaints mined from reviews: Taste-Overall, Size-Overall, Value For Money. The return rate is 0.0%.

When does demand for cod liver oil peak?

Demand peaks in Jan; the busiest month runs 2.4× the quietest.

What does it cost to enter the cod liver oil niche?

Listings span $8.90–$66.55; the average listing price is $28.54 (sweet spot $15–$100). The average incumbent carries 3,067 reviews — the moat a new listing must climb.

cod liver oil

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

Market size

Incredible$4.4M

$4.4M/yr · 1.7M searches

Avg price

Incredible$28.54

avg listing price — sweet spot $15–$100

Price range

Great$8.90–$66.55

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

Conversion

Great9.3%

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

Competition

Good53%

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

Brand share

Okay75%

top-5 brand share — brands hold most of the demand

Review moat

Okay3,067.42

avg incumbent reviews — the moat a new listing must climb

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Growth

Bad-25.2%

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

According to Flapen's Amazon United States niche tracking, cod liver oil is a $4.4M/yr Amazon United States market (1.7M searches/yr). The top 5 brands hold 75% of demand. Demand peaks in Jan. Verdict: Worth a look — 61/100.

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

cod liver oil market data

Units sold / yr: 150K–200K; avg 4,000–5,000/product
Revenue / yr: $4.3M–$5.7M; units × avg price
Conversion rate: 9.3%
Avg BSR: #328
Page quality: 0%
Prime: 100%
Sponsored: 65%
Out of stock: 0.8%
Avg brand age: 91 months
Avg seller age: 149 days

Competition & brand share

The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.

Brands

17 falling

Sellers

586

Top-5 brand share

75%

Top 20: 100%

Top-5 click share

53%

Top 20: 89%

Open market

20%

Carlson28%
Natures Craft15%
Dr. Berg Nutritionals13%
NOW Foods12%
Nordic Naturals8%
Carlyle4%

Demand & seasonality

Weekly Amazon search volume, last 98 weeks — -25.2% search growth over the last 90 days.

Peak months: Jan · busiest ÷ quietest = 2.4×

Open Trend

Top cod liver oil search terms

cod liver oil923K/yr -25.7%7.5% conv.
cod liver oil capsules295K/yr -26.8%8.4% conv.
cod liver oil liquid99K/yr -32.8%5.7% conv.
carlson cod liver oil53K/yr -20.9%10.9% conv.
cod liver oil softgels26K/yr +10.2%8.6% conv.
cod liver oil organic40K/yr -46.2%5.3% conv.
nordic naturals cod liver oil21K/yr -14.1%7.8% conv.
dr berg cod liver oil12K/yr +16.7%13.7% conv.
organic cod liver oil16K/yr -29.2%4.2% conv.
aceite de bacalao14K/yr -8.8%1.2% conv.

All search terms

Top cod liver oil 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

Icelandic Wild Caught Cod Liver Oil Softgels - Fish Omega 3 EPA DHA Vitamin D & A 1000mg Per Serving - Burpless Capsules for Heart Joint Brain & Immune Support - 100 Count

Natures Craft$17.254.7★4,088 rev

Dr. Berg Omega-3 Cod Liver Fish Oil 60 Softgels Wild-Caught Icelandic Cod Omega 3 EPA & DHA Heart Brain Immune & Eye Support* Lemon Flavor 4X Lab-Tested Non-GMO No Fillers

Dr. Berg Nutritionals$34.914.8★1,045 rev

Carlson - Cod Liver Oil 1100 mg Omega-3s Liquid Fish Oil Supplement Wild-Caught Norwegian Arctic Sustainably Sourced Nordic Liquid Lemon 250 ml

Carlson$30.874.8★12,043 rev

NOW Foods Supplements Cod Liver Oil Extra Strength 1 000 mg with Vitamins A & D-3 EPA DHA 90 Softgels

NOW Foods$8.904.7★6,237 rev

Carlson - Cod Liver Oil 1100 mg Omega-3s Plus Vitamins A & D3 Wild Caught Norwegian Arctic Sustainably Sourced Nordic Fish Oil Liquid Lemon 500 mL (16.9 Fl Oz)

Carlson$49.544.8★12,043 rev

Newest

by launch date

Dr. Berg Omega-3 Cod Liver Fish Oil 60 Softgels Wild-Caught Icelandic Cod Omega 3 EPA & DHA Heart Brain Immune & Eye Support* Lemon Flavor 4X Lab-Tested Non-GMO No Fillers

Dr. Berg Nutritionals$34.911,045 rev

10mo ago

Cod Liver Oil Softgels 1000MG | Omega 3 + Vitamin A & D3 | Wild Caught Cod Liver Oil Icelandic Sourced & Molecularly Distilled | EPA DHA Omega 3 Supplement for Bone Eye & Immune Health | 60 Ct

MAV NUTRITION$13.50342 rev

11mo ago

Wild Caught Cod Liver Oil 2 000mg Per Serving 240 Softgels Extra Strength EPA DHA Omega 3 with Vitamin D & A Burpless Lemon Flavored Vision Heart Brain & Immune Support

DEAL SUPPLEMENT$20.55214 rev

1y ago

Sports Research Omega-3 Wild Alaskan Cod Liver Oil 1000mg with Vitamins A (1000 IU) & D3 (400 IU) - Burpless Bovine Free Non-GMO & MSC Certified Sustainable - 120 Softgels

Sports Research$23.14293 rev

1y ago

Cod Liver Oil 2 000mg Per Serving 360 Softgels | Burpless Lemon Flavored Rich in Omega 3 Vitamins A & D3 EPA DHA | Wild Caught Arctic Deep Sea Fish | Heart Brain & Immune Supplement

Micro Ingredients$28.55841 rev

2y ago

What buyers say about cod liver oil

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

What buyers love

Quality-Overall24%

“Very good product and very clean”

Taste-Overall14%

“No nasty after taste”

Vitamin7%

“a good amount of Vitamin D3”

Ease Of Chewing/Swallowing5%

“Easy to Swallow”

Value For Money5%

“reasonable price”

Flavor5%

“Smooth taste and Good size bottle gives you plenty to enjoy”

Advertised Vs Actual Product4%

“As advertised”

Ease Of Use2%

“Easy to use”

Nutritional Content2%

“I eat healthy”

Efficiency2%

“Its effective”

What buyers complain about

Taste-Overall18%

“Its not a very strong taste”

Size-Overall9%

“Way too small”

Value For Money8%

“Costly”

Ease Of Chewing/Swallowing6%

“It's way too big for me to swallow”

Vitamin4%

“Missing type of vitamin D”

Smell3%

“Smelled and tasted rancid”

Oily/Greasy3%

“Cod liver oil”

Ingredients-Overall2%

“Look at the ingredients before ordering this stuff is poison”

Quality-Overall2%

“Had a lot of hopes for this low processed, less expensive brand”

Nutritional Content2%

“I do not eat enough fatty foods or meat”

Top return reasons

Ingredients-Overall27%

Heart Health9%

Accuracy-Overall9%

Leak-Proof9%

Advertised Vs Actual Product9%

Smell9%

Dosage9%

Natural Ingredients9%

Certifications9%

Common questions

Is cod liver oil profitable to sell on Amazon United States?: The niche generates $4.4M/yr across 31 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -25.2%. Flapen's verdict: Worth a look (61/100).
How competitive is the cod liver oil niche?: 17 brands and 586 sellers compete. The top 5 products take 53% of clicks and top 5 brands hold 75% of demand.
What do buyers complain about in cod liver oil?: Top complaints mined from reviews: Taste-Overall, Size-Overall, Value For Money. The return rate is 0.0%.
When does demand for cod liver oil peak?: Demand peaks in Jan; the busiest month runs 2.4× the quietest.
What does it cost to enter the cod liver oil niche?: Listings span $8.90–$66.55; the average listing price is $28.54 (sweet spot $15–$100). The average incumbent carries 3,067 reviews — the moat a new listing must climb.